The model ASM measures gauge pressure, absolute pressure, and negative pressure with high precision of ±0.05% FS. It has excellent temperature characteristics and achieves high stability over the long term.
The highest precision pressure sensor ASM series from Setra Corporation enables accurate measurements of gauge pressure, absolute pressure, and negative pressure for gases and liquids suitable for a 630 stainless steel pressure port, with an accuracy of ±0.05% FS. The patented sensor structure employs a resonant variable capacitance method, achieving excellent linearity and long-term stability. It has a wide temperature range, and errors due to temperature effects are meticulously compensated and minimized. The diaphragm features an overpressure stop protection mechanism, providing a safe design against unintended rapid pressure increases. The unique high-level sensor output signal is characterized by excellent stability, accuracy, low output noise, and fast dynamic response, making it suitable for many industrial applications, laboratory measurements, and control purposes. This model is manufactured by combining Setra's proprietary electronic circuit with a robust integrated silicon resonant capacitive sensor. The central part of the pressure port has a diaphragm structure, with an insulated electrode plate fixed at the center of the diaphragm, creating variable capacitance. Changes in pressure alter the minute gap between the insulated electrode and the diaphragm, resulting in changes in capacitance, which are detected and converted into a linear DC signal by the electronic circuit.
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