Dwyer Series MP Mini-Photohelic® Differential Pressure Switch/Gage

Product Description

Compact, Low Cost Switch/Gage

The Series 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 back of unit. This extremely compact switch/gage is ideal for fume hoods, dust collection, pneumatic conveying and clean room applications.

Product Applications

• Fume hoods
• Dust collection
• Pneumatic conveying
• Clean room

Models

Specifications

GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±5% of 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″ I.D. tubing; 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: CE, cUL, UL.

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

Options

• For optional 1/8″ male NPT connections, add suffix -NPT to model numbers.
  
  Example: MP-000-NPT. No extra charge. Allow additional lead time.

Literature

Manuals

Instruction Manual

Catalog Pages

Series MP Catalog Page

Approvals

• UL-Motor Controllers-Canada
• UL-Motor Controllers-US
• GOST-R Certificate

Drawings

• pdf
• dwg
• 3-D Drawing for A-489
• 3D Drawing (MP)

Accessories

	Model Number	Description
	A-489	4″ 303 SS straight static pressure tip with flange.
	A-301	Static pressure tip, for 1/4″ metal tubing connection.
	A-302	Static pressure tip, for 3/16″ and 1/8″ ID plastic or rubber tubing.
	A-302F-A	303SS static pressure tip with mounting flange, 4″ hook style. For 3/16″ ID rubber or plastic tubing, includes mounting screws.

Model Chart