Dwyer Instruments SERIES A1PS, SERIES A1VS Catalog Page
2.375
[92.08]
1/4 NPT
SERIES A1PS/A1VS
ECONOMICAL PRESSURE SWITCH
Vacuum and Compound Ranges Available, Adjustable Set Point
The Series A1PS/A1VS Economical Pressure Switch is designed with a 15 Amp
SPDT switch for direct control of pumps and motors. Available in pressure, vacuum,
or compound ranges, the switches offer a eld adjustable set point. Easily adjust the
switch by aligning the top of the self locking adjusting nut with the desired setting
indicated on the adjacent range scale. Connection is 1/4˝ male NPT for quick
installation and can be mounted in any position.
FEATURES/BENEFITS
• 15 A contact allows direct control reducing costs and reliability by having to introduce
additional contacts and relays
• Field adjustable reduces installation time bring application on-line faster
APPLICATIONS
• OEM
• Compressors
• Process equipment
• Motor control
• Pump control
SPECIFICATIONS
Service: Compatible liquids or gases.
Wetted Materials: Diaphragm: Buna-N;
Body with tting: Zinc alloy, chromate
nish.
Temperature Limits: -31 to 185°F (-35
to 85°C).
Pressure Limits: 600 psig.
Vacuum Limits: 29.9˝ Hg (vacuum and
compound models only).
Switch Type: SPDT snap action.
Electrical Ratings: 15 A (resistive) @
250 VAC, 1/2 HP @ 250 VAC.
[60.33]
3.625
Ø1.625
[41.28]
Electrical Connections: Three screw
terminals.
Process Connection: 1/4˝ male NPT.
Set Point: Field adjustable via knurled
screw cap.
Cycling: Not to exceed 1 Hz.
Sensor Element: Diaphragm.
Weight: 7.4 oz (209 g).
Agency Approvals: UL.
PRESSURE
MODEL CHART
Model
A1PS-14
A1PS-24
A1PS-34
A1PS-44
Set Point Range
(kPa)
1.5 to 3.5 psi (10 to 24)
3 to 40 psi (21 to 276)
30 to 150 psi (207 to 1034)
100 to 500 psi (689 to 3445)
Repeatability
(kPa)
±0.15 psi (1)
±1.0 psi (7)
±5.0 psi (34)
±20.0 psi (138)
Deadband
(approx.) (kPa) Model
0.5 to 1.7 psi (3 to 11)
2 to 5 psi (14 to 34)
5 to 30 psi (34 to 207)
30 to 120 psi (207 to 827)
A1VS-14
A1VS-24
Set Point Range
(kPa)
6-28˝ Hg (-20 to -94)
28˝ Hg to 3.5 psig (-94 to 24)
Repeatability
(kPa)
±1.2˝ Hg (-4)
±1.2˝ Hg (-4),
±0.15 psi (1)
Deadband
(approx.) (kPa)
3-14˝ Hg (-10 to -47)
6˝ Hg - 1.5 psi (-20 to 10)
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