Fuel Cell Pressure Sensor Setra\'s high performance Model 203 fuel cell pressure sensor uses 316 stainless steel as wetted parts, making it suitable for use in hydrogen and other harsh chemical applications. The Model 203 sensor is encapsulated in a rugged stainless steel/polybutylene terephthalate housing, which is compact and lightweight, and can best reflect the adaptability of system design. The Model 203 sensor does not use seals or O-rings, thus eliminating the risk of leaks and ensuring excellent performance. This type of sensor has a wide operating temperature range of -40° F to 185° F, an accuracy of 0.25% FS, and a variety of options in reference pressure, range, output, and pressure and electrical connections, making it the best choice for a variety of applications. Each sensor is calibrated by Setra according to NIST standards and temperature compensated. Working Principle Setra\'s patented variable capacitance sensing element design combines the characteristics of lightness, accuracy and excellent thermal stability. It uses a fully welded stainless steel diaphragm and insulated electrodes, which together form a variable capacitor that changes capacitance as pressure increases or decreases. This change in capacitance is detected and converted into a modulated linear current output signal.
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