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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM Specification

Display
Analog with Mechanical Pointer and Setpoint Windows

Sensor Type
Differential Pressure Sensor

Seal Material
Silicone Rubber

Grade
Industrial

Outer Size
(Approx.) 115 mm Diameter

Bourdon Tube
Not Applicable (Uses Diaphragm Sensing)

Thread
1/8 NPT Female

Material
Die-Cast Aluminum Case, Polycarbonate Front Cover

Dial Material
White Aluminum

Pointer Material
Black Aluminum

Processing Type
Factory Calibrated

Diameter
(Case) 115 mm

Glass Size
(Approx.) 95 mm Diameter Viewing Window

Mount Type
Flush or Surface Mount

Scale Range
0 to 25 mm W.C.

Accuracy
2% of Full Scale

Finishing
Textured Black Enamel Case

Measure Pressure Of
Air and Compatible Gases

Accessories
Mounting Bracket, Screws, Calibration Certificate

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM Trade Information

Payment Terms
Cash on Delivery (COD), Cash Against Delivery (CAD), Cash in Advance (CID), Cheque, Cash Advance (CA)

Main Export Market(s)
South America, Middle East, Western Europe, Africa, Central America, Eastern Europe, Asia, North America, Australia

Main Domestic Market
All India

About Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MRS-25 MM	Pressure Switch/Gage,Range 0 - 25 MM, .50 minor divisions.

Includes

mounting ring, snap ring
18" 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)

he Series 3000MR Photohelic® Switch/Gage 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" hole or surface mounted with hardware supplied. 3000MR models employ versatile electromechanical relays with gold over silver contacts - ideal for dry circuits.

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.

Applications

Fan Control
Damper Control
Environmental Pollution Control

Approvals

CE Approval
GOST-R Certificate

Specification

Service	Air and non-combustible, compatible gases
Accuracy	±2% of FS at 70°F
Pressure Limits	-20" Hg to 25 psig
Temperature Limits	20 to 120°F
Process Connections	1/8 female NPT (duplicated side and back)
Size	4" dial face, 5" O.D. x 3-1/8"
Weight	1.8 lb
Switch Specifications
Switch Type	Each setpoint has 1 Form C relay (SPDT)
Relay Contacts	(resistive load) 1 Form C rated 1.0A @ 30 VDC, 0.3A @ 110 VDC or 0.5A @ 125 VAC. Gold over clad silver - suitable for dry circuits
Electrical Connections	18" cable assembly with 8 conductors
Power Requirements	24 VDC, regulated ±10%
Mounting Orientation	Diaphragm in vertical position
Set Point Adjustment	Adjustable knobs on face
Agency Approvals	CE

Accurate Differential Pressure Monitoring

The Dwyer 3000MRS-25MM delivers precise measurement of air and compatible gas pressures from 0 to 25 mm W.C. It uses a diaphragm sensing mechanism, ideal for applications that demand high accuracy such as clean rooms and HVAC systems. Immediate analog response with electronic switching ensures reliable performance.

Rugged Construction for Industrial Use

This gauge boasts a die-cast aluminum case with a textured black enamel finish and a polycarbonate front cover. Its IP54 front-panel rating safeguards against dust and accidental splashes, while the silicone rubber seal enhances pressure containment. Designed for longevity, it suits harsh industrial settings in India.

Easy Installation and Flexible Mounting

With standard 1/8" NPT female connections and included mounting bracket and screws, the Dwyer 3000MRS-25MM is adaptable to flush or surface installations. The sizable analog display with setpoint windows makes on-site adjustments straightforward, fostering operational convenience.

FAQs of Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM:

Q: How do I install the Dwyer 3000MRS-25MM Photohelic Switch/Gauge?

A: Installation is straightforward with the included mounting bracket and screws. You can mount the gauge flush or on the surface. Connect the two 1/8" NPT female process connections to your air or compatible gas lines. Ensure the power supply is 120 VAC for proper operation.

Q: What applications is this model most suitable for?

A: The Dwyer 3000MRS-25MM is designed for fan and filter monitoring, duct static pressure detection, and clean room pressure control. Its accuracy and rapid switching make it suitable for critical industrial environments where differential pressure monitoring is essential.

Q: When should the setpoints be adjusted?

A: You should adjust the two electronic setpoints when your systems desired pressure thresholds change. This flexibility ensures optimal protection and control based on changing operational requirements, preventing equipment overload or unsafe pressure levels.

Q: Where can this gauge be used, given its enclosure protection rating?

A: The unit carries an IP54 front-panel rating, making it suitable for indoor industrial environments where protection from dust and accidental water splashes is necessary. However, it should not be used in environments with direct water exposure or outdoor applications.

Q: What is the switching response time?

A: The analog gauge provides immediate pressure readings, while the electronic switches respond in under 25 milliseconds. This ensures highly responsive control and timely signaling in dynamic process conditions.

Q: How do I benefit from using the Photohelic switch/gauge design?

A: The dual-function design allows both analog monitoring and electronic switching at adjustable setpoints, streamlining control and alert processes. It enhances operational safety, reduces manual intervention, and supports automated system integration.

Q: What process media can be measured with this product?

A: The 3000MRS-25MM is intended to measure differential pressure of air and compatible gases only. The sensor components are not suited for liquid or corrosive media.

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