KELLER Pressure Japan List of Products and Services

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

• Pressure

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

• Pressure

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)

• Pressure

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

• Pressure