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

Bourdon Tube
Not Applicable (Uses Diaphragm Technology)

Outer Size
Round, approximately 115 mm housing diameter

Sensor Type
Differential Pressure Sensor

Display
Analog with Setpoint Indicators

Thread
1/8 NPT Female

Seal Material
Silicone and Buna-N

Grade
Industrial Grade

Material
Die Cast Aluminum Case; Acrylic Front Cover; Brass Fittings

Dial Material
Plastic/Acrylic

Pointer Material
Aluminum

Processing Type
Precision-Machined

Diameter
115 mm

Glass Size
Clear Acrylic Cover, approximately 100 mm viewing area

Mount Type
Surface or Panel Mounting

Scale Range
0 to 25 mm H2O (Water Column)

Accuracy
2% of full scale

Accessories
Panel mounting hardware, terminal strip, instruction manual

Ingress Protection
IP54

Electrical Connections
Screw Terminals

Set Point Adjustment
External Adjustable Knobs

Switch Type
Photohelic (Electromechanical Switch with Photo Sensor)

Model
3000MRS Photohelic

Operating Temperature Range
-20C to 60C

Switch Contact Rating
10A @ 120/240 VAC

Response Time
Instantaneous/Adjustable by control circuit

Power Supply
120/240 VAC, 50/60 Hz

Mounting Orientation
Vertical (Standard)

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

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

Main Export Market(s)
Asia

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

Versatile Differential Pressure Monitoring

The Dwyer 3000MRS Photohelic Switch/Gauge caters to various industrial applications, offering precise monitoring of low differential pressures in steam, oil, and gas systems. Its diaphragm-based sensing technology ensures accurate readings, while the analog display with setpoint indicators allows for straightforward adjustments and real-time monitoring.

Robust Industrial Construction

Engineered for tough conditions, the 3000MRS model is constructed with a powder-coated die-cast aluminum housing, silicone and Buna-N seals, and brass fittings for resilience. Its IP54 ingress protection and wide operating temperature range from -20C to 60C assure dependable performance in diverse industrial settings.

Flexible Installation and Reliable Switching

This gauge supports both surface and panel mounting with included hardware and a 115 mm housing diameter. The electromechanical photo sensor switch offers instantaneous or adjustable response by control circuit, handling up to 10A at 120/240 VAC for seamless integration with your control systems.

FAQ's of Dwyer 3000MRS Photohelic Switch/Gauge 0 to 25 MM:

Q: How do I adjust the set points on the Dwyer 3000MRS Photohelic Switch/Gauge?

A: The set points on the Dwyer 3000MRS are easily adjusted using the external adjustable knobs located on the gauge. Simply turn the knobs until your desired pressure set points are indicated on the analog display, which also shows setpoint indicators for accurate setting.

Q: What types of media can the 3000MRS Photohelic measure differential pressure for?

A: This model is capable of measuring the differential pressure of steam, oil, and gas. It is widely used in applications requiring precise monitoring in industrial environments.

Q: When should the gauge be mounted in a vertical orientation?

A: Vertical orientation is recommended as the standard installation position for the Dwyer 3000MRS to ensure optimal accuracy and reliable performance. It can be surface or panel mounted using the provided accessories.

Q: Where are the electrical connections made on this gauge?

A: Electrical connections for the 3000MRS Photohelic Switch/Gauge are made via screw terminals located on the rear of the unit. The terminal strip is included to facilitate straightforward wiring during installation.

Q: What are the benefits of using a photo sensor electromechanical switch in this gauge?

A: The integration of a photo sensor with the electromechanical switch delivers fast and reliable switching actions with minimal mechanical wear, enhancing longevity and ensuring instant or controlled response for various process applications.

Q: How is pressure displayed and is the reading accurate?

A: The differential pressure is displayed on a large, clear analog dial with setpoint indicators. The gauge achieves 2% accuracy of full scale, providing precise, easily readable values for critical process monitoring.

Q: What accessories are included with the Dwyer 3000MRS Photohelic?

A: The package includes panel mounting hardware, a terminal strip for electrical connections, and an instruction manual to guide installation and operation.

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