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Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM

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Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM

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Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM Specification

Bourdon Tube
Not Applicable (Uses Diaphragm Sensing Element)

Thread
1/8 female NPT (Pressure Connections)

Display
Analog Dial

Sensor Type
Photohelic

Grade
Industrial

Outer Size
Standard 4 (101 mm) Diameter

Seal Material
Neoprene (Standard)

Material
Die-cast Aluminum Case, Acrylic Cover

Dial Material
Acrylic

Pointer Material
Aluminum

Processing Type
Factory Calibrated

Diameter
4 inches (101 mm)

Glass Size
4 inches (101 mm)

Mount Type
Flush or Surface Mounting

Scale Range
0 to 50 mm (Water Column)

Accuracy
2% of Full Scale

Finishing
Glossy Black Case Finish

Measure Pressure Of
Low Air or Non-Corrosive Gases

Accessories
Mounting ring, snap ring, and screws included

Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM

Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MR-50MM	Pressure Switch/Gage,Range 0-50MM, 1.0 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

Advanced Pressure Sensing Technology

Equipped with a diaphragm-based mechanism, the Dwyer 3000MR Photohelic Switch/Gauge provides accurate measurement and dependable switching for low pressure applications. The use of high-quality materials such as a die-cast aluminum case and gold-plated switch contacts ensures long-lasting and stable performance.

Versatile Mounting and Protection

This gauge is factory calibrated and comes with essential mounting hardware, supporting both flush and surface installations. The IP54 enclosure rating protects against dust ingress and limited water splash, making it suitable for demanding industrial environments.

Ease of Use and Compliance

No external power is required for gauge operation, simplifying installation. The analog dial allows for straightforward monitoring, while RoHS compliance ensures safe and responsible use in modern facilities.

FAQs of Dwyer 3000MR Photohelic Switch/Gauge 0 to 50 MM:

Q: How is the Dwyer 3000MR Photohelic Switch/Gauge installed?

A: The unit is designed for flexibility, supporting both flush and surface mounting. It includes a mounting ring, snap ring, and screws. Pressure connections are made via standard 1/8 female NPT threads, and electrical wiring uses screw terminals for straightforward installation.

Q: What types of pressure media can the 3000MR measure?

A: This gauge is intended for use with low air or other non-corrosive gases. It is not suitable for measuring liquids or highly corrosive substances.

Q: When should the mechanical switches be used, and what are their ratings?

A: The two integrated SPDT mechanical switches are ideal for control or alarm applications. Each switch is rated for up to 5A at 120/240 VAC, providing reliable operation in industrial circuits.

Q: Where is the Dwyer 3000MR commonly used?

A: Commonly found in industrial and HVAC environments across India, it monitors low pressure in cleanrooms, filter monitoring, air handling units, and process applications involving non-corrosive gases.

Q: What are the benefits of using a diaphragm sensing element in this gauge?

A: The diaphragm ensures precise pressure response and eliminates the drawbacks of traditional bourdon tubes. It allows for accurate low-pressure measurement while maintaining durability and minimal maintenance.

Q: How does the IP54 enclosure rating enhance the gauges usability?

A: With an IP54 rating, the enclosure is protected against dust entry and limited water spray, making it suitable for industrial settings where moderate exposure to environmental elements is expected.

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