Devar - Model 18-268B -Two Wire Pressure Transmitter

The DEVAR Model 18-268B is a two-wire pneumatic to current transmitter. It accepts a pressure input and provides a proportional 4 to 20 milliamp output. This transmitter features a piezoresistive silicon, pressure transducer, which provides excellent signal conversion and long term stability. The transducer includes laser-trimmed resistors, which provide temperature compensation over a range of 0 to 50 °C as well as interchangeability of ±1%. The pressure transducer is unaffected by vibration and does not consume signal air. All internal parts which come in contact with the input media are either silicon or gold plated kovar. The 18-268B provides easily accessible span and zero pots for calibration as well as a linearity pot which is used to calibrate out any nonlinearity which might be present in the pressure transducer. Other features of the 18-268B include effective RFI protection in the 20 to 500 MHz frequency range and a rugged die cast aluminum NEMA 4X enclosure.