Pressure Sensor Employs Variable Capacitance

The model 720 is a low-cost, compact capacitance vacuum gauge (CVG) based on the companyÕs variable capacitive sensor design. It produces a 0 to 5 Vdc or 0 to 10 Vdc output that is linear with pressure and independent of gas composition. Standard accuracy is ±0.5% of reading, while an optional accuracy of ±0.25% of reading is available. The device, which is configured with a nine-pin D-sub connector, measures 1.5" in diameter and 2.06" long. It is offered in a variety of vacuum pressure ranges from 2 kPa to 150 kPA, 10 Torr to 1,000 Torr, and 10 Mb to 1,000 Mb. SETRA SYSTEMS INC., Boxborough, MA. (800) 257-3872.