About Dwyer 3000MR Photohelic,Switch/Gauge 0 to 250 PAC

Dwyer 3000MR Photohelic,Switch/Gauge 0 to 250 PAC

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MR-250PA	Pressure Switch/Gage, Range 0-250 Pa, 5.0 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). 

Accurate Differential Pressure Measurement

Engineered with a diaphragm/piston sensing element, the 3000MR Photohelic ensures precise measurement of air and non-corrosive gas pressure differentials. Its repeatability of 1% and accuracy within 2% of full scale provide reliable readings, essential for critical industrial processes demanding tight tolerances.


Dual SPDT Relay Switching for Automatic Control

Equipped with two SPDT relays, this Photohelic gauge not only displays pressure but also activates control equipment. The relays are rated for both AC and DC operation, enabling seamless integration into various automation setups for alarms, fans, or ventilation systems, enhancing operational safety and efficiency.


User-Friendly Design and Adjustability

Front-accessible external knobs allow quick pressure setpoint adjustments, while an external zero adjustment screw makes calibration straightforward. The device is supported with clear panel dial readings, a robust powder-coated die-cast housing, and comes complete with mounting hardware and an instruction manual for effortless installation.