Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa Specification

Sensor Type
Photohelic Pressure Switch/Gauge

Seal Material
Neoprene

Thread
1/8 NPT Female

Bourdon Tube
Not applicable (uses diaphragm for low pressure measurement)

Outer Size
4 (101.6 mm) diameter

Grade
Industrial

Display
Analog Dial

Material
Die-cast aluminum housing

Dial Material
White with black graduations

Pointer Material
Black anodized aluminum

Processing Type
Pressure Measurement

Diameter
4 inches (101.6 mm)

Glass Size
4 inches (viewing window)

Mount Type
Surface or flush mounting

Scale Range
0 to 60 Pa

Accuracy
2% of full scale

Accessories
Panel mounting hardware, three wiring connectors, instructions

Electrical Rating
5A @ 120/240 VAC

Port Connections
High and low pressure ports, 1/8" NPT female

Maximum Pressure
25 kPa (3.6 psi)

Enclosure Rating
NEMA 2 (IP54 equivalent)

Switch Type
SPDT (Single Pole Double Throw)

Power Requirements
120 VAC, 240 VAC, or 24 VDC options

Reset
Auto and manual reset capabilities

Switch Action
Two adjustable electrical setpoints

Operating Temperature Range
-6.67 to 60C (20 to 140F)

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa Trade Information

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

Main Export Market(s)
Asia

Main Domestic Market
All India

About Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MRS-60 Pa	Pressure Switch/Gage,Range 0-60 Pa, 2.0 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

Reliable Low Pressure Monitoring

The Dwyer 3000MRS Photohelic Switch/Gauge offers accurate low-pressure measurement for industrial processes demanding reliability and safety. Its diaphragm-based sensing technology ensures consistent results in monitoring gases and steam, while the 0 to 60 Pa range covers fine differential measurements essential for process control environments.

Flexible Switch Control and Display

Equipped with two user-adjustable SPDT electrical setpoints, the 3000MRS not only measures pressure but can activate alarms or controls based on preset thresholds. The large 4-inch analog dial provides clear, real-time readings, making system diagnostics straightforward for operators on-site.

FAQ's of Dwyer 3000MRS Photohelic Switch/Gauge 0 to 60 Pa:

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

A: Adjusting the setpoints is simple using the front-mounted knobs on the gauge face. These enable precise setting of two SPDT electrical switch points, allowing you to customize the pressure trigger levels for alarms or system integration.

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

A: The 3000MRS is designed to measure the pressure of gases and steam, making it suitable for HVAC, process, and industrial applications where differential pressure monitoring is critical.

Q: Where can the Dwyer 3000MRS be installed and mounted?

A: This gauge can be surface-mounted or flush-mounted into panels. The package includes all necessary panel mounting hardware, so it fits various installation environments and requirements.

Q: What power supply options does the Dwyer 3000MRS accept?

A: It supports 120 VAC, 240 VAC, or 24 VDC power inputs, providing flexibility for integration into different electrical systems used in industrial facilities.

Q: When should I use the auto reset versus manual reset function?

A: The auto reset function is ideal when automatic system restoration is needed after a pressure anomaly, while the manual reset provides greater operator control for safety-critical processes or maintenance situations.

Q: What are the advantages of using the 3000MRS in industrial settings?

A: This model provides reliable, precise pressure monitoring, two adjustable control points, and both visual and electrical indicators, enhancing process safety, efficiency, and compliance with industrial standards.

Q: How is pressure connected and measured with the Dwyer 3000MRS?

A: Pressure is measured using the high and low 1/8" NPT female ports, designed for easy integration with existing piping or tubing. It uses a diaphragm sensor, ensuring accurate low-pressure readings without a Bourdon tube.

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