• Digital Communication
    EtherCAT, RS485/RS232
  • Sensor
    Stainless steel enclosed Piezo (Absolute Pressure)
  • Relays
    One to three relays SPDT (Optional)
  • Installation Orientation
  • Measurement Range
    0.1 to 1000 Torr
  • Set Point Range
    1 to 1000 Torr
  • Operating Temperature
    0 to 40°C (32 to 104°F)
  • Maximum Bakeout Temperature
    100°C (non-operating)
  • Digital Controls
    Zero adjust, span adjust, analog output, pressure units, baud rate, address, factory default, set point functions: value, hysteresis, direction, enable
  • Digital Status
    Pressure reading, units, set point, operating time, transducer temperature, user tag, model, device type, serial number, firmware and hardware versions, part number, manufacturer
  • Analog Output Resolution
    16 bit (Primary) 12 bit (Secondary)
  • Relay Contact Rating
    1 A @ 30 VAC/VDC resistive
  • Relay Response
    100 ms maximum
  • Power Requirements
    9 to 30 VDC <1.2 watt maximum
  • Accuracy
    100-1000 Torr: ±1% of Reading
  • Repeatability
    ±0.3% of Reading
  • Overpressure Limit
    1500 Torr
  • Internal Volume
    1.023 cc (KF16)
  • Exposed Materials
    316 Stainless Steel
  • Electronic Casing and Flange
    304 Stainless Steel
  • Weight
    0.37 lb (170 g) with KF16 flange
  • Compliance
  • Digital Output Resolution
    0.1 Torr
  • Zero Temperature Coefficient
    0.01% of Full Scale/°C
  • Span Temperature Coefficient
    0.02% of Reading/°C


Piezo Absolute Pressure Transducer

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 100-1000 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.

Digital and Analog Interfaces

The 902B is available with EtherCAT, 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.

Process Control Relays

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

Compact Design

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.

Optional Integrated Touch-screen Display

The optional integrated touch-screen display is user configurable; the user can change pressure units, orientation and has access to set point parameters as well as gas type. The display also indicates the status of the available set point relays. Displayed pressure reading from individual sensors or combined reading can be seen from >5 meters away on the high contrast display.

PDR900 Power Supply & Display

The PDR900 power supply and readout unit is a stand alone, single channel controller for use with the Series 900 digital vacuum transducers. It can be used as a stand-alone power supply readout unit or as a tool for configuration, calibration and diagnostics of system integrated transducers in OEM applications.

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