The Series 902B Piezo transducer is based on a silicon piezo resistive pressure sensor that measures absolute vacuum pressure with an accuracy of ±1% of Reading (from 10-1000 Torr). The sensor is robust and resistant to mechanical vibration and g-forces. Furthermore, the sensor technology makes the transducer gas type independent. With only stainless steel 316 exposed to the process gas, the transducer can be used in many demanding applications.

The 902B is available with an RS232 or RS485 digital communication interface for setup of transducer parameters and to provide real time pressure measurement. In addition, the 902B has a 16 bit analog pressure output that can be interfaced to external analog equipment for pressure readout or close loop control. The standard output is linear from 0-10 VDC, but other outputs are also available.

The 902B has up to three mechanical relays which can be used for process control, for example interlocking isolation valves and vacuum pumps. The SPDT relays include both normally open and close contacts and can be set to energize above or below a set point trip value. Many applications require continuous surveillance of system pressure and warning of atypical pressure levels. The flexible relay options of the 902B can provide warning to external safety logic in cases of abnormal pressure and loss of power

The compact design of the 902B significantly reduces the amount of space occupied by the transducer. This is particularly appealing to system designers and allows design of compact systems or equipment. The 902B is also available in a 9 pin version, offering backward compatibility with the first generation 902.