The PM277 converts differential air pressure to an analog output and provides a relay contact • Robust piezoresistive silicon pressure sensor for high accuracy and long life • Wide pressure range from 0.3 psi to 30 psi (2 kPa to 200 kPa) • Option for open collector transistor output instead of relay contact • Low range AC or DC voltage power supplies Common applications include • Ventilation system monitoring • Pressure monitoring & control in clean rooms • Control of process air systems