Dwyer 3005MRS Photohelic,Switch/Gauge 0 to 5 in W.C

About Dwyer 3005MRS Photohelic,Switch/Gauge 0 to 5 in W.C

Dwyer 3005MRS Photohelic,Switch/Gauge 0 to 5 in W.C

Pressure switch/gage, range 0-5" w.c., .10 minor divisions.

Model: 3005MRS

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. Versatile electromechanical relays with gold over silver contacts - ideal for dry circuits. 

Dwyer 3005MRS Photohelic, Switch/Gauge 0 to 5 in W.C.

Using solid state technology, there Series 3000MR and 3000MRS Photohelic switch/gauges 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" (122 mm) 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. All models provide both low and high limit control and include 18-inch (45 cm) 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 (1.725 bar). 

Versatile Pressure Monitoring and Control

The Dwyer 3005MRS Photohelic offers simultaneous analog display and dual SPDT relay switching, making it ideal for applications requiring both monitoring and control. Whether installed in HVAC systems, filter status panels, or airflow and fan control setups, it delivers reliable and efficient performance.


Built for Industrial Demands

Engineered with a durable die-cast aluminum body and a polycarbonate cover, this switch/gauge withstands demanding environments. Its overpressure protection, high accuracy (2% of full scale), and broad temperature range ensure reliability in diverse settings, from industrial plants to commercial facilities.


User-Friendly Installation and Operation

Mounting is straightforward with flush or surface options and included brackets and screws. The clear analog display assists in easy pressure readings, while screw terminal block connections simplify the electrical hook-up. Its compact 4-inch diameter enhances versatility in panel design.