ENVIRO TECH INDUSTRIAL PRODUCTS
GST : 07AOSPS8386M1ZM

Call us now

08045477767

Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch

Send Inquiry

Request To Call Back

Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch

Get a Price/Quote

Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch Specification

Grade
Industrial

Seal Material
Buna-N

Outer Size
4 (101.6 mm) case diameter

Bourdon Tube
Not Applicable (Diaphragm based)

Display
Analog

Thread
1/8 NPT Female High and Low Pressure Connections

Sensor Type
Photohelic Differential Pressure Switch/Gauge

Material
Die-cast aluminum case, polycarbonate lens

Dial Material
Polystyrene

Pointer Material
White PVC

Processing Type
Electrically operated

Diameter
4 inches (101.6 mm)

Glass Size
4 inches nominal

Mount Type
Flush or surface mount

Scale Range
0 to 3 inch of water (in. w.c.)

Accuracy
2% of full scale

Finishing
Textured grey epoxy-coated aluminum

Measure Pressure Of
Air and compatible gases

Accessories
Mounting hardware, Installation manual

Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch 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, North America, South America, Eastern Europe, Western Europe, Middle East, Africa, Asia

Main Domestic Market
All India

About Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch

Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3003MRS-3 inch	Pressure Switch/Gage,Range 0-3 inch, .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

Robust Differential Pressure Monitoring

Utilizing a diaphragm-based sensor, the 3003MRS Photohelic provides precise monitoring and control of differential pressure for air and compatible gases. Designed for industrial environments, it handles pressures up to 25 psig (1.7 bar), ensuring reliable operation in demanding conditions. Its external adjustment knobs and fast switching response offer practical and efficient operation.

User-Friendly Design and Installation

The 3003MRS features front-accessible set point adjustment knobs and an easy-to-read analog display, simplifying calibration and monitoring. The units 4-inch die-cast aluminum case allows for flush or surface mounting, while 1/8 NPT female connections make plumbing straightforward. Supplied with mounting hardware and a detailed installation manual, setup is hassle-free for professionals.

FAQs of Dwyer 3003MRS Photohelic Switch/Gauge 0 to 3 inch:

Q: How do I adjust the set points on the Dwyer 3003MRS Photohelic Switch/Gauge?

A: Set points can be easily adjusted externally using the front knobs. Simply turn the appropriate knob while observing the analog display to calibrate your desired high and low pressure thresholds. No tools or case removal are required.

Q: What are the primary benefits of using the 3003MRS Photohelic in HVAC or industrial applications?

A: This Photohelic gauge combines accurate differential pressure measurement with fast-response switching, improving system control and safety. Its 2% accuracy, fast relay response, and visible analog display help optimize performance, reduce downtime, and protect equipment.

Q: Where can the 3003MRS be installed, and what mounting options are available?

A: The unit can be flush or surface mounted, offering installation flexibility for control panels or walls. The provided mounting hardware and installation manual enable secure placement in general-purpose indoor locations (NEMA 1 rated).

Q: What types of media can be measured with this device?

A: The 3003MRS is designed to measure the differential pressure of air and compatible gases only. It is not suitable for liquids or corrosive gases outside the listed compatibility.

Q: When should the switchs repeatability and accuracy be considered during operation?

A: If precise control is needed in automated processes, the units 1% repeatability and 2% full-scale accuracy ensure consistent switching and precise measurements. This is vital during calibration, maintenance, or system troubleshooting.

Q: What electrical requirements and ratings does the 3003MRS Photohelic have?

A: The device requires 120 VAC (60 Hz) power and its SPDT relays are rated for 5A at either 120 or 240 VAC, making it suitable for most industrial and building automation power setups.

Tell us about your requirement