Dwyer MP - Manual

Series MP Mini-Photohelic ®
Differential Pressure Switch/Gage
Bulletin B-37-A
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
Specifications - Installation and Operating Instructions
The Series MP Mini-Photohelic ® differential pres-
sure switch/gage combines the time proven
Minihelic ® II differential pressure gage with two
SPDT switching setpoints. The Mini-Photohelic ® is
designed to measure and control positive, negative,
or differential pressures consisting of non-com-
bustible and non-corrosive gases. Gage reading is
independent of switch operation. Switching status is
visible by LED indicators located on the front and
rear of the gage.
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: +/- 5% of full scale @ 70°F (21.1°C). Gage
face mounted in vertical position.
Pressure Limits: 30 psig (2.067 bar).
Temperature Limits: 20 to 120ºF (-6.7 to 49°C).
Process Connections: Barbed for 3/16˝ I.D. tubing
(STD); 1/8˝ male NPT (optional).
Size: 4-1/8˝ (104.78 mm) depth x 3-1/16˝ (77.79 mm)
diameter.
Weight: 23 oz (652 g).
SWITCH SPECIFICATIONS
Switch Type: (2) SPDT relays.
Electrical Rating: 5A @ 120/240 VAC Resistive; 5A @
30 VDC.
Electrical Connections: Screw Type Terminal Block.
Accepts 22-12 AWG wire.
Power Requirements: 24 VDC / 24 VAC 50/60 Hz 4
watts.
Mounting Orientation: Gage face in vertical position.
Set Point Adjustment: Push Buttons.
Standard Accessories: (2) mounting screws, (1) .050˝
hex allen wrench.
Agency Approvals: UL, cUL.
3-13/16 [96.84]
3-1/32 [77.00]
23/64 [36.51]
Ø2-19/32
[65.88]
%%3-1/16
[77.79]
1 [25.4]
3-1/32 [77.00]
HIGH PRESSURE
PORT
LOW PRESSURE
PORT
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