KELLER Pressure Japan Product Lineup

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

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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)

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The LD series pressure sensors utilize proprietary chip-in-oil technology. They are all-in-one sensors that house the measurement cell, digital temperature compensation circuit, and signal processing circuit in a compact housing made of stainless steel or Hastelloy. With excellent environmental resistance, they output highly accurate measurement results as digital signals (pressure and temperature information). Featuring an I2C interface and a low supply voltage specification of 1.8 to 3.6V, they are easy to integrate into microcontroller-based systems. The LD series, with its very low power consumption and digital output, is ideal for battery-operated devices and IoT solutions. **Features** • Ultra-low power consumption, perfect for battery-operated applications • Sealed and protected sensor electronics - extremely resistant to environmental influences • Ultra-compact and robust housing made of SUS (Hastelloy C-276 available as an option) • No external electronics needed for compensation or signal processing • High precision, excellent long-term stability, no hysteresis • Easy integration into microcontroller-based systems • High flexibility in use due to the pressure sensor part and signal processing electronics being handled by two chips

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The LC series pressure sensors utilize proprietary chip-in-oil technology. They are all-in-one sensors that house the measurement cell, digital temperature compensation circuit, and signal processing circuit in a compact stainless steel or Hastelloy housing. They offer excellent environmental resistance and output mathematically compensated measurement results as an analog 0.5 to 4.5V ratiometric output signal across a wide temperature range of -40 to 150°C. 【Features】 - Sealed and protected sensor electronics - resistant to environmental influences - Operating temperature: up to 150°C - Ultra-compact and robust housing made of SUS (Hastelloy C-276 available as an option) - No external electronics required for compensation or signal processing - High precision, excellent long-term stability, no hysteresis - Pressure range: 1 to 1000 bar (0.1 to 100 MPa) - Easy integration into the overall system - High flexibility in use due to the pressure sensor part and signal processing electronics being handled by two chips - Wiring options include pin output, wire output, and socket types

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The pressure sensor series 33X-Ed achieves an extremely high accuracy of 0.05% full scale (FS) using a mathematical correction method. Moreover, this accuracy is compensated within a temperature range of 10 to 40°C. If an additional option is selected, a high precision of 0.01% FS (or that accuracy if calibrated at an accredited test lab) can be achieved. In addition to a digital RS485 interface, analog current or voltage outputs are also available. The 35X-Ed features a G1/2 flush diaphragm structure for pressure connection. Pressure-resistant explosion-proof housing – suitable for use in explosive atmospheres. Various options are also available, including pressure connections, electrical connections, port shapes, outputs, connection materials, oil filling, oxygen compatibility, special specifications, and more. We also offer license-free software CCS30 for the RS485 interface. 【Features】 - Compact design despite being explosion-proof - Welded structure without internal seals - Analog signal output of 4-20mA or 0-10V in addition to digital RS485 - G1/2 flush diaphragm type also available (35X-Ed)

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The pressure sensor series 23-Ed is designed for industrial applications and is based on the 10L series pressure transducer, which has long-term stability and features an analog circuit. The modular concept allows this series to flexibly accommodate pressure connections and electrical connections according to customer preferences. The 25-Ed has a G1/2 flush diaphragm structure for pressure connection. Pressure-resistant explosion-proof housing – suitable for use in explosive atmospheres. Various options are also available, including pressure connections, electrical connections, port shapes, outputs, connection materials, oil filling, oxygen compatibility, and special specifications. 【Features】 - Achieves miniaturization while being pressure-resistant and explosion-proof - Welded structure without internal seals - Analog signal output of 4–20mA or 0–10V - G1/2 flush diaphragm type also available (25-Ed)

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The capacitive pressure sensor series 41X-Ei 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 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 to 10 kPa/output 4 to 20 mA → pressure range 2 to 6 kPa/output 4 to 20 mA). - Using software CCS30 and converter K-114, pressure values can be displayed on a PC, allowing for recording of pressure signals, graphical display, and zero adjustment. - Up to 128 transmitters can be connected to the bus system. - Intrinsically safe explosion-proof type.

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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.

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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.

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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!

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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!

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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

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The intrinsically safe explosion-proof small pressure sensor 23SYEi/25YEi is designed to meet advanced and diverse requirements in industrial applications, including pressure range, pressure connection, output signal, and electrical connection (25Y features a flush diaphragm structure; see the second photo). With a modular concept, this series offers high flexibility in specifications and can respond quickly with short lead times. A temperature sensor is integrated into the circuit, correcting errors due to temperature changes and contributing to improved overall accuracy. Standard types (non-explosion-proof types) 23SY and 25Y are also available. 【Features】 - Wide temperature compensation: ± 0.7 %FS @ -10 ~ 80℃ - Minimum pressure range starting from 10 kPa - Excellent long-term stability - Robust SUS housing 【Technology】 - Piezo-resistive pressure sensor - Welded structure without internal seals - Analog output: 4 ~ 20 mA, 0 ~ 5 V, 0 ~ 10 V, etc.

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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.

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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

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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)

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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

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