KELLER Pressure Japan List of Products and Services

The 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. An additional option for high precision of 0.01% FS is also available. In addition to a digital RS485 interface, analog current or voltage outputs can be obtained. 【Features】 - 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 can be range-adjusted via digital RS485 - Available in barometric range type (800–1200 hPa) and differential pressure range type (from 0–30 kPa to 0–3 MPa) - Temperature range of -20 to 125°C (optional -40°C also available) - Excellent long-term stability 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model to produce accurate pressure values

The pressure sensor 35X 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. An additional option for high precision of 0.01% FS is also available. In addition to a digital RS485 interface, analog current or voltage outputs are provided. The pressure connection features a G1/2 flush diaphragm structure. 【Features】 - ±0.05 %FS accuracy - The flush diaphragm structure allows for cleaning of the pressure receiving part! - Standard dual outputs of digital RS485 and analog output - The analog output can be range-adjusted via digital RS485 - Temperature range of -40 to 125°C - Excellent long-term stability 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model to produce accurate pressure values *What is a flush diaphragm structure? Typical pressure sensors have a screw at the tip, with the pressure receiving part located behind it. However, if you want to measure the pressure of ink or need to regularly clean the pressure receiving part, it is not possible to see inside, making it difficult to confirm whether it has been cleaned properly. In such cases, a flush diaphragm with the pressure receiving surface exposed is recommended!

The pressure sensor 35XHT/35XHTT can be used for media temperatures up to 150°C and is suitable for use in bioreactors and autoclaves that require regular sterilization due to its flush diaphragm structure. It achieves an accuracy of ±0.15% full scale (FS) over a temperature range of 20 to 120 °C using a mathematical correction method. The pressure connection of the standard model in the 35XHTT series features a G1/2 flush diaphragm structure. 【Features】 〇 Usable for media temperatures up to 150°C 〇 Standard equipped with two outputs: digital RS485 and analog output 〇 Analog output can be range-adjusted (turndown) via digital RS485 〇 Excellent long-term stability *What is a flush diaphragm structure? Unlike regular pressure sensors that have a screw at the tip with a pressure receiving part behind it, if you want to measure the pressure of ink and need to regularly clean the pressure receiving part, you cannot confirm if it has been cleaned properly since you cannot see inside. In such cases, a flush diaphragm with the pressure receiving surface exposed is recommended!

The high-temperature pressure sensor 35XHTC can be used for media temperatures up to 300°C. It is significantly different from the commonly available pressure sensors that can simply be used at high temperatures, as it achieves high accuracy of ±0.5% full scale (FS) even at a media temperature of 300°C through a mathematical correction method. In addition to a digital RS485 interface, analog current or voltage outputs are available, and scaling settings can be configured via the digital signal. The pressure connection is standard G1/2 male thread (flush diaphragm). *From 2025, the model name will change to 35HTCX. 【Features】 • Can be used at media temperatures up to 300°C, achieving ±0.5% accuracy at 300°C • Standard dual outputs of digital RS485 and analog output • Analog output range can be changed via digital RS485 (turndown) • Excellent long-term stability • Cooling capillary tube structure

The pressure sensor series 23SX is a high-precision pressure sensor that compensates for temperature dependence and non-linearity through mathematical correction within the microcontroller. It comes standard with two outputs: digital RS485 and analog output via a D/A converter. With a fully welded structure that does not use internal seals, it can be used in a wide range of applications. Only stainless steel comes into contact with the measured medium. 【Features】 - Standard equipped with two outputs: digital RS485 and analog output - The analog output can be range-changed via digital RS485 - Achieves excellent long-term stability - Fully welded structure without internal seals 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model to provide accurate pressure values - Based on the technology used in the 33X series, achieving the highest level of accuracy

The 23SY-H2(Ei) series is characterized by a low embrittlement rate due to an increased nickel content in the stainless steel used. The gold-plated diaphragm minimizes hydrogen diffusion. Additionally, the pressure sensor is compensated across the entire temperature range, providing excellent long-term stability. The 23SY-Ei-H2 series is a reliable solution equipped with long life, high precision, and safety, meeting various hydrogen requirements. 【Features】 〇 Adoption of stainless steel with increased nickel content as a measure against hydrogen embrittlement 〇 Use of gold-plated diaphragm widely used in hydrogen applications to minimize hydrogen diffusion 〇 Achieves ±0.7% accuracy within -10 to 80°C 〇 Excellent long-term stability 〇 Welded structure without internal seals 〇 Available in intrinsically safe explosion-proof type (23SY-Ei-H2)

The 23SX-H2 series is characterized by a low embrittlement rate due to an increased nickel content in the stainless steel used. The gold-plated diaphragm minimizes the diffusion of H2. Additionally, the pressure sensor is compensated across the entire temperature range and has excellent long-term stability. The 23SX-H2 series is a reliable solution that offers long life, high precision, and safety, meeting all hydrogen requirements. 【Features】 〇 Adoption of stainless steel with increased nickel content as a countermeasure against hydrogen embrittlement 〇 Use of gold-plated diaphragm widely used in hydrogen applications to minimize hydrogen diffusion 〇 Achieves ±0.25% accuracy within -10 to 80℃ 〇 Standard equipped with two outputs: digital RS485 and analog output 〇 Analog output can be range-changed via digital RS485 〇 Excellent long-term stability 〇 Welded structure without internal seals 〇 Available in intrinsically safe explosion-proof type (33X-Ei-H2)

The pressure sensor series 21C outputs an analog 0.5 to 4.5V in a ratiometric manner. It can combine measurement cells using chip-in-oil technology with various electrical and pressure connections, making it suitable for industrial applications. It is resistant to external influences and can provide highly accurate measurements over a temperature range of -40°C to 125°C. The pressure range covers from 0 to 0.2MPa to 0 to 100MPa! 【Features】 - Inexpensive, ultra-compact pressure sensor - Welded structure without internal seals; wetted/gas contact materials are SUS316L + Viton O-ring - High precision, wide temperature range (-40 to 125°C), excellent long-term stability, no hysteresis - Ratiometric signal output of 0.5 to 4.5V, power supply voltage 5V - Pressure range: from 0 to 0.2MPa to 0 to 100MPa - Ideal for small, low-power applications!

The pressure sensor series 21Y features a welded structure that does not use internal seals. It has an insulation voltage of 300VDC, making it less susceptible to disturbances. A temperature sensor is integrated into the circuit to correct output errors caused by temperature changes, resulting in improved overall accuracy and TEB. 【Features】 • Wide range of temperature compensation • Ultra-compact, ideal for applications with limited installation space • Robust SUS housing • Excellent long-term stability 【Technology】 • Piezo-resistive pressure sensor • Welded structure without internal seals • Compact with analog output: 4–20mA, 0–10V, etc.

The welded structure small pressure sensor 23SY/25Y is designed to meet the advanced and diverse requirements of industrial applications, including pressure range, pressure connection, output signal, and electrical connection (25Y features a flush diaphragm structure). The modular concept allows for high flexibility in specifications and enables quick response times. A temperature sensor is integrated into the circuit, correcting errors caused by temperature changes and contributing to improved overall accuracy. We can also offer intrinsically safe explosion-proof types 23SYEi and 25YEi. 【Features】 - Wide temperature compensation: ± 0.7 %FS @ -10 ~ 80℃ - Minimum pressure range starting from 10 kPa - Excellent long-term stability - Robust SUS housing - Option: Intrinsically safe explosion-proof type (23SY-Ei) 【Technology】 - Piezo-resistive pressure sensor - Welded structure without internal seals - Analog output: 4 ~ 20 mA, 0 ~ 5 V, 0 ~ 10 V, etc.

The capacitive pressure sensor series 41X is designed to measure gauge pressure in low pressure ranges. Through a mathematical correction method, it achieves high accuracy of ±0.2 to 0.3% FS even in low pressure measurements within a temperature range of 10 to 50°C. In addition to a digital RS485 interface, analog current or voltage outputs are also available. 【Features】 - Although calibrated in the 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 software CCS30 and converter K-114, pressure values can be displayed on a PC. Recording of pressure signals and graphic display, as well as zero adjustment, are also possible. - Up to 128 transmitters can be connected to the bus system. - Intrinsically safe explosion-proof type 41X-Ei / differential pressure type PD-41X.

The small pressure sensor M5 is named after its thin M5 screw at the sensor head. This compact head allows for measurements in narrow pipelines and hard-to-access locations. It has the capability to measure media up to 180°C in a dynamic range of 0 to 50 kHz, not only static pressure, and can also capture data from high-speed pulsations. 【Features】 〇 Sensor head withstands temperatures up to 180 °C 〇 Wide temperature compensation range, selectable from -20 to 125 °C or -40 to 180 °C 〇 Excellent dynamic response up to 50 kHz (suitable for measuring pulsations and unsteady behaviors) 〇 Resistant to impacts and vibrations 〇 Compact design, pressure connection is M5 x 0.5 fine thread 〇 IP67 ferrule with Teflon FEP cable (ideal for use in test benches)

The ultra-high-speed pressure sensor M5HB can measure not only static pressure but also pressure changes within a bandwidth of 0 to 50 kHz. This is achieved by the digital circuit continuously adjusting the analog signal in real-time, with an output of 0 to 10V. The compact sensor head with M5 fine thread can be used at temperatures up to 180°C. It has a pressure resistance of up to five times the measurement range and is an excellent model for vibration resistance. 【Features】 - Temperature resistance of the sensor head: 180°C - Output is an analog signal of 0 to 10V (with built-in amplifier) - Wide temperature compensation range: -20 to 125°C or -40 to 180°C - Bandwidth of 50kHz, ideal for measuring pulsations and unsteady behavior - Resistant to impacts and vibrations - Compact design, pressure connection is M5×0.5 fine thread

The ultra-high-speed pressure sensor M8coolHB can measure not only static pressure but also pressure changes within a bandwidth of 0 to 50 kHz. This is achieved by the digital circuit continuously adjusting the analog signal in real-time, with an output of 0 to 10V. The compact sensor head with M8 fine thread can be used at temperatures up to 1000°C due to cooling, and it has a pressure resistance of up to five times the maximum measurement range. It also has excellent vibration resistance. 【Features】 • The sensor head is heat-resistant up to 200°C and can be used at media temperatures up to 1000°C with cooling (air-cooled or water-cooled) • Output is an analog signal of 0 to 10V (with built-in amplifier) • Internal cooling channels function more efficiently than conventional cooling adapters • Wide temperature compensation range: -40 to 180°C • High-speed response up to 50kHz, ideal for measuring dynamic pressure (e.g., pulsations and unsteady behavior) • Resistant to the effects of vibration and shock • Pressure connection uses M8×0.75 fine thread, very compact size • Teflon FEP cable with IP67 ferrule, perfect for engine test bench applications • Pressure range: 300kPa, 1MPa, 3MPa (absolute pressure)

The Valueline pressure sensor achieves high accuracy of ±0.1% FS (with an optional ±0.05% FS) and can be obtained in a short delivery time of about 1 to 2 weeks after ordering (limited to standard specifications). It outputs analog signals of 4-20mA, 0-5V, or 0-10V. It is certified to NSF/ANSI 61 and 372 standards, making it suitable for drinking water applications. Additionally, the 4-20mA output can be selected with a built-in lightning protection device to protect against damage from electrical surges. The wetted/gas contact parts are made of SUS316L with a welded structure, and can be changed to titanium as an option. 【Features】 〇 Can be shipped in as little as 1 to 2 weeks after ordering (limited to standard specifications) 〇 High accuracy: ±0.1% FS (with an optional ±0.05% FS) 〇 Analog signal output (selectable from 4-20mA, 0-5V, 0-10V) 〇 Welded structure without internal O-rings 〇 Made of SUS316L with excellent corrosion resistance (titanium option available) 〇 Certified to NSF61/NSF372, making it suitable for drinking water use

The Preciseline pressure sensor achieves high accuracy of ±0.1% FS (±0.05% FS as an option) and can be obtained in a short delivery time of about 1 to 2 weeks after ordering (limited to standard specifications). In addition to standard analog outputs of 4-20mA, 0-5V, and 0-10V, it also comes with RS485 digital output, allowing for the connection of up to 128 Preciseline sensors on a single bus. It is certified to NSF/ANSI standards 61 and 372, making it suitable for drinking water applications. Furthermore, the 4-20mA output can be selected with an internal lightning protection device to safeguard against damage from electrical surges. Zero and full-scale adjustments are also possible via digital signals (using software CCS30). The wetted parts are made of SUS316L with a welded structure, and can be changed to titanium as an option. 【Features】 〇 Can be shipped in as little as 1 to 2 weeks after ordering (limited to standard specifications) 〇 High accuracy: ±0.1% FS (±0.05% FS as an option) 〇 Standard dual outputs of digital RS485 and analog output 〇 Zero and range adjustments possible via digital signals 〇 Excellent corrosion resistance with SUS316L construction

The Series 21PY is an ultra-compact pressure sensor with a diameter of just 14mm and a weight of less than 23g, featuring an output range of 0.5 to 4.5V and an integrated amplifier. 【Features】 〇 Miniature pressure sensor using piezoresistive technology: 14mm diameter, under 23g weight 〇 Welded structure without internal seals 〇 Wide temperature compensation: ± 1.5 %FS @ -10 to 80 °C 〇 Excellent long-term stability

【Features】 - Accuracy of ±0.1% FS over a temperature range of -10 to 80℃ - Standard dual outputs of digital RS485 and analog output - Excellent long-term stability - Welded flush diaphragm 【Technology】 - Piezo-resistive pressure sensor - Correction technology using a mathematical model for accurate pressure values - Ideal for mounting with O-rings

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.

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.

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.

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)

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.

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

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