Dwyer Sales Department: 1-201-419-6111 ext. 26 for Sales Group  |  dwyer@nciweb.com


Dwyer Series PQ Ultra Sensitive Pressure Switches

Large Diaphragm, Magnetic Mercury Switch
An ultra sensitive pressure switch, Model PQ is designed for use on air or non-corrosive gas applications. Large diaphragm operates special magnetic mercury switch. Operating point is adjustable over entire range. Unit is also available in weather-proof or explosion-proof housing.

-- PHYSICAL DATA
Temperature Limits:-10 to 180F. (-23.3 to 82.2°C)
Pressure Connections:1/8" N.P.T. Female.
Electrical Raging:0.3A @ 115 VAC, 0.15A @ 230VAC, 0.9A @ 24 VAC, 0.15A @ 115VDC, 0.07A @ 230VDC
Conduit Opening:½"
Wiring Connections:Two screw type
Circuit Type:SPST. Model PQ-3-XX closes on increase of pressure or decrease of vacuum. For circuit to open on increase of pressure or decrease or vacuum, specify Model No. PQ-2-XX
Setpoint Adjustment: Internal screw
Housing :Pointed steel
Diaphragm: Nylon reinforced Buna-N
Calibration Spring:Plated steel
Weight:4 ½ lbs. (2.04 kg)
Installation: Must be vertical
-- MODELS NUMBERS (stock shown in bold)
Model
Number
Operating Range Max. Fixed Deadband Max. Surge Pressure
 PQ-3-X1  0-0.1" w.c.  0-0.1" w.c.  1.0" w.c.
 PQ-3-X2  0.1-6.0" w.c.  0.02" w.c.  10.0" w.c.
 PQ-3-X2.6  0.1-6.0" w.c.  0.02" w.c.  10.0" w.c.
 PQ-3-X3  1.0-30" w.c.  0.1-0.2" w.c.  60.0" w.c.
 PQ-3-X4  0-0.1" w.c. (vac.)  0.01" w.c.  1.0" w.c.
 PQ-3-X5  0.1-1.0" w.c. (vac.)  0.01-0.02" w.c.  10.0" w.c.
 PQ-3-X6  1.0-30" w.c. (vac.)  0.1-0.2" w.c.  60.0" w.c.