Install Instructions

Series DX Differential Pressure Switch
Specications - Installation and Operating Instructions
Bulletin IN-DX
The SERIES DX is a pressure switch that makes a contact output based on the
differential pressure between two pressure sources. Unit incorporates a SPDT snap
switch in a weatherproof, type 4X enclosure. Series DX features low differential
pressure set points with high single pressure limit.
OPERATING PRINCIPLE
The DX uses opposing diaphragms to sense the high and low pressure. A pivot
mechanism transfers the difference of the two pressures to the switch.
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).
Enclosure Rating: Weatherproof UL type 4X (IP65).
Repeatability: ±2% of full range.
Switch Type: SPDT snap switch.
Electrical Rating: 5A @ 125/250 VAC (~), 5A 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. Continuous single side only pressure
should not exceed 1.25 x full differential range.
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).
Agency Approvals: CE, UL.
59/64
[23.50]
4-29/64
[113.03]
47/64
[18.80]
3/4
[19.05]
1-13/16
[46.05]
13/64
[5.08]
2-1/2
[63.50]
15/64
[6.00]
1-13/32
[35.56]
35/64
[13.97]
2X
47/64
[18.54]
1-27/64
[36.30]
2-55/64
[72.59]
1-11/32
[34.04]
9/16
[14.10]
1-13/64
[45.85]
Adjustable Range
psid (bar)
Fixed Deadband
psid (bar)
At Low Set Point At High Set Point
2.5 to 10 (0.17 to 0.69)
10 to 25 (0.69 to 1.72)
25 to 50 (1.72 to 3.45)
50 to 75 (3.46 to 5.17)
1.5 (0.10)
2.5 (0.17)
3.5 (0.24)
6.0 (0.41)
2.5 (0.17)
3.5 (0.24)
6.0 (0.41)
8.0 (0.55)
Example DX W 1 1 153 2 DXW-11-153-2-M
Series DX Differential Pressure
Switch
Construction W Weatherproof
Wetted Materials 1 Brass/Fluoroelastomer
Process Connection 1 1/4˝ NPT
Circuit Options 153 SPDT
Range 1
2
3
4
2.5 to 10 psi
10 to 25 psi
25 to 50 psi
50 to 75 psi
Options SST
PRESET
Stainless Steel tag
Preset set point
Approximate Deadbands
®
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: [phone]
Fax: [phone]
www.dwyer-inst.com
e-mail: [e-mail]