About Dwyer 3000MR Photohelic,Switch/Gauge 0 to 500 PAC

Dwyer 3000MR Photohelic,Switch/Gauge 0 to 500 PAC

Series 3000MR/3000MRS Photohelic® Switch/Gage

Combines Differential Pressure Gage with Low/High Set-Points, Compact Size

Model	Description
3000MR-500PA	Pressure Switch/Gage, Range 0-500 Pa, 10.0 minor divisions.

Using solid state technology, the SERIES 3000MR AND 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); and (3) 6-32 x 5/16" RH machine screws (surface mounting). 

Reliable Pressure Control for Critical Environments

The Dwyer 3000MR Photohelic Switch/Gauge is ideal for monitoring and controlling low-pressure air and compatible gases in demanding environments. Trusted applications include HVAC systems, clean rooms, air filter checks, and automated process control, providing swift switching within one second and precise analog readouts up to 500 Pa. Factory calibration and superior build quality make it a dependable solution for industrial use.


Flexible and Durable Design

Constructed from die-cast aluminum with a polycarbonate lens, this gauge ensures longevity in rugged settings. It is designed for surface or flush mounting, with a vertical orientation preferred. Accessories supplied, like mounting hardware and an instruction manual, streamline installation and setup. IP54 protection further enhances longevity in industrial conditions.