Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch

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Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch

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Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch Specification

Outer Size
4 Inch (101 mm) Dial Face

Thread
1/8 NPT Female High and Low Pressure Connections

Seal Material
Silicone Rubber

Grade
Industrial Grade

Sensor Type
Differential Pressure Sensor

Display
Analog with Switch Indicators

Material
Die-cast Aluminum Housing

Dial Material
Acrylic

Pointer Material
Aluminum

Processing Type
Precision Engineering

Diameter
4 Inch

Glass Size
4 Inch

Mount Type
Panel Mount or Surface Mount

Scale Range
0 to 50 inch w.c. (Water Column)

Accuracy
2% of Full Scale

Accessories
Mounting Hardware and Installation Manual

Set Point Adjustment
External Knobs

Compliance Standard
CE Marked

Power Supply
120VAC, 240VAC or 24VDC Models Available

Weight
1.6 lbs (0.73 kg)

Enclosure Rating
NEMA 2 (IP51)

Switch Type
SPDT Relay Switches (2 Adjustable Set Points)

Repeatability
1% of Full Scale

Contact Type
Gold-plated Contacts

Electrical Rating
5A @ 120/240 VAC

Ambient Temperature Range
20 to 120F (-6.7 to 48.9C)

Pressure Limits
30 psi (2.07 bar) Maximum

Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch Trade Information

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

Main Export Market(s)
Asia

Main Domestic Market
All India

About Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch

Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3050MRS-50 inch	Pressure Switch/Gage,Range 0-50 inch, 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

Versatile Pressure Monitoring and Control

The Dwyer 3050MRS Photohelic switch/gauge is designed to measure and control differential pressure in various applications, including steam, oil, and gas systems. Its dual SPDT relay switches enable automated control, while the analog display offers real-time monitoring. Ideal for industries needing precise pressure management, this solution integrates quick setup with panel or surface mounting flexibility.

Durable Construction and Practical Features

Built from die-cast aluminum with a corrosion-resistant black finish, the 3050MRS promises long-lasting durability even in challenging industrial environments. Its easy-to-read 4-inch acrylic dial, silicone rubber seals, and gold-plated contacts ensure maximum reliability. External knobs streamline set point adjustments, and detailed installation documentation is included for seamless integration.

FAQ's of Dwyer 3050MRS Photohelic Switch/Gauge 0 to 50 inch:

Q: How do I adjust the set points on the Dwyer 3050MRS Photohelic Switch/Gauge?

A: You can adjust the set points using the external knobs located on the device's front panel. These allow you to independently set the two SPDT relay switches without needing to open the enclosure.

Q: What power supply options are available for this gauge?

A: The Dwyer 3050MRS Photohelic Switch/Gauge supports three power supply options: 120VAC, 240VAC, or 24VDC. Select the model that matches your facility's available power for proper operation.

Q: Where can I use the Dwyer 3050MRS in an industrial setting?

A: This Photohelic gauge is suitable for environments requiring differential pressure monitoring and control, such as steam systems, oil lines, and gas distribution networks. Its NEMA 2 (IP51) enclosure rating is ideal for indoor installations with minimal exposure to dust or dripping water.

Q: What is the process for installing the 3050MRS gauge?

A: Installation is straightforward: use the provided mounting hardware for either surface or panel mounting. Electrical connections are made via screw terminals, and pressure connections utilize 1/8" NPT female fittings. An installation manual is included for reference.

Q: What are the main benefits of using the Dwyer 3050MRS Photohelic Switch/Gauge?

A: This instrument combines accurate analog pressure measurement with switch-based control, enabling precise automation and process protection. The external set point adjustment and gold-plated contacts enhance reliability and user convenience.

Q: How accurate and repeatable are the readings?

A: The 3050MRS provides accuracy within 2% of the full scale and repeatability of 1%, allowing you to trust your measurements and maintain consistent process control.

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