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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa Specification

Sensor Type
Photohelic Differential Pressure Sensor

Seal Material
Silicone rubber

Display
Analog & Switch (Photohelic)

Thread
1/8 NPT Female

Grade
Industrial

Outer Size
Approx. 146 mm diameter x 80 mm depth

Material
Die-cast aluminum housing with polycarbonate lens

Dial Material
Aluminum, white with black/red markings

Pointer Material
Aluminum, black finish

Processing Type
Precision die-cast

Diameter
146 mm (front flange)

Glass Size
125 mm nominal view area

Mount Type
Panel / Surface mount

Scale Range
0 to 3 kPa

Accuracy
2% of full scale

Finishing
Powder-coated aluminum case

Measure Pressure Of
Air and non-combustible, compatible gases

Accessories
Mounting hardware and instruction manual included

Switch Type
SPDT snap action, two switches

Enclosure Protection
IP54 (front, when panel mounted)

Media Compatibility
Air and compatible, dry, non-ionic gases only

Overpressure Limit
103 kPa (15 psi) continuous, 172 kPa (25 psi) momentary

Electrical Rating
Rated 5A @ 120/240 VAC, resistive load

Compliance/Certifications
CE Marked

Connection Location
Side and rear pressure ports

Power Supply
Not required for gauge operation; 117/220 VAC for switch illumination

Set Point Adjustment
External (front panel dials)

Switch Response Time
Under 50 milliseconds

Weight
Approx. 0.9 kg (2 lbs)

Contact Arrangement
Two adjustable set points with visual indicators

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

Repeatability
±1% of FS

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MRS-3 kPa	Pressure Switch/Gage,Range 0-3 kPa, .10 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

Precision and Versatility in Pressure Monitoring

The Dwyer 3000MRS Photohelic Switch/Gauge combines analog display with two highly responsive SPDT switches, making it suitable for critical process control and monitoring applications. Visual set point indicators and external adjustment dials offer intuitive and precise control, ensuring the device meets demanding requirements in various industries.

Rugged Industrial Construction

Featuring a die-cast aluminum housing, a polycarbonate lens, and powder-coated finishing, the Dwyer 3000MRS is built for long-term durability. It supports IP54 front protection when panel mounted, with robust silicone seals and aluminum components for reliable operation even in challenging environments.

FAQs of Dwyer 3000MRS Photohelic Switch/Gauge 0 to 3 kPa:

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

A: The set points can be adjusted externally using the front panel dials. Simply turn each dial to achieve your desired pressure switch points, which are clearly indicated by visual markers on the gauge face.

Q: What is the suitable operating environment for this gauge?

A: This Photohelic gauge is designed for environments with temperatures ranging from -6.67C to 60C (20F to 140F) and is ideal for use with air or compatible, dry, non-ionic gases. Ensure the front is panel mounted for IP54 protection against dust and splashing water.

Q: When is power supply required for the Dwyer 3000MRS?

A: No external power supply is necessary for basic gauge operation. Power is only needed if you wish to use the switch illumination feature, which accepts 117/220 VAC.

Q: Where are the pressure ports located on the device?

A: For installation flexibility, the Dwyer 3000MRS features pressure ports on both the side and rear of the housing, each with 1/8 NPT female threads for compatible fittings.

Q: What process media is compatible with this model?

A: The gauge is suitable for measuring differential pressure in air and other non-combustible, compatible, dry, and non-ionic gases. It should not be used with liquids or corrosive, ionizing gases.

Q: How fast does the switch respond to pressure changes?

A: The SPDT switches have a rapid response time of under 50 milliseconds, ensuring timely actuation in demanding process applications.

Q: What are the primary benefits of using the Dwyer 3000MRS Photohelic Switch/Gauge in industrial settings?

A: Key benefits include precise pressure measurement with 2% full-scale accuracy, visual and switch outputs for process control, front-panel set point adjustability, high durability, and compliance with CE standards. Its versatility suits a variety of industrial air monitoring applications in India.

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