Setra Corporation Ultra Clean Pressure Sensor Model 225 Series
225 series
Capacitive pressure sensor developed for special gas applications.
The Model 225 from Setra is a capacitive pressure sensor developed for special gas applications. It has a structure that is resistant to influences such as torque stress during piping, temperature changes due to low-temperature gas flow, and external high-frequency noise.
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basic information
The dead space is small at 1.8 mL, making purging easy. The gas contact part is made of SUS316L VAR material and has undergone electrolytic polishing treatment to a surface roughness of 0.18 Ra, with helium leak testing performed on all products. It features a sliding cover that allows for easy adjustment of zero and span. It detects slight changes in diaphragm capacitance and converts them into a high-precision linear DC electrical signal using a custom IC based on a unique charge balance principle. Electrical connections are provided via a 1.8 m multi-core cable or a 4-pin plug connector.
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Applications/Examples of results
Applications and Features ○ Special gas, high-purity gas supply system ○ Gas cabinet ○ Excimer laser supply equipment ○ Semiconductor process ○ Pressure modes include gauge pressure, differential pressure, and absolute pressure ○ Low cost and high precision ○ CE mark compliant
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Company information
Air Water Mechatronics Co., Ltd. ST Division handles excellent measurement/control equipment focused on the most important themes of pressure and flow in the field of measurement and control in the industrial sector. In pressure measurement, as the Japanese distributor for Setra Systems, we have supplied numerous pressure sensors domestically for many years. Setra's pressure sensors are characterized by high precision and sensitivity, and are used in many advanced technologies, including semiconductor manufacturing equipment. Additionally, to accommodate various industrial pressure measurement scenarios, we also handle products from companies such as BD and Honeywell. We manufacture digital pressure gauges that incorporate or externally attach these pressure sensors. Within our company, various pressure standards with traceability to national standards are installed in a strictly air-conditioned calibration inspection room, allowing us to conduct inspections and recalibrations in-house. Regarding flow measurement, we offer unique and high-value-added products for both liquid and gas (mass flow). For liquids, we primarily provide small, cost-effective, and highly accurate turbine flow meters, as well as Coriolis flow meters. We respond to diverse needs with disposable sensors for pharmaceutical and medical manufacturing, as well as certified sensors for food and beverage applications.