Dwyer Series PQ Ultra Sensitive Pressure Switches
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| 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.
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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 |
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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. |
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