KELLER Pressure Japan List of Products and Services

The HPX, which can achieve high-precision pressure calibration from 0 to 70 MPa, is suitable for field use as it can quickly generate pressure manually. It also comes with a carrying case for easy transport! It is equipped with a high-precision digital pressure gauge LEX1, and values are output via both the display and RS485 interface. Additionally, it is possible to display pressure directly on a PC via a USB converter, allowing for saving, processing, and managing in any way. Extra features such as zero point reset, peak and bottom pressure value display, and leak measurement make measurements even easier! 【Features】 〇 Measurement accuracy: 0.05% FS 〇 Measurement interval: 0.5 seconds 〇 Hydraulic type 〇 Battery-operated 〇 Battery life: over 2000 hours of continuous operation 〇 USB interface converter included as standard 〇 Environmental characteristics: 0 to 50 °C / Relative humidity 5 to 95% 〇 CE compliant / RoHS compliant

• Pressure

In the field of pressure measurement technology, the type of pressure varies depending on the reference point (reference pressure). 【Absolute Pressure】 In absolute pressure, the process pressure is measured with a vacuum as the reference. In the manufacturing process, the back side (reference side) of the diaphragm within the sensor element is set to vacuum and sealed in that state. When atmospheric pressure is applied to the diaphragm, the sensor measures the atmospheric pressure (meteorological atmospheric pressure). All fundamental physical formulas related to pressure are based on absolute pressure data. 【Gauge Pressure】 In gauge pressure, the process pressure being measured is referenced against atmospheric pressure. In other words, it measures the difference between the process pressure and the current atmospheric pressure. Since atmospheric pressure is affected by altitude and weather, it constantly fluctuates. Therefore, for processes where variations from atmospheric pressure are significant, gauge pressure measurement is appropriate. The back of the measurement cell in gauge pressure sensors always has a vent hole, allowing the sensor element to reference atmospheric pressure within the housing. Gauge pressure is the most common type of pressure measured by pressure sensors and is used in nearly all applications and industries. For shielded gauge pressure and differential pressure, please refer to the related links below!

• Pressure

How do differential pressure sensors work, and how do they differ from other sensor types? Gauge pressure and absolute pressure sensors have defined reference points for measuring pressure differences (for absolute pressure: absolute vacuum, for gauge pressure: atmospheric pressure). In contrast, differential pressure sensors measure the difference between two pressures without defining a reference point. Differential pressure sensors can be made in various structures, but one feature of KELLER Pressure's products is that there is a type that can use liquid in both ports (e.g., model PD-33X). They can measure differential pressure with high resolution. There are also sensors that use two absolute pressure measurement cells to measure two pressures and determine the differential pressure through electronic circuits (model PD-39X). This structure is particularly suitable for high-pressure applications. Typical applications of differential pressure sensors: 1. Flow measurement There are several methods for measuring flow, but one common method is differential pressure measurement through an orifice plate. 2. Level measurement of liquefied gas tanks Liquefaction reduces volume, allowing for transportation and storage. Why is differential pressure measurement suitable for this water level measurement? For more details, please visit the URL below!

• Pressure

The pressure sensor 33X achieves an extremely high accuracy of 0.05% full scale (FS) over a temperature range of 10 to 40°C through a mathematical correction method. In addition to a digital RS485 interface, analog current or voltage outputs are also available. 【Features】 - Accuracy of ±0.05% FS over a temperature range of 10 to 40°C - Standard dual outputs of digital RS485 and analog output - Excellent long-term stability 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model to provide accurate pressure values

• Pressure

The compact digital pressure gauge ECO2 is affordable yet offers excellent resolution. The minimum/maximum values can be displayed simultaneously with the current pressure value, and the pressure units can be selected from multiple options. It can be installed in the desired position using a swivel adapter. The power supply is a standard CR2430 battery (included). 【Features】 〇 Accuracy 0.5 %FS 〇 Compact size 〇 Piezo-resistive pressure sensor 〇 Battery life of up to 1000 hours 〇 Available in intrinsically safe explosion-proof type (ECO2-Ei) 【Functions】 〇 Selectable pressure units (bar, mbar, hPa, kPa, MPa, PSI, kp/cm2) 〇 Zero point calibration via button 〇 Automatic shutdown 〇 Minimum/maximum value display

• Pressure

The digital manometer LEO1 can record high-speed pressure peaks with a measurement interval of 1000 times per second in addition to standard measurements. The minimum/maximum values can be displayed simultaneously with the current pressure value, and the pressure units can be selected from multiple options. The power supply is a standard CR2430 battery (included). 【Features】 〇 High precision of ±0.1FS 〇 Piezo-resistive pressure sensor 〇 Battery life of up to 1000 hours 〇 Capable of high-speed pressure peak detection 〇 Available in intrinsically safe explosion-proof type (LEO1-Ei) 【Functions】 〇 Selectable pressure units (bar, mbar, hPa, kPa, MPa, PSI, kp/cm2) 〇 Zero point calibration via button 〇 Automatic shutdown 〇 Minimum/maximum value display 〇 Switching between standard measurement mode (2 Hz) and high-speed measurement mode 〇 High-speed measurement mode is ≥ 1 kHz

• Pressure

The 21Zio series pressure transmitters, equipped with an IO-Link interface, can also be used as pressure switches. The IO-Link interface, compliant with IEC 61131-9, allows the 21Zio to be seamlessly integrated into intelligent automation systems. Switching functions and other parameters can be called and reconfigured via IO-Link, enabling rapid commissioning and flexible adaptation to specific requirements. This minimizes machine downtime and reduces workload. The pressure connection is made of stainless steel with a fully welded structure and no internal seals, ensuring that the 21Zio series delivers the highest durability and reliability even in harsh environments. It is the ideal solution for modern automation applications that require high precision, flexibility, and durability.

• Pressure

KELLER Pressure has been supplying pressure sensors to a wide range of sectors in the aerospace industry since 1997, and its pressure measurement technology has proven its reliability over hundreds of thousands of hours of flight. Reliability is paramount in the aerospace field, and the products used have demonstrated this aspect. 【Example of Achievements: Space Sector】 - Rockets (fuel, oxidizer) - Satellites (barometric measurement during atmospheric entry) - Combustion pressure measurement - Aircraft attitude control - Detonation - International Space Station (ISS) 【Example of Achievements: Aviation Sector】 - Pressure control in the cabin - Hydraulic distributors and filters - Valve control - Fuel pumps - Refueling systems - Air conditioning systems - Ventilation - Emergency oxygen supply for pilots You can see how different each application is and how broad the demands for pressure measurement technology are. While custom solutions are available, KELLER's strength lies in its extensive track record with standard catalog products. This significantly improves parts procurement and management, costs, and delivery times. Please consult with KELLER, which has strong expertise in the aerospace field!

• Pressure

The pressure sensor series 21PHB is a compact pressure sensor capable of measuring not only static pressure but also dynamic pressure with a bandwidth of 20 kHz. It can be used for both liquids and gases. It features a built-in amplifier that outputs a 0-10V analog signal. The small sensor head (pressure receiving part) with M6 fine thread can be used at temperatures up to 100°C, and it has a pressure resistance of up to four times the measurement range. 【Features】 〇 Capable of measuring dynamic pressure with a bandwidth of up to 20 kHz in addition to static pressure (ideal for measuring pulsations and unsteady behaviors) 〇 Built-in amplifier type with 0-10V analog signal output 〇 Sensor head can be used up to 100°C 〇 ±0.1% FS accuracy (achieves ±0.5% FS even in the temperature range of -10 to 80°C) 〇 Welded structure type without internal seals 〇 Compact design, pressure connection with M6 x 0.5 fine thread 〇 Robust structure (IP67), ideal for use in test benches 〇 Allows temperature reading and zero adjustment using RS485 interface (please contact us for details)

• Pressure

Pressure peaks in closed systems can cause significant damage and are complex phenomena. But what exactly is a pressure peak? How does it occur, and how can we protect the system from pressure peaks? We will explain the role of precise measurements in ensuring the safety and efficiency of pressure systems. 1. What is a pressure peak and why does it occur? The physical principles behind the phenomenon are Newton's three laws of motion and Bernoulli's principle. What causes water hammer and cavitation, and what are their effects? 2. Preventive measures Using simulations, protective components such as pressure dampers, pressure reducers, and check valves, as well as pressure sensors. 3. Why are pressure sensors necessary to protect the system from pressure peaks? Continuous monitoring with sensors allows for real-time recording of pressure peaks and can trigger automatic responses such as valve opening and closing. In the event of a failure of system components or protective parts, it can not only be directly detected but also prevented. Alarms can be automatically sent to responsible personnel via email, IoT, cloud, etc., in case of anomalies. For more details, please refer to the related links below!

• Pressure

The K-114 series converter is an interface converter for communicating between Keller devices (such as pressure sensors and level gauges) equipped with RS485 communication and a PC via USB. 【Features】 〇 RS485 (Keller device side) ⇔ USB communication (half-duplex communication) 〇 Power supply to connected devices from the PC 〇 Easy connection to devices and PC using the included cable 〇 Dedicated software is available in Japanese, license-free, and provided at no cost * K-114 series K-114, K-114-A, K-114-B, K-114-M, K-114-V

• Pressure

The MPX, capable of high-precision pressure calibration from -85 kPa to 2.5 MPa, is suitable for field use as it can quickly generate pressure manually. Pressure is raised to an approximate level using a hand pump, and then fine-tuned to the exact target pressure with an adjustment valve. It also comes with a carrying case for easy transport! The high-precision digital pressure gauge LEX1 is installed, and values are output via both the display and RS485 interface. Additionally, pressure can be displayed directly on a PC through a USB converter, allowing for storage, processing, and management in any way desired. Extra features such as zero point reset, peak and bottom pressure value display, and leak measurement make measurements even easier! 【Features】 〇 Measurement accuracy: 0.05% FS 〇 Measurement interval: 0.5 seconds 〇 Pneumatic type 〇 Battery operated 〇 Battery life: over 2000 hours of continuous operation 〇 USB interface converter included as standard 〇 Environmental characteristics: 0 to 50 °C / Relative humidity 5 to 95% 〇 CE compliant / RoHS compliant

• Pressure

The differential pressure transmitter PD-23X is a high-precision differential pressure sensor that can also handle liquid/liquid differential pressure. A single silicon diaphragm integrated inside directly measures the pressure difference applied from both ports. This design allows for the measurement of small pressure differences under very high line pressures. It achieves an extremely high accuracy of 0.1% full scale (FS) using correction technology based on a mathematical model that provides accurate pressure values. 【Features】 - ±0.1% FS accuracy - Capable of measuring liquid/liquid differential pressure - Standard dual outputs of digital RS485 and analog output - Analog output can be range-adjusted via digital RS485 - Temperature range of -20 to 125℃ - High line pressure (up to 60 MPa) - Excellent long-term stability 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model for accurate pressure values

• Pressure

The Dutch public enterprise WMD Drinkwater is monitoring groundwater extraction using the KELLER DCX-22AA groundwater data logger. The evaluation points for the DCX-22AA by WMD Drinkwater are: 1. The best cost-performance ratio 2. The barometric correction system is very simple and convenient 3. All functions are overwhelmingly user-friendly, and linking the serial number with the installation location is easy. Barometric correction is performed by a second pressure sensor within the communication unit. The DCX-22AA is equipped with real-time barometric correction functionality, making it suitable for purposes such as groundwater level measurement and sewage overflow detection. The entire sensor is waterproof (IP67), so there is no problem even if the measuring tube gets flooded. Since the PC connection part of the communication unit is located at the top of the measuring tube, there is no need to remove the tube when reading data. This allows for real-time monitoring of measurement data and easy comparison with manually measured values. The barometric correction feature eliminates the need for additional air pressure loggers for installation and reading, as well as manual barometric correction, simplifying system operation. For more details, please refer to the related links below!

• Pressure

The capacitive differential pressure transmitter PD-41X is designed to measure small differential pressures. It utilizes correction technology based on a mathematical model that provides accurate pressure values, achieving an accuracy of 0.2% full scale (FS). In addition to a digital RS485 interface, analog current or voltage outputs are available. 【Features】 - Although calibrated for a standard range, programming of the analog output signal within the standard pressure range is possible using the license-free software CCS30 (e.g., standard pressure range 0-10 kPa/output 4-20 mA → pressure range 2-6 kPa/output 4-20 mA). - Using the software CCS30 and converter K-114, pressure values can be displayed on a PC. Recording of pressure signals and graphical display, as well as zero adjustment, are also possible. - Up to 128 transmitters can be connected to the bus system.

• Pressure

The differential pressure transmitter PD-33X is a high-precision differential pressure sensor capable of measuring liquid/liquid differential pressure. A single silicon diaphragm integrated inside directly measures the pressure difference exerted from both ports. This design allows for the measurement of small pressure differences even under very high line pressures. It achieves an extremely high accuracy of 0.05% full scale (FS) in the temperature range of 10 to 40°C using correction technology based on a mathematical model that provides accurate pressure values. 【Features】 - Accuracy of ±0.05% FS in the temperature range of 10 to 40°C - Capable of measuring liquid/liquid differential pressure - Standard equipped with two outputs: digital RS485 and analog output - Analog output can be range-changed via digital RS485 - Temperature range of -20 to 125°C (optional -40°C available) - High line pressure (up to 60MPa) - Excellent long-term stability 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model to provide accurate pressure values

• Pressure

The Levelgage water level gauge is an inexpensive and versatile water level measuring device that can be used for various applications such as rivers, wells, and boreholes. It has obtained UL certification for drinking water use according to NSF/ANSI standards 61 and 372. The output is an analog signal in current or voltage with an accuracy of ±0.25% FS. The analog output type of 4-20mA comes standard with a lightning protection device to prevent damage from voltage surges. It is made of SUS316L, which offers excellent corrosion resistance.

• Pressure

The Acculevel water level gauge achieves high precision of ±0.1% FS or ±0.25% FS over a temperature range of -10 to 60°C through digital circuitry. It comes standard with two outputs: analog (current or voltage) and digital RS485. By using the RS485 interface, it is possible to connect to a PC, obtain water level and temperature data, and rescale the analog output. It complies with NSF/ANSI standards 61 and 372, making it suitable for drinking water applications. The analog output type with 4-20mA includes a built-in lightning protection device as standard, preventing damage from voltage surges. The water level gauge is made of SUS316L, which has excellent corrosion resistance (with an option to change to titanium).

• Pressure

Keller's pressure sensors play a crucial role in hydrogen engine-equipped racing cars. This is because extremely high precision and reliability are essential in hydrogen systems within motorsports. Keller's pressure sensors are used in fuel cell powertrains, supporting the precise monitoring and control of hydrogen and air circuits under harsh high-performance conditions. 〇 Hydrogen Loop Keller's pressure sensors monitor the flow of hydrogen within the fuel cell by measuring optimal pressure levels, contributing to the realization of efficient electrochemical reactions. 〇 Air Loop Accurate pressure measurements are essential for the optimal management of oxygen supply, which directly impacts the efficiency and output of the fuel cell. 〇 High-Pressure Hydrogen Line Keller's pressure sensors are widely adopted in high-pressure hydrogen lines, as well as in hydrogen-driven test benches and onboard storage systems. In motorsports, reliability is paramount in a world where every second counts. Additionally, components that can withstand extreme pressures and rapid changes in load under harsh conditions are indispensable. Using Keller products, which boast the highest levels of precision and reliability and are Swiss-made, is a testament to a deep commitment to quality. For more details, please refer to the related links below!

• Pressure

Hydrogen is at the center of energy conversion, bringing unique possibilities for the decarbonization of industries and the transformation of energy consumption. Hydrogen is considered an environmentally friendly fuel because it does not release harmful exhaust gases such as CO₂, nitrogen oxides, or particulate matter when used for energy generation. However, hydrogen gas, which is regarded as one of the pillars of the future of energy, faces significant technical challenges in terms of storage, transportation, and measurement. How are KELLER's pressure sensors designed to meet these requirements? KELLER's hydrogen market specialist will answer that! (The article can be found through the related link below) 1. What is hydrogen? 2. Hydrogen as a fuel 3. Storage and transportation of hydrogen Comparison of hydrogen consumption and drum capacity, gaseous hydrogen, liquid hydrogen, and other methods 4. Challenges in pressure transmitters and hydrogen measurement Hydrogen embrittlement, permeation, leakage, ATEX certification, and intrinsic safety explosion protection 5. Introduction to pressure sensors for hydrogen KELLER's pressure sensors for hydrogen are products that meet stringent safety and performance standards, addressing various needs across the entire hydrogen supply chain, including refining, green ammonia production, metallurgy, storage, transportation, and electrolysis!

• Pressure

The 20SX series pressure sensor head with screw connection is specially designed and optimized for OEM applications, achieving the highest level of accuracy, excellent long-term stability, and high pressure resistance. Features that many pressure sensor manufacturers offer only as options are standard in Keller products. The 20SX series is characterized by a compact, fully welded design and high-precision, range-changeable digital correction electronics. Accuracy errors, including thermal effects, are minimized or corrected using mathematical models. As a result, it achieves the highest accuracy and an extremely narrow Total Error Band (TEB). The introduction of the 20SX series has further expanded OEM products. 【Features】 • High accuracy of ±0.05% FS • Standard dual outputs of digital RS485 and analog output • Analog output can be range-changed via digital RS485 • Excellent long-term stability 【Technology】 • Piezo-resistive pressure sensor • Fully welded structure without internal seals • Correction technology using mathematical models to provide accurate pressure values • Based on the technology used in the 33X series, achieving the highest level of accuracy.

• Pressure

As attention focuses on hydrogen, which is considered a pillar of the future of energy, the importance of electrolyzers that decompose water into hydrogen is increasingly rising. In a proton exchange membrane (PEM) electrolyzer, water enters one side of the device, and hydrogen passes through a permeable membrane to the opposite side due to the electric current, resulting in the decomposition of water into oxygen and hydrogen. Since hydrogen is often stored at high pressure after electrolysis, it is considered preferable to operate the electrolyzer at high pressure as well, as this can eliminate the need for additional compression processes. Therefore, it is necessary to control the pressure of the oxygen and hydrogen generated in the electrolyzer, and even if this can be achieved through back pressure control, it is essential to minimize the pressure difference between the two flows to avoid mechanical stress on the electrolyzer's membrane. For example, what should be done if the pressure difference between the oxygen side and the hydrogen side in a high-pressure electrolyzer is low, ranging from 1 to 10 kPa (which is the maximum pressure difference that the membrane can handle)? What if a pressure measurement accuracy of <0.1% FS is required? This is where Keller's differential pressure sensor PD-39X comes into play. The PD-39X is equipped with two absolute pressure sensors, excels in pressure resistance on one side, and can achieve an accuracy of 0.1% FS. For more details, please refer to the related links below!

• Pressure

The differential pressure sensor series PD-39X is a high-precision model that indirectly measures differential pressure using two absolute pressure sensors and boasts high pressure resistance performance. In addition to a digital output (RS485), it comes standard with two outputs: analog current or voltage output. The analog output can be freely scaled within the line pressure range based on the settings of the digital signal. There is also an intrinsically safe explosion-proof type available (PD-39X-Ei).

• Pressure

The Econoline pressure sensor achieves high precision of ±0.5% FS (at room temperature) in a general-purpose design and can be obtained in a short delivery time of about 1 to 2 weeks after ordering (limited to standard specifications). It outputs a 4-20mA analog signal. It is certified to NSF/ANSI 61 and 372 standards, making it suitable for drinking water applications. The wetted/gas contact parts are made of SUS316L, making it a model that can be used in a variety of applications.

• Pressure

The 26KyX series water level gauge is a submersible water level gauge specially developed for sewage and wastewater applications. It features a diaphragm made of Kynar with PTFE properties, providing resistance to viscous media along with excellent hardness and abrasion resistance. The 26KyX water level gauge can be easily installed in harsh environments without the need for expensive protective cages that take up space. Measurement results can be obtained via an RS485 interface, as well as through analog signal output via a built-in D/A converter, allowing for scaling settings (modification of the water level range). A version with a built-in lightning protection device is also available (optional). 【Features】 - Anti-fouling diaphragm design - Body material made of SUS316L - RS485 serial communication - Accurate correction technology

• Pressure

Using a pressure transmitter makes measuring pressure easy. However, how can we design and manufacture a perfect pressure transmitter? What is necessary to create an accurate and reliable measurement system? Our Technical Director, Bernhard Vetterli, explains. You can find the article through the related link below!

• Pressure

The pressure sensor 35X achieves an extremely high accuracy of 0.05% full scale (FS) in the temperature range of 10 to 40°C through a mathematical correction method. In addition to a digital RS485 interface, analog current or voltage outputs are also available. 【Features】 - Pressure connection with a G1/2 flush diaphragm structure. Difficult to accumulate liquid and easy to clean. - Accuracy of ±0.05% FS in the temperature range of 10 to 40°C. - Standard equipped with two outputs: digital RS485 and analog output. - Analog output can be range-changed via digital RS485. - Excellent long-term stability. 【Technology】 - Piezo-resistive pressure sensor. - Correction technology using a mathematical model to provide accurate pressure values. ● What is a flush diaphragm structure? → The pressure receiving surface is protruding at the front. ● What are the characteristics of a flush diaphragm structure? 1. Suitable for measuring the pressure of viscous liquids such as ink. 2. Suitable for applications that require regular cleaning. 3. Can be used in food processes if it is a clamp type.

• Pressure

The differential pressure sensor 33X achieves an extremely high accuracy of 0.05% full scale (FS) in the temperature range of 10 to 40°C through a mathematical correction method. In addition to a digital RS485 interface, analog current or voltage outputs are also available. 【Features】 • Piezo-resistive differential pressure sensor capable of measuring liquid/liquid differential pressure • Accuracy of ±0.05 %FS in the temperature range of 10 to 40°C • Standard dual outputs of digital RS485 and analog output (Analog output options include 4–20 mA, 0–5 V, 0–10 V, and 0.1–2.5 V) • Analog output range can be changed via digital RS485 • Line pressure: up to 60MPa • Excellent long-term stability • Correction technology using a mathematical model to provide accurate pressure values

• Pressure

The 23SXio series high-precision pressure transmitters, equipped with an IO-Link interface, can also be used as pressure switches. The IO-Link interface, compliant with IEC 61131-9, allows the 23SXio to be seamlessly integrated into intelligent automation systems. Switching functions and other parameters can be called and reconfigured via IO-Link, enabling rapid commissioning and flexible adaptation to specific requirements. This minimizes machine downtime and reduces workload. The pressure connection is made of stainless steel with a fully welded structure and no internal seals, ensuring that the 23SXio series delivers the highest durability and reliability even in harsh environments. The 23SXio series pressure transmitters are the ideal solution for modern automation applications that require high precision, flexibility, and durability.

• Pressure

The data logger DCX-22AA-CTD measures not only water level but also conductivity in addition to water level. By separating two waterproof absolute pressure sensors into the measurement unit and the communication unit, it corrects for changes in atmospheric pressure and outputs the water level (pressure). Unlike gauge pressure systems, it does not require an open atmospheric tube, making it resistant to humidity and allowing for immersion. With a long-lasting battery, it can continue to record measurements over an extended period (up to 10 years with a measurement frequency of once per hour). The logger can set measurement intervals, incident management, and delayed measurement start using the included dedicated software, and the recorded data can be displayed in graphs or charts, corrected using atmospheric pressure values, or exported by converting to fill levels or other units.

• Data Logger

The data logger DCX-22-CTD measures not only water level but also water temperature and conductivity. With a long-lasting battery, it can continue to record measurement results for an extended period (up to 10 years with a measurement frequency of once per hour). By selecting the optional PT1000 temperature sensor, it achieves a temperature accuracy of ±0.1°C. Conductivity can be measured within the selected range (0.2/2/20/200 mS/cm) with an accuracy of ±2.5%. The logger can be configured using the included dedicated software for measurement intervals, incident management, delayed measurement start, etc., and the recorded data can be displayed in graphs or charts, corrected using atmospheric pressure values, or exported by converting to fill levels or other units. 〇 DCX-22 CTD: Absolute pressure type without a bench tube 〇 DCX-22 (SG/VG) CTD: VG is a general design using gauge pressure sensors (SG is shielded gauge pressure)

• Data Logger

The data logger DCX-38 is a water level meter for low water level measurements. It can detect water levels with an overall accuracy of just 1 mm (measurement range of 0.5 m water column, compensation temperature range of 10 to 40°C). With a long-lasting battery, it can continuously measure water level (pressure) and temperature over an extended period (up to 10 years with a measurement frequency of once per hour). The logger can be configured using the included dedicated software for measurement intervals, incident management, delayed measurement start, and more. The recorded data can be displayed in graphs or charts, corrected using barometric values, and exported converted to fill levels or other units. Silica gel prevents moisture intrusion into the sensor.

• Data Logger

The data logger DCX-25PVDF is specially designed for measurements in highly corrosive liquids such as brackish water and sewage. The housing is made of PVDF (polyvinylidene fluoride), and the pressure sensor material can be selected from Hastelloy C-276 or titanium 6AL-4V. With a long-lasting battery, it can continuously measure water level (pressure) and temperature over an extended period (up to 10 years with a measurement frequency of once per hour). The logger can be configured using the included dedicated software for measurement intervals, incident management, delayed measurement start, and the recorded data can be displayed in graphs or charts, corrected using atmospheric pressure values, and exported by converting to fill levels or other units.

• Data Logger

The high-pressure hand pump HTP1 is equipped with an adjustment function, allowing it to easily and accurately generate pressures up to 70 MPa, making it ideal for calibrating digital pressure gauges and pressure transmitters. An additional pressure gauge is required for measuring the reference value of the generated pressure. The LEX1 series is recommended for the pressure gauge. 【Features】 〇 Generated pressure: 0–70 MPa 〇 Simple and portable hand pump 〇 Comes standard with a convenient carrying case 〇 Easy to set up for digital pressure gauges for reference instruments

• Pressure

The data logger DCX-22 AA measures water level (pressure) by correcting atmospheric pressure changes through the placement of two absolute pressure sensors divided between the measurement unit and the communication unit. Unlike gauge pressure systems, it does not require an open atmospheric tube, making it resistant to humidity and suitable for immersion. With a long-lasting battery, it can continuously measure water level (pressure) and temperature over an extended period (up to 10 years at a measurement frequency of once per hour). The logger allows for setting measurement intervals, incident management, delayed measurement start, and more using the included dedicated software, and the recorded data can be displayed in graphs or charts, corrected using atmospheric pressure values, and exported by converting to filling levels or other units. 【Features】 〇 φ22mm water depth and temperature data logger 〇 Durable SUS316L housing 〇 Configuration, data reading, and visualization possible on PC using dedicated software

• Data Logger

The DCX-22 ECO data logger is a low-cost model of the high-precision DCX-22 data logger. With a long-lasting battery, it can continuously measure water level (pressure) and temperature over an extended period (up to 10 years with a measurement frequency of once per hour). The data logger can be configured using the included software (for measurement intervals, incident management, delayed measurement start, etc.), and the recorded data can be displayed in graphs or charts, corrected using barometric values, or exported by converting to fill levels or other units.

• Data Logger

Keller's pressure sensors are used in rockets that fly to the thermosphere! SSC (Swedish Space Corporation) is a global leading company that provides cutting-edge space engineering, satellites, and launch services. SSC's rocket, the Suborbital Express, flies to an altitude of 260 km into the thermosphere, conducting scientific experiments in a microgravity environment on behalf of research institutions and companies. The experiments are conducted in a microgravity state, after which the rocket falls back to Earth. After a helicopter retrieves the rocket, SSC evaluates and analyzes the collected data and shares it with the users. In this rocket launch, Keller's pressure sensor PAA-33X was incorporated into the experimental module "ARLES-II." Prior to this, in the summer of 2019, Keller's pressure sensors were also used for pressure monitoring in the experimental module "ARLES-I." Using the pressure sensors, the pressure within a series of experimental cells was monitored, where experiments involving droplets and graphene particles (graphene is considered a future material due to its tear resistance, high elasticity, and conductivity) were conducted. Keller sensors were also used to measure the gas pressure inside the nitrogen tanks on board!

• Pressure

The DCX-22 data logger achieves higher accuracy than other narrow-diameter loggers. With its long-lasting battery, it can continuously measure water level (pressure) and temperature over an extended period (up to 10 years with a measurement frequency of once per hour). The data logger can be configured using the included software (measurement intervals, incident management, delayed measurement start, etc.), and the recorded data can be displayed in graphs or charts, corrected using atmospheric pressure values, and exported converted to fill levels or other units.

• Pressure

The LevelRat water level gauge employs an integrated Kynar diaphragm, offering a robust and wear-resistant design compared to traditional rubber diaphragms coated with Teflon. It is an ideal product for measuring water levels in liquids containing suspended solids. 【Features】 〇 Designed for installation in hazardous locations, with UL/cUL certified intrinsic safety (IS) design 〇 Static accuracy of 0.25% FS, total accuracy (TEB) of 0.5% FS 〇 The 4-20mA model comes standard with built-in lightning protection 〇 The standard wetted material is SUS316L. Titanium is also available as an option for harsh applications 〇 Features a Kynar non-stick diaphragm with excellent durability. A spacer to enhance protective performance is also available as an option (see image) 〇 2-year warranty 〇 When selecting outputs including RS485: 　1. A functional interface for control, data collection, and remote measurement systems is available 　2. The range of the analog output can be changed to meet customer needs 　3. When operating with RS485-compatible MODBUS, up to 128 water level gauges can be operated in parallel 〇 Delivery time is as short as 2 weeks

• Pressure

KELLER has been supplying pressure sensors to various aircraft sectors since 1997. - Pressure control in the cabin - Hydraulic distributors and filters - Valve control - Fuel pumps - Refueling systems - Air conditioning systems - Ventilation - Emergency oxygen supply to pilots Approximately 40,000 KELLER sensors are in operation in the sky, with about 30,000 used for cabin pressure control. Accurate control of cabin pressure contributes to comfort, especially during takeoff and landing. Currently, all Airbus models and Boeing's 787 (Dreamliner) utilize KELLER's pressure measurement technology. Their reliability has also been proven. For example, cabin pressure sensors require 200,000 to 400,000 hours of error-free operation, and one of our major customers confirmed over 1 million hours of MTBF during a year of observation. In addition to the detailed explanation above, you can also enjoy the following in the "Related Materials": 1. How safe is air travel now? 2. Where are the 10 types of KELLER pressure sensors used? 3. Delving into the secrets of the Airbus A380, Airbus A400M, and Boeing 787 (Dreamliner).

• Pressure

Hydrogen poses a risk of permeation leading to leaks due to being the smallest molecule on Earth. It also has a highly flammable characteristic when exposed to air. Therefore, it is crucial to prevent leaks from hydrogen tanks or to detect them early. Keller's pressure sensors are used for leak testing in hydrogen fuel cells. The hydrogen fuel cell has three channels: one for air (oxygen), one for hydrogen, and one for cooling. Nitrogen is used first, followed by hydrogen, to detect leaks within the system. The pressure values at the inlet and outlet of the fuel cell are continuously recorded and displayed on the screen in real-time, allowing for ongoing monitoring. A drop in pressure indicates a leak in one of the three flow paths. Keller's pressure sensors have high accuracy, enabling them to detect leaks in even the smallest areas that are not sealed, ensuring the safe use of fuel cells. For more details, please refer to the related materials below.

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The pressure sensors produced by KELLER in Switzerland are the original products invented over 50 years ago by founder Hannes W. Keller. Each package bears our quality seal, proving that all delivered products are within the specified accuracy class. KELLER symbolizes high-precision measurement technology. In 1966, Hannes W. Keller (commonly known as HWK) was working at the Honeywell Research Center in Minneapolis, USA. There, he invented the integrated silicon measuring cell, a high-precision measuring element manufactured using semiconductor technology, in collaboration with A.R. Gias. This silicon measuring cell was already incorporated into Honeywell's process transmitters and introduced to the American market in 1971. HWK brought this young invention back to Switzerland, developed the first high-precision static pressure transducer, and has been manufacturing it at the headquarters in Winterthur, Switzerland, since 1974. On July 25, 1978, HWK's invention was officially patented (U.S. Patent No. 4103273). The patent number is also embedded in the quality seal. For more details about KELLER quality, please refer to the related links below!

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The industrial, energy, and mobility markets are undergoing significant transformation, but at the same time, they face many challenges. Keller will contribute to solving these issues with pressure sensors! Challenge 1: Permeation → Gold-plated diaphragm Challenge 2: Hydrogen embrittlement → Special stainless steel with increased nickel content Challenge 3: Gas leakage → Metal seal connections Challenge 4: Intrinsic safety explosion protection → Obtaining ATEX and IECEx certification

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The deeper you go into the ocean, the greater the pressure becomes. At the deepest part of the ocean (about 11,000 meters), the pressure is an astonishing 1,100 times that of the sea surface! The deepest fish discovered was found at a depth of 8,300 meters (in the Izu-Ogasawara Trench). How can fish survive in such high-pressure deep-sea environments? One reason is believed to be that they possess a special substance called TMAO (trimethylamine N-oxide) that helps them cope with the pressure. TMAO plays a role in preventing proteins inside cells from being crushed by water pressure. However, there are things that TMAO cannot do. For that... check out the YouTube link below!

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The unit of force, the newton, is named after the British physicist/mathematician Isaac Newton. However, he also invented something completely different. It is for cats... The correct answer is in the YouTube link below!

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