1. Pressure and Flow Switches
used in BAS Applications
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customers and current employees as a resource only. They may not be reproduced, published, or
transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness,
product names, and logos, included within these compilations may not be used without specific, written
prior permission from Dwyer Instruments, Inc.
©Copyright 2011 Dwyer Instruments, Inc.

2. Series ADPS
Differential Pressure
Switch

3. Features of the Series ADPS
Six adjustable ranges
Visual indication of set point
NEMA 13/IP54 Rated enclosure
Rugged Poly Amide Housing
Gold contacts available
Economically priced

4. Series ADPS Ranges
20-200 Pascals (0.08-0.8"wc)
30-400 Pascals (0.12-1.60"wc)
50-500 Pascals (0.2-2.0"wc)
200-1000 Pascals (0.8-4.0"wc)
500-2500 Pascals (2.0-10.0"wc)
1000-4000 Pascals (4.0-16.0"wc)

5. Specifications
Service: Air & Compatible Gases
Temperature Limits: -4 to 185°F (-20 to 85 °C)
5/16" (8 mm) OD, 1/4" (6 mm) ID Tubing
M20 x 1.5 or 1/2" NPT
40"w.c. (10 kPa) Maximum Pressure
NEMA 13/IP54 Rated enclosure
CE approved

6. Applications
Cooling loop Coil Monitoring
Duct Pressure Monitoring
Fan Static Pressure
Filter Condition Monitoring

7. Series ADPS D. P. Switch

8. Model FS-2 Water Flow Switch

9. Features of the Series FS-2
Four vane sizes for different flow
set points and different size pipe
installations
Adjustable set point internally via
an adjustment screw
Rated IP64 (NEMA 4)
CE Approved

10. FS-2 Set Points

11. Specifications
Liquid use
Wetted Materials: tin-bronze, brass, SS
Temperature Limit: 110°C (230°F)
Pressure Limit: 10 bar (147psi)
Enclosure Rating: NEMA4/IP64 weatherproof
SPDT snap switch rated 10A @ 250 VAC
Process Connection: 1” male NPT or BSPT

12. Applications
Hot and Cold water supply to air
handler
Boilers
Commercial hot water heaters
Chillers

13. Model FS-2 Flow Switch

14. 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