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®
SERIES DX | WET/WET DIFFERENTIAL PRESSURE SWITCH
BENEFITS/FEATURES
• Differential pressure switch that is suitable for most gas and water-based applications allows multiple uses in the most
sophisticated designs
• Weatherproof housing provides protection in the harsh, wet or dirty environments ensuring switch’s long-service life
• Removable terminal block reduces installation time
APPLICATIONS
• Indicating lter condition
• Proof of ow indicator monitoring
• Proving ow through a pump
• Proving ow through a chiller
• Proving ow through a heat pump or AC Unit
DESCRIPTION
The Series DX Wet/Wet Differential Pressure Switch is a differential
pressure switch that makes a contact output based on the differential
between two pressure sources. Wetted materials of brass and
ouroelastomer are suitable for use with most gases and water based
solutions. The switch can be used for low differential pressure indication
with set point on a decrease of pressure as low as 1 psid (0.07 bar).
Differential set point ranges are available from 2.5 to 75 psid (0.17 to 5.17
bar) on increasing differential pressure and 1.0 to 67 psid (0.07 to 4.62 bar)
on decreasing differential pressure. Unit features a high static pressure
rating of 200 psig (13.8 bar). Weatherproof, UL type 4X, enclosure for
dust laden, outdoor, or wash-down installation environments. Externally
adjustable set point, integral mounting ange and a removable electrical
terminal block for quick and easy installation.
SPECIFICATIONS
Service Compatible gases and liquids.
Wetted Materials Connection: Brass; Diaphragm: Fluoroelastomer.
Temperature Limits 30 to 140°F (-1 to 60°C).
Pressure Limits 200 psig (13.8 bar). Continuous single side only pressure should not exceed 1.25 x full differential pressure range.
Enclosure Rating Weatherproof UL type 4X (IP65).
Repeatability ±2% of full range.
Switch Type SPDT snap switch.
Electrical Rating 5 A @ 125/250 VAC, 5 A res. @ 30 VDC.
Electrical Connection Removable terminal block.
Conduit Connection 0.871˝ diameter hole for 1/2˝ conduit tting.
Process Connection 1/4˝ NPT female.
Mounting Orientation Ports on horizontal plane, ±10°.
Set Point Adjustment External screw.
Housing Materials Body: Aluminum; Housing: Polycarbonate; Cover: 300 SS.
Vibration and Shock Set point repeats after 2.5 Gs, 5 to 500 Hz, set point repeats after a 15 Gs, 10 millisecond duration.
Humidity Limit 80% (non-condensing).
Pollution Degree 2.
Environment Intended for indoor and outdoor use.
Weight 1 lb, 3 oz (0.54 kg).
Compliance CE, cULus.
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DIMENSIONS WIRING DIAGRAM
1-13/16
13/64
[5.08]
[46.05]
2-55/64
2
]
NC NO COM
INSIDE SWITCH HOUSING
59/64
[23.50]
3/4
[19.05]
[45.85]
1-13/16
47/64
[18.80]
4-29/64
[113.03]
2X 47/64
[18.54]
35/64
[13.97]
1-27/64
[36.30]
[72.59]
1-13/32
[35.56]
2-1/2
[63.50]
HOW TO ORDER
Use the bold characters from the chart below to construct a product code.
9/16
[14.10]
15/64
[6.00]
1-11/3
[34.04
VIEW OF TERMINAL BLOCK
SERIES
DX: Wet/wet differential pressure switch
CONSTRUCTION
W: Weatherproof
WETTED MATERIAL
-1: Brass/uoroelastomer
PROCESS CONNECTION
1: 1/4˝ female NPT
ACCESSORIES
Model Description
A-590 1/2˝ conduit plug, watertight
DX W -1 1 -153 -1 -ST
OPTIONS
-PRESET: Preset set point
-ST: Stainless steel tag
RANGE
-1: 2.5 to 10 psi
-2: 10 to 25 psi
-3: 25 to 50 psi
-4: 50 to 75 psi
CIRCUIT
-153: SPDT
DWYER INSTRUMENTS, LLC
©Copyright 2022 Dwyer Instruments, LLC
Printed in U.S.A. 12/22 DS-DX Rev. 1
Important Notice: Dwyer Instruments, LLC 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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