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Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C

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Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C

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Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C Specification

Sensor Type
Photohelic Switch/Gauge

Thread
1/8 NPT Female

Display
Analog

Outer Size
4-1/2 inch (approximately 115 mm) dial

Seal Material
Silicone

Grade
Industrial

Material
Die-cast Aluminum Case, Polycarbonate Window

Dial Material
Polycarbonate

Pointer Material
Aluminum

Processing Type
Pressure Measurement

Diameter
4.53 in (115 mm)

Glass Size
115 mm

Mount Type
Panel Mount

Scale Range
0 to 30 in. W.C. (inch Water Column)

Accuracy
2% of Full Scale

Finishing
Matte Black Housing

Measure Pressure Of
Air and Compatible Gases

Accessories
Mounting Bracket, Screws, Gasket

Compliance
CE Marked

Switch Rating
5A @ 120/240 VAC

Electrical Connections
Screw Terminals

Number of Set Points
2 (SPDT Relays)

Enclosure Rating
IP54

Response Time
Fast-acting relays for switching

Weight
Approx. 1.4 lb (0.63 kg)

Temperature Range
20 to 120°F (-6.67 to 48.9°C)

Overpressure Limit
25 psi (1.7 bar)

Power Supply
120 VAC / 240 VAC, 50/60 Hz

Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C Trade Information

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

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

Main Domestic Market
All India

About Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C

Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C

Pressure switch/gage, range 0-30" w.c., 1.0 minor divisions.

Model: 3030MRS

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 3030MRS Photohelic, Switch/Gauge 0 to 30 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).

Dual Functionality: Gauge and Switch

The Dwyer 3030MRS Photohelic uniquely combines analog pressure indication with dual SPDT relay switching in one compact instrument. Users can both monitor air or compatible gas pressures and automate system responses at specified set points, enhancing process control and safety in industrial setups.

Built for Industrial Reliability

With its die-cast aluminum housing, polycarbonate window, and IP54 enclosure rating, the Photohelic 3030MRS is engineered to withstand harsh conditions. Its wide temperature range, matte black finish, and sealed construction ensure durability and consistent operation in manufacturing, HVAC, and process applications.

FAQs of Dwyer 3030MRS Photohelic,Switch/Gauge 0 to 30 in W.C:

Q: How do I install the Dwyer 3030MRS Photohelic Switch/Gauge?

A: The Dwyer 3030MRS is designed for easy panel mounting using the included mounting bracket, screws, and gasket. Electrical connections are made via screw terminals, and 1/8" NPT female threads facilitate pressure line attachment. Always ensure the device is securely mounted and wired according to the provided manual.

Q: What pressures can the Dwyer 3030MRS measure and control?

A: This instrument accurately measures and switches on pressures from 0 to 30 inches of water column (in. W.C.) for air and compatible gases. It is suitable for applications that require monitoring or controlling low to moderate positive or negative pressures within these boundaries.

Q: When should I use the switching relays on the Photohelic 3030MRS?

A: Use the dual SPDT relays to automate equipment or system responses when the monitored pressure reaches user-defined set pointsideal for alerting, controlling fans, dampers, or other devices where specific pressure activation is needed.

Q: Where is the Dwyer 3030MRS typically applied?

A: Common applications include industrial HVAC systems, clean rooms, filter monitoring, and process control panels. Its robust construction and IP54 protection allow use in both light and heavy-duty environments where air or compatible gas pressures need continuous monitoring and control.

Q: What are the benefits of using a Photohelic gauge/switch in industrial systems?

A: The integrated gauge and switching functionality streamlines pressure monitoring and control, reduces installation costs, and improves operational efficiency. Fast-actuating relays and clear analog display allow for immediate response and precise visual confirmation of system status.

Q: How does the fast-acting relay function improve process safety?

A: Rapid relay response ensures the system can immediately trigger alarms or actuator commands when pressure thresholds are crossed, minimizing risk and preventing equipment damage or process interruptions.

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