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Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM

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Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM

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Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM Specification

Sensor Type
Photohelic Differential Pressure Sensor

Thread
1/8 NPT Female

Display
Analog with Dual Setpoint Switch

Outer Size
Standard Gauge Housing

Grade
Industrial

Seal Material
Neoprene

Material
Die-Cast Aluminum Case, Polycarbonate Window

Dial Material
Aluminum, White Background with Black/Red Markings

Pointer Material
Black Anodized Aluminum

Processing Type
Injection Molded

Diameter
4 inch (100 mm)

Glass Size
Approximately 4 inch

Mount Type
Panel Mount

Scale Range
0 to 10 mm H2O

Accuracy
2% of full scale

Finishing
Textured Black ABS Case

Measure Pressure Of
Air and Non-Corrosive Gases

Accessories
Mounting Brackets, Panel Mounting Hardware, Instruction Manual

Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM

Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MR-10MM	Pressure Switch/Gage,Range 0-10MM, .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

Robust and Reliable Construction

Manufactured with a die-cast aluminum case and a polycarbonate window, the Dwyer 3000MR ensures longevity and dependable operation even in demanding industrial environments. Its sealed, injection-molded design minimizes leaks and preserves precise differential pressure measurement for years.

Simple Installation and Operation

The gauge is designed for straightforward panel mounting, featuring a 1/8 NPT female thread and including all necessary brackets and hardware. Its analog dial, with a clear white background and distinct markings, makes reading and configuring pressure levels effortless.

Versatile Control with Dual Setpoint Relays

Equipped with two SPDT relays, the 3000MR provides flexible switching functions. It easily integrates into automated systems, acting both as a gauge and a switch to enhance process control and safety by responding instantly to pressure changes.

FAQs of Dwyer 3000MR Photohelic Switch/Gauge 0 to 10 MM:

Q: How does the Dwyer 3000MR Photohelic Switch/Gauge operate?

A: The 3000MR functions both as a visual pressure gauge and a differential pressure switch. It measures pressure differences in air or non-corrosive gases and, when set thresholds are reached on the analog display, its two SPDT relays activate to control external equipment.

Q: What types of applications can this switch/gauge be used for?

A: It is well-suited for industrial, HVAC, and filtration applications where monitoring low differential pressures and triggering system responses (such as alarms or fan controls) are necessary. Its accuracy and build make it ideal for clean rooms, duct monitoring, and filter status indication.

Q: When should I use the setpoint relays on the 3000MR?

A: Setpoint relays should be configured when you need automatic responses to pressure changessuch as activating alarms or shutting down equipmentwithout manual intervention. The dual SPDT design offers flexibility in controlling multiple devices.

Q: Where can I mount the Dwyer 3000MR gauge?

A: This gauge is designed for panel mounting and comes with appropriate brackets and hardware. Its standard 4-inch diameter housing ensures compatibility with typical industrial control panels.

Q: What is the process for installing the switch/gauge?

A: Installation involves mounting the gauge to your control panel using the supplied hardware, connecting process lines to the 1/8 NPT ports, wiring the relay outputs as needed, and configuring the setpoints via the accessible front dials.

Q: How accurate are the readings on the 3000MR gauge?

A: The Dwyer 3000MR offers an accuracy of 2% of full scale, ensuring reliable performance in critical applications demanding precise differential pressure measurements.

Q: What are the main benefits of using this device in industrial settings?

A: Benefits include robust construction for long life, instantaneous mechanical response for fast system control, combined measurement and switching functions for simplicity, and comprehensive panel mounting accessories for streamlined installation.

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