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Omega PSW20 Series Instruction Sheet

Pressure, vacuum or differential pressure switches
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PSW20 Series
Pressure, vacuum or differential pressure switches
INSTRUCTION
SHEET
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For latest product manuals: omegamanual.info
Installation Instructions for OMEGA PSW20 Series: Pressure, Vacuum and Differential
General
The PSW20 series is single pole switch that can be used as a pressure or vacuum switch (from 0.40 in W. C. to
20 inches W. C.) or as a pressure differential switch. The switch can respond to rapid pulsing and the gold
plated silver contacts will handle low level switching currents.
Mounting Instructions
Switch may be mounted in horizontal or vertical position, through 0.12" (3mm) holes on 1.34" (34mm)
centerline, with suitable clearances to accommodate 0.15" I.D tubing and electrical connectors – see diagram
for dimensions.
Electrical, Pneumatic and Material/Mechanical Specification
M4067-0504
Pressure Switches.
Part
Number
Pressure Vacuum Differential
PSW20A
0.4-15
PSW20B
1-20
Pressure range
(inches water, gauge)
0.4-15
.04-15
1-20
1-20

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  Summary of Contents for Omega PSW20 Series

  • Page 1 General The PSW20 series is single pole switch that can be used as a pressure or vacuum switch (from 0.40 in W. C. to 20 inches W. C.) or as a pressure differential switch. The switch can respond to rapid pulsing and the gold plated silver contacts will handle low level switching currents.
  • Page 2 Part Number PSW20A PSW20B Body Diaphragm Contacts Springs Terminals Adjusting screw Weight Operating temperature Listings Connections and Adjustment Pressure Switching – Normally Open Contacts Connect the pressure source to inlet port B (see diagram) and set the adjusting screw to the desired pressure. Turning the screw clockwise narrows the gap between contacts and decreases the pressure set point.
  • Page 3 Media in Contact with Electrical Contacts Note that the pressure media entering through Port A is in direct contact with the electrical contacts in the switch, whereas the pressure media entering through Port B is separated from the electrical contacts by the diaphragm.
  • Page 4 European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.