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Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25

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Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25" w.c.

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Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25" w.c. Specification

Sensor Type
Differential Pressure

Thread
1/8 NPT female high and low pressure connections

Display
Analog & Digital

Seal Material
Neoprene

Grade
Industrial

Outer Size
152 mm (6 inch) dial

Material
Die-cast aluminum housing

Dial Material
Plastic

Pointer Material
Aluminum

Processing Type
Precision engineered

Diameter
152 mm

Glass Size
152 mm window

Mount Type
Flush or Surface Mount

Scale Range
0-0.25 w.c.

Accuracy
2% of full scale

Finishing
Powder coated housing

Measure Pressure Of
Air and non-combustible gases

Accessories
Mounting bracket, Pressure lines, Operation manual

Model Number
3000MR-00

Pressure Limit
25 psig (1.7 bar)

Application
Filter monitoring, fan control, air control systems, clean rooms

Ambient Temperature Range
20 to 140F (-7 to 60C)

Electrical Connection
6 screw terminal

Power Supply
120/240 VAC, 50/60 Hz

Switch Rating
5A @ 120/240 VAC

Weight
1.8 kg (approx)

Case
Die-cast aluminum with polycarbonate window

Switch Type
Photohelic two SPDT relays

Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25" w.c. Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25" w.c.

Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge

Pressure Switch/Gage, Range 0-0.25" w.c., .005 minor divisions.

Description

Series 3000MR Photohelic Switch/Gage, Additional Range 0-0.25" w.c., Relay Type - Electromechanical Relays

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)

The 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. For applications requiring high cycle rates, choose 3000MRS models with SPST (N.O.) solid state relays. Model provide both low and high limit control and include 18-inch cable assemblies for electrical connections.

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

Specification

Gage Specifications
Service	Air and non-combustible, compatible gases
Accuracy	4% of FS at 70F
Pressure Limits	-20" Hg to 25 psig
Temperature Limits	20 to 120F
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

Engineered for Precision and Durability

The Dwyer 3000MR-00 features a rugged die-cast aluminum housing and is powder coated for enhanced resistance to industrial environments. The precision mechanism ensures reliable readings, and the Neoprene seal protects internal components. Its design enables long service life even in challenging applications.

Versatile Display and Control Options

This model combines analog and digital displays for clear visibility, even in varied lighting conditions. Dual SPDT relays provide flexible control capabilities for alarms or automation, making this gauge suitable for monitoring air filters, clean rooms, and fan or air handling systems.

Easy Installation and Wide Application

With options for flush or surface mounting and clear 1/8" NPT female pressure connections, the 3000MR-00 installs easily in diverse systems. It operates efficiently within an ambient range of 20 to 140F and withstands pressures up to 25 psig, suitable for a broad spectrum of air and non-combustible gas measurement needs.

FAQs of Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge Range: 0-0.25" w.c.:

Q: How do I install the Dwyer 3000MR-00 Photohelic Differential Pressure Switch/Gauge?

A: Installation is straightforward using the included mounting bracket and pressure lines. The unit can be flush or surface mounted, and the 1/8" NPT female high and low pressure connections fit standard pressure lines. Electrical connections are made via six screw terminals, supporting both 120 and 240 VAC power supply.

Q: What types of applications is the Dwyer 3000MR-00 suitable for?

A: The 3000MR-00 is ideal for industrial settings such as filter monitoring, HVAC fan control, air control systems, and clean room pressure monitoring, where accurate measurement and control of low differential pressures are required.

Q: When should the Dwyer 3000MR-00 be used over other pressure switches or gauges?

A: Choose the 3000MR-00 when you need high accuracy (2% of full scale) in the low pressure range of 0-0.25 w.c., dual relay switching, and both analog and digital displays for enhanced monitoring and control flexibility.

Q: Where can the Dwyer 3000MR-00 be mounted?

A: This device offers flexible installation, allowing for either flush or surface mounting. Its robust construction permits use in a variety of industrial environments, including HVAC control panels and clean room walls.

Q: What is the process to set relay switching points on the 3000MR-00?

A: Relay set points are adjusted using external dials accessible on the gauge face, allowing easy setting of upper and lower pressure thresholds to activate or deactivate your control devices as per your system requirements.

Q: Can the 3000MR-00 work with both 120 VAC and 240 VAC power supplies?

A: Yes, the unit supports both 120 VAC and 240 VAC at 50/60 Hz, making it suitable for diverse electrical setups found in industrial environments in India and worldwide.

Q: What are the main benefits of using the Dwyer 3000MR-00?

A: Benefits include highly accurate differential pressure measurement, robust industrial construction, reliable dual SPDT switching, easy installation, and versatility for monitoring air and non-combustible gases across various critical applications.

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