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Series 3000MR/3000MRS Photohelic® Switch/Gage

Pressure switch/gage, range 0-50" w.c., 1.0 minor divisions.

$638.00

Item# 3050MRS

In stock

Lead Time (If not in stock): 3 weeks
Pressure switch/gage, range 0-50" w.c., 1.0 minor divisions. 3050MRS 3050MRS
  • Gage reading unaffected by switch operation and will continue to read pressure even during power loss
  • Zero and range adjustments outside of gage means no disassembly in normal service
  • Solid-state design allows for switching in high cycle rate applications without degradation

3050MRS Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Pressure Range
Alarm Types (DC/AC)
Pressure Type
Pressure Port Size
Accuracy Class
Dial Size


  • Accuracy ±2% of FS (3000-0 ±3% of FS). (3000-00 ±4% of FS).
  • Process Connections 1/8" female NPT (duplicated side and back).
  • Service Air and non-combustible
  • Size 4" (101.6 mm) dial face
  • Temperature Limits 20 to 120°F (-6.67 to 48.9°C).
  • Weight 1.8 Ib (816 g).
  • Wetted Materials Consult factory.
  • Agency Approvals(3000MR) CE.
  • Electrical Connections(3000MR) 18" (46 cm) cable assembly with 8 conductors. Optional lengths to 100' (30.5 m).
  • Electrical Connections(3000MRS) 18" (46 cm) cable assembly with 6 conductors
  • Mounting Orientation(3000MR) Diaphragm in vertical position. Consult factory for other position orientations.
  • Mounting Orientation(3000MRS) Diaphragm in vertical position. Consult factory for other position orientations.
  • Power Requirements(3000MR) 24 VDC
  • Power Requirements(3000MRS) 24 VDC
  • Pressure Limit -20" Hg. to 25 psig (-0.677 bar to 1.72 bar). MP option 35 psig (2.41 bar)
  • Relay Contacts(3000MR) (Resistive load) 1 form C rated 1.0A @ 30 VDC
  • Set Point Adjustment(3000MR) Adjustable knobs on face.
  • Switch Type(3000MR) Each setpoint has 1 form C relays (SPDT).
  • Switch Type(3000MRS) Each setpoint has a solid state relay.
  • Switching Current(3000MRS) 1.0 amp (AC) max.
  • Switching Voltage(3000MRS) 20-280 VAC (47-63 Hz).

Using solid state technology, the Series 3000MR/3000MRS Photohelic® Switch/Gages 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 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. All models provide both low and high limit control and include 18-inch (45 cm) cable assemblies for electrical connections.

Compatible with air and other non-combustible, non-corrosive gases, they can be used in systems with pressures to 25 psig (1.725 bar). Optional construction is available for use to either 35 psig (2.42 bar) or 80 psig (5.51 bar).

Included Accessories:
Mounting ring, snap ring
18" (45 cm) 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).

 

Please see Series AT-3000MR/MRS for ATEX approved.

Product Applications

  • Pneumatic Conveying
  • Air Conditioning Systems
  • Clean Rooms
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