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Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge

Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge
Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge
Product Code : Dwyer
Product Specifications
Measure Pressure Of :
Gas, Oil, Steam
Product Description

Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge

Pressure Switch/Gage, Range 0-0.25" w.c..005 minor divisions. 


Series 3000MR Photohelic® Switch/Gage, Additional Range 0-0.25" w.c., Relay Type - Electromechanical Relays


  • mounting ring, snap ring
  • 18" cable assembly
  • (2) 3/16" tubing to 1/8" NPT adapters
  • (2) 1/8" NPT pipe plugs
  • (4) 6-32 x 1-1/4" RH machine screws (panel mounting)
  • (3) 6-32 x 5/16" RH machine screws (surface mounting)

The Series 3000MR Photohelic® Switch/Gage combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gage employing the durable, time-proven Magnehelic® gage design. Switch setting is easy to adjust with large external knobs on the gage face. Gage reading is unaffected by switch operation - will indicate accurately even if power is interrupted. Solid state design now results in greatly reduced size and weight. Units can be flush mounted in 4-13/16" hole or surface mounted with hardware supplied. 3000MR models employ versatile electromechanical relays with gold over silver contacts - ideal for dry circuits. For applications requiring high cycle rates, choose 3000MRS models with SPST (N.O.) solid state relays. Model provide both low and high limit control and include 18-inch cable assemblies for electrical connections.

Gage accuracy is ±2% of full scale and switch repeatability is ±1%. Switch deadband is one pointer width - less than 1% of full scale. Compatible with air and other non-combustible, non-corrosive gases, they can be used in systems with pressures to 25 psig.


  • Fan Control
  • Damper Control
  • Environmental Pollution Control


Gage Specifications
ServiceAir and non-combustible, compatible gases
Accuracy±4% of FS at 70°F
Pressure Limits-20" Hg to 25 psig
Temperature Limits20 to 120°F
Process Connections1/8 female NPT (duplicated side and back)
Size4" dial face, 5" O.D. x 3-1/8"
Weight1.8 lb
Switch Specifications
Switch TypeEach setpoint has 1 Form C relay (SPDT)
Relay Contacts(resistive load) 1 Form C rated 1.0A @ 30 VDC, 0.3A @ 110 VDC or 0.5A @ 125 VAC. Gold over clad silver - suitable for dry circuits
Electrical Connections18" cable assembly with 8 conductors
Power Requirements24 VDC, regulated ±10%
Mounting OrientationDiaphragm in vertical position
Set Point AdjustmentAdjustable knobs on face
Agency ApprovalsCE


Contact Us

X/852, Chand Mohalla, Gandhi Nagar, Industrial Area, Delhi, Delhi, 110031, India
Phone :+918068342381