Dwyer Instruments SERIES CXA Data Sheet
®
DWYER INSTRUMENTS, INC.
SERIES CXA | MERCOID® WATER PUMP PRESSURE SWITCH
FEATURES/BENEFITS
• The set point and deadband are both easily adjustable reducing time to
install and operation
• Mounting in any position and feature simple makes a reliable switch that
can be installed by any skill level
APPLICATIONS
• Water system applications
• Electric water pumps
• Well pumps
• Pumping systems
DESCRIPTION
The SERIES CXA Water Pump Pressure Switches have been proven reliable for controlling
automatic water systems. These switches are very popular for use on water well pumps
and pumping systems. The set point and deadband are both easily adjustable via screws
inside the cover. For ease of installation, the switches come with a 1/4˝ female NPT process
connection and can be mounted in any orientation. The series CXA’s simple design makes it
a great switch for an installer at any skill level.
SPECIFICATIONS
Service Compatible liquids and gases.
Wetted Materials Silicone, steel, and SS.
Temperature Limits 140°F (60°C).
Pressure Limits See model chart on catalog page.
Enclosure Rating General purpose.
Repeatability ±5 psig (±0.3 bar).
Switch Type DPST snap action (see model chart on catalog page).
Electrical Ratings 20 A @ 120 VAC, 12 A @ 240 VAC, 9.6 A @ 240 VAC (3 phase), 8.6 A @ 32 VDC, 3.1 A @ 120 VDC, 1.6 A @ 240 VDC.
Electrical Connections Screw terminal.
Conduit Connection 7/8˝ hole for 1/2˝ conduit hub (2 places).
Mounting Orientation Switch can be installed in any position.
Set Point Adjustment Internal screws.
Deadband See model chart on catalog page.
Weight 0.75 lb (0.34 kg).
Agency Approvals CE.
®
DWYER INSTRUMENTS, INC.
DIMENSIONS WIRING DIAGRAM
[57.6]
[85.5]
3-45/64 [94]2-9/16 [65]
SUPPLY
TO
TURN CLOCKWISE TO
TURN
3-3/8
2-17/64
CLOCKWISE
INCREASE
BOTH
CUT-OUT
AND CUT-IN
PRESSURE
POWER SUPPLY
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
CXA -R 1
SERIES
CXA: Water pump pressure switch
SWITCH TYPE
-R: NO
-S: NC
INCREASE CUT-OUT
PRESSURE WITHOUT
AFFECTING CUT-IN
TURN
CLOCKWISE
TO INCREASE
BOTH
CUT-OUT
AND CUT-IN
PRESSURE
RANGE
1: 15 to 80 psig (1.0 to 5.5 bar)
2: 30 to 100 psig (2.1 to 639 bar)
3: 35 to 150 psig (2.4 to 10.3 bar)
POWER
TURN CLOCKWISE
TO INCREASE
CUT-OUT PRESSURE
WITHOUT AFFECTING
CUT-IN
ACCESSORIES
Model Description
GCK-200CO-2000CO2
A-449
A-449A
A-CDT-KIT
Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the
latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
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