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General Electric Industrial Systems



The GE General Eastern room pressure monitor takes advantage of our time-proven sensor technology to monitor, alarm and/or
control critical room to room differential pressures. The same instrument monitors either positive or negative room

Monitoring of hospital rooms such as operating rooms and isolation rooms for housing contagious patients is a typical application. Other applications requiring differential pressure 'N'2 monitoring are: fume hoods, clean rooms, computer rooms, asbestos abatement projects etc. This monitor is extremely sensitive and performs reliably at very low room pressures. It is easily mounted on a wall and the installer has the choice of rear or bottom knockouts for electrical and pressure connections. All electrical and mechanical components are housed in a tough polycarbonate NEMA type 13 (IEC529, IP65) enclosure with a clear, gasket polycarbonate cover for easy viewing of display and room status.

Pressure is displayed on the front panel with a resolution of 0.001' of water (or 0.1 Pascal), The unit measures positive or negative pressure. A minus sign indicates a negative room pressure, Next to the digital display, a small light indicates the selected unit of measurement (either inches of water or Pascal). A bright red and a bright green LED alert
those approaching of the status of the room. The pressure at which the lights change state can be adjusted from the front panel.

The room pressure monitor comes standard with a SPDT relay (for supplemental controls such as audible alarm or 
remote status indication), and 3 analog output signals, 0 to 5 Vdc, 0 to 10 Vdc and 4 to 20 mA. These analog outputs 
are proportional to the room pressure.

A selector switch allows field setup for either 120 Vac or 240 Vac 50/60Hz service. 24 Vac operation is optional. 


Accuracy of reading:  +-1% FS 
Accuracy of alarm output:  +-1 % of setpoint (lights and relay)
Standard range:  +-0.1 inches of water (or +-25Pascals).
Resolution:  0.001" of water (or 0.1 Pascal).
Optional ranges:  +-0,5, +-0.1, +-5.0, +-10.0 inches of water
Panel indicator lights: one red & one green LED.
Display:  LCD, 3 digits, 0.5" digit height
Alarm output:  SPDT relay, contacts rated at 5A at 30 Vdc or 120 Vac, 4A at 240 Vac, resistive.
Deadband:  preset at 5% of range, field adjustable from 1 to 20%

Analog outputs:
0 - 5Vdc, 2.5V at zero pressure, 2 mA max
0 - 1OVdc, 5V at zero pressure, 2 mA max
4 - 20mA sourcing, l2mA at zero pressure, max loop resistance is 580 Ohms.


Power requirements: 95-135/190-270 Vac, 50/60 Hz or 19.5 to 30 Vac, 50/60 Hz
Max power consumption: 5 Watts.
Electrical connections: 3/4" terminal strip with # 6 screws.
Operating medium: air or non-corrosive, non-explosive gas.
Maximum momentary pressure limit:  +-6.0 inches of water (+-kPa).

Color:  light gray
Construction: glass filled polycarbonate, flammability rating of UL94 V-1
Cover: clear polycarbonate, flammability rating of UL94 V2
Knockouts: 6 in lower front & 5 in back of enclosure
Hinges: strong & removable, allow hinging from either side, open 180 o
Mounting: 3-point mounting
Operating temperature:  0oC to 50oC (32oF to 12oF).
Storage temperature:  -30oC to 70oC (-20oF to 160oF).
Effect of temperature on reading:  +-0.05%/oC.
Operating humidity range: 10% to 90% R.H.
Physical dimensions:  see outline drawing.
Weight:  2.56 lb (1160g).