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Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C

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Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C

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Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C Specification

Display
Analog Dial with Switch Indicators

Outer Size
4 inch (approx. diameter)

Bourdon Tube
Not Applicable (diaphragm type)

Grade
Industrial

Seal Material
Synthetic rubber

Thread
1/8 NPT Female

Sensor Type
Differential Pressure Sensor

Material
Aluminum case, polycarbonate lens

Dial Material
Aluminum with enamel finish

Pointer Material
Balanced aluminum

Processing Type
Precision Assembly

Diameter
4 inch

Glass Size
4 inch viewing dome

Mount Type
Panel Mount

Scale Range
0 to 3 in W.C

Accuracy
2% of full scale

Finishing
Powder-coated and anodized housing

Measure Pressure Of
Air and compatible gases

Accessories
Mounting hardware, Instruction Manual

Switch Quantity
Dual switches

Weight
Approx. 1.2 lbs (0.54 kg)

Power Supply
None required (passive gauge, switch is mechanical)

Compliance
RoHS Compliant

Electrical Ratings
5A @ 120/240 VAC

Switch Type
SPDT (Single-Pole, Double-Throw)

Enclosure Rating
NEMA 2 (for indoor use)

Set Point Adjustment
External Knobs (front panel)

Pressure Connection
High and low pressure ports, 1/8" NPT

Model Number
3003MRS

Operating Temperature
20°F to 120°F (-6.7°C to 48.9°C)

Contact Material
Silver alloy

Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C

Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C

Pressure switch/gage, range 0-3" w.c., .10 minor divisions.

Model: 3003MRS

Combine the functions of a precise, highly repeatable differential pressure switch with a large easy-to-read analog pressure gauge employing the durable, time-proven Magnehelic gauge design. Versatile electromechanical relays with gold over silver contacts - ideal for dry circuits.

Dwyer 3003MRS Photohelic, Switch/Gauge 0 to 3 in W.C.

Using solid state technology, there Series 3000MR and 3000MRS Photohelic switch/gauges 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" (122 mm) 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. All models provide both low and high limit control and include 18-inch (45 cm) 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 (1.725 bar).

Reliable Differential Pressure Control

The Dwyer 3003MRS Photohelic integrates both precise analog pressure measurement and automated switching. Its dual SPDT switches are easily set using the front panel knobs, enabling efficient monitoring and control without the need for external power. This combination ensures both visual accuracy and dependability, supporting a range of industrial air handling scenarios.

Durable Industrial Design for Indoor Use

Engineered with a robust aluminum case and a powder-coated, anodized finish, the 3003MRS is built to last in demanding environments. The NEMA 2 enclosure rating ensures protection against dust and light splashes, while its synthetic rubber seals and polycarbonate lens add durability. Suited for panel mounting, this gauge delivers consistent accuracy in indoor, industrial settings.

Easy Installation and Versatile Applications

Fitted with standard 1/8" NPT high and low pressure ports, the 3003MRS offers flexible panel mounting and straightforward connections. Supplied with complete mounting hardware and instructions, installation is simple. Its versatility makes it ideal for monitoring clean rooms, filter status, or fan control in HVAC and process air applications.

FAQs of Dwyer 3003MRS Photohelic,Switch/Gauge 0 to 3 in W.C:

Q: How do I adjust the pressure switch set points on the Dwyer 3003MRS Photohelic?

A: You can adjust the switch set points using the external knobs located on the front panel of the device. These knobs let you set both high and low pressure activation points without opening the housing, allowing for quick and precise in-field adjustments.

Q: What types of gases are compatible with the 3003MRS Photohelic Switch/Gauge?

A: The Dwyer 3003MRS is designed for use with air and other compatible, non-corrosive gases. Avoid using it with liquids or corrosive gas mixtures, as these can damage the diaphragm sensing element and internal components.

Q: When should I use a Photohelic Switch/Gauge instead of a standard pressure gauge?

A: Choose the 3003MRS when you need both visual pressure indication and automated switching functions. This is particularly beneficial for applications requiring immediate control actionssuch as activating alarms or shutting down equipmentwhen pressure thresholds are reached.

Q: Where is the best location to install the Dwyer 3003MRS?

A: Install the Photohelic Switch/Gauge indoors on a panel or wall where the device will be protected from direct water exposure. Its NEMA 2 rating ensures suitability for indoor environments, such as equipment rooms or HVAC control panels.

Q: What is the process for connecting the pressure inputs to the instrument?

A: The 3003MRS features clearly marked high and low pressure ports with 1/8" NPT female threads. Use compatible fittings and tubing to connect these ports to your systems pressure lines, ensuring an airtight seal for accurate measurements and reliable switching.

Q: How does the Dwyer 3003MRS benefit HVAC or cleanroom operations?

A: The combination of visual pressure monitoring and dual switch controls allows for automatic response to changes in air pressure. This helps maintain optimal filter performance, ensure proper air flow regulation, and safeguard sensitive environments by quickly signaling or correcting deviations from set parameters.

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