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Differential & Digitally Compensated
High Accuracy Serial Pressure Transducer

The P855 is a digitally compensated differential pressure transmitter designed for industrial pressure measurement applications. The on-board microprocessor provides high accuracy and improved stability in changing thermal environments.

The P855 is designed for a wide variety of low pressure measurements where fast dynamic response, high resistance to vibration and superior signal stability through temperature change is required. The P855 will accept both liquids and gases directly at the sensing diaphragm.

The zero and full-scale outputs are set by switch. No potentiometer adjustments are required to calibrate. A second switch provides 2.5x gain change and this smaller range may be offset to any  place within the full range.  The P855 has 1/8 inch female NPT pressure connections and measures just 1.5 x 1.5 x 5 inches overall.

The P855 is available in two output configurations: 4-20 mA current sink output and +/-5 VDC output. The 4-20 mA output version is a true two-wire system that will operate over a supply voltage of 9 to 55 Vdc.

Wiring options for the P855 include a six-pin PT02A connector and pigtail leads. A 1/2 inch male NPT conduit thread connection for mounting a junction box is included with the pigtail lead option.

The P855 is Ideal for:

• Flow Measurements
• Level Measurements
• Hydraulic Systems
• Vehicle Testing


  • RS485 Serial interface for digital operation
  • Digitally compensated for high accuracy
  • Excellent stability over wide thermal range
  • 0.1% Full scale accuracy, 0.25% Max temperature error
  • Zero, Span set by switches – No potentiometers
  • For liquid or gas service
  • Full scale ranges from 2.22 inH2O
  • NEMA 4 Housing