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Series 3000MR/3000MRS Photohelic® Switch/Gauge

Brand: Dwyer Instruments, LLC

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Using solid state technology, the Series 3000MR/3000MRS Photohelic® Switch/Gauges combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gauge employing the durable, time-proven Magnehelic® gauge design.

Switch setting is easy to adjust with large external knobs on the gauge face. Gauge 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); and (3) 6-32 x 5/16" RH machine screws (surface mounting).
Features
  • Gauge reading unaffected by switch operation and will continue to read pressure even during power loss
  • Zero and range adjustments outside of gauge means no disassembly in normal service
  • Solid-state design allows for switching in high cycle rate applications without degradation
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Using solid state technology, the Series 3000MR/3000MRS Photohelic® Switch/Gauges combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gauge employing the durable, time-proven Magnehelic® gauge design.

Switch setting is easy to adjust with large external knobs on the gauge face. Gauge 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); and (3) 6-32 x 5/16" RH machine screws (surface mounting).
Features
  • Gauge reading unaffected by switch operation and will continue to read pressure even during power loss
  • Zero and range adjustments outside of gauge means no disassembly in normal service
  • Solid-state design allows for switching in high cycle rate applications without degradation

Specifications

Accessories

  • Mounting Bracket Flush Mount 3000MR/MRS Bracket

Accuracy

  • ± 2 % of Full Scale
  • 3000-0 ± 3 % of Full Scale
  • 3000-00 ± 4 % of Full Scale

Adjustment Type

  • Adjustable Knobs on Face

Approvals & Certifications

  • CE

Electrical Connectors

  • 18" Cable (46 cm) Assembly with 8-Conductors

Electrical Rating

  • 0.3 A at 110 Vdc or 0.5 A at 125 Vac
  • 1.0 A at 30 Vdc

Input

  • 0.01 mA (AC) Minimum
  • 1.0 Amp (AC) - Maximum

Media

  • Air
  • Non-Combustible, Compatible Gases

NACE & NIST

  • NIST

NPT Connection

  • 1/8" NPT Female

Power Requirement

  • 24 Vdc Regulated ± 10 %

Sensor Orientation

  • Diaphragm in Vertical Position

Set Point - Decreasing

  • cm WC: 0 to 20
  • Inches WC: 0 to 100
  • kPa: 0 to 4
  • mm WC: 0 to 100
  • Pa: 0 to 500

Set Point - Increasing

  • cm WC: 0 to 20
  • Inches WC: 0 to 100
  • kPa: 0 to 4
  • mm WC: 0 to 100
  • Pa: 0 to 500

Size

  • Dial: 4" (101.6 mm)
  • Gauge: 5" (127 mm) O.D. × 3-1/8" (79.38 mm)

Supply Voltage

  • 20 to 280 Vac (47-63 Hz)

Switch Type

  • Each Set Point Has 1 Form C Relays (SPDT)

System Pressure

  • bar: 5.5
  • kPa: 550
  • psig: 80 (For hp Version. 25 psig Otherwise.)

Temperature Range

  • -6.7° to 48.9° C (20° to 120° F)

Typical Applications

  • Pneumatic Conveying
  • Air Conditioning Systems
  • Clean Rooms