Dwyer MP Mini-Photohelic Differential Pressure Switch/Gage

Dwyer MP Mini-Photohelic Differential Pressure Switch/Gage combines the time proven Minihelic® II differential pressure gage with two SPDT switching set points. The Mini-Photohelic® switch/gage is designed to measure and control positive, negative, or differential pressures consisting of non-combustible 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. Set points are adjusted with push buttons on the back of the unit.

Dwyer MP Mini-Photohelic Features

Gage reading unaffected by switch operation and will continue to read pressure even during power loss
Visible switch status LED provides indication of set point switching state
Compact design but with the power of larger devices can meet the same application specifications

Application

Fume hoods
Dust collection
Pneumatic conveying
Clean room

Dwyer MP Mini-Photohelic Specification

Gage Specifications
Service	Air and non-combustible, compatible gases.
Wetted Materials	Consult factory.
Accuracy	±5% FS @ 70°F (21.1°C). Gage face mounted in vertical position.
Pressure Limits	30 psig (2.067 bar).
Temperature Limits	20 to 120°F (-6.7 to 49°C).
Process Connections	Barbed for 3/16″ ID 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	SPDT relays.
Electrical Rating	5 A @ 120/240 VAC resistive; 5 A @ 30 VDC.
Electrical Connections	Screw type terminal block. Accepts 22-12 AWG wire.
Power Requirements	24 VDC / 24 VAC 50/60 Hz 4 W.
Mounting Orientation	Gage face in vertical position.
Set Point Adjustment	Push buttons.
Standard Accessories	(2) mounting screws, (1) .050″ hex allen wrench.
Agency Approvals	CE, cULus.