The Dwyer Instruments ADPS is an adjustable differential pressure switch with a selectable set point and adjustment dial. It has SPDT switches rated for various voltages and amperages, plastic construction, and is available in multiple pressure ranges for applications such as monitoring air filters and ducts. The document provides information on features, specifications, ranges, applications, ordering, and contact details.

1. ADPS Adjustable Differential
Pressure Switches
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©Copyright 2011 Dwyer Instruments, Inc.

2. Features of the ADPS
Selectable Set Point with Adjustment Dial
Dial Shows both Inches W.C. & Pascal
Push-On Screw Terminal
Cable Gland or ½” Conduit Connection
All Plastic Construction
CE Approved
(UL Model in Development)

3. Specifications
SPDT Switch 1.5 Amp @ 250 VAC
Optional Gold Contact 0.4 Amp @ 250 VAC
40” w.c. (10 kPa) Maximum Pressure
Process Ambient Temperature Limits -4 to
185°F (-20 to 85°C)
Enclosure Rated NEMA 13 (IP54)

4. ADPS Ranges
0.08 to 0.80 in. w.c. (20-200 Pa)
0.12 to 1.60 in w.c. (30-400 Pa)
0.20 to 2.00 in w.c. (50-500 Pa)
0.80 to 4.00 in w.c. (200-1000 Pa)
2.00 to 10.00 in w.c. (500-2500 Pa)
4.00 to 16.00 in w.c. (1000-4000 Pa)

5. Typical Applications
Monitoring Air Filters & Ventilators.
Monitoring Industrial Cooling-Air Circuits.
Overheating Protection for Fan Heaters.
Monitoring Flows in Ventilation Ducts.
Controlling Air & Fire-Protection Dampers.
Frost Protection for Heat Exchanges.

6. ADPS Pressure Switch in AHU

7. Ordering
ADPS-xx-2-N
-xx = Range -01 to -07
-2 = Cable Gland ; Change to -1 for Conduit
-N = 1.5 Amp Contact ; Change to L for Gold
Note: Add –C to End of Model for Installer
Kit. Includes 2 Static Fittings & Tubing

8. Questions
To order a free catalog or for more information contact;
Dwyer Instruments, Inc., P.O. Box 373,
Michigan City, IN., 46361
Telephone: (800) 872-9141 or (219) 879-8000
Fax: (219) 872-9057
Internet address: www.dwyer-inst.com
E-mail: info@dwyer-inst.com