Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM

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Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM Specification

Sensor Type
Photohelic Differential Pressure Sensor

Bourdon Tube
Not Applicable (Diaphragm Operated)

Outer Size
Standard Panel Mount (refer to diameter)

Thread
1/8 NPT Female

Grade
Industrial

Seal Material
Silicone (for diaphragm seal)

Display
Analog + Setpoint Switch Indicators

Material
ABS Housing, Aluminum Backplate

Dial Material
Polycarbonate

Pointer Material
Aluminum

Processing Type
Injection Molded Housing

Diameter
145 mm (Front Bezel)

Glass Size
Approx. 130 mm Window

Mount Type
Flush or Surface Mount

Scale Range
0 to 100 MM of Water

Accuracy
2% Full Scale

Accessories
Mounting Bracket, Hardware, Terminal Connectors, Manual

Ingress Protection
IP54 (front when panel mounted)

Max Pressure
25 psi (1.7 bar)

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

Electrical Rating
5A @ 120/240 VAC

Mounting Hardware
Supplied

Power Supply Requirement
None for Gauge, Switch Power for Contacts

Weight
680 g (approx.)

Switch Type
SPDT (2 Switches)

Model Number
3000MRS

Compliance
RoHS

Switch Action
Adjustable, Settable Hi/Lo

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM Trade Information

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

Main Export Market(s)
Asia

Main Domestic Market
All India

About Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM

Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM

Series 3000MR/3000MRS Photohelic® Switch/Gage

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

Model	Description
3000MRS-100 MM	Pressure Switch/Gage,Range 0-100 MM, 2.0 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

Advanced Differential Pressure Monitoring

The Dwyer 3000MRS utilizes a diaphragm-operated sensor for accurate, reliable detection of pressure across steam, oil, and gas systems. Its analog display, complemented by adjustable Hi/Lo setpoint switches, supports users in maintaining optimal operational parameters while facilitating rapid response to pressure deviations. This ensures consistent system safety and efficiency.

Durable Construction for Industrial Use

Engineered with a molded ABS housing, aluminum backplate, and a robust silicone seal, the Dwyer 3000MRS stands up to demanding industrial environments. IP54 ingress protection (when panel mounted) guards against dust and moisture, while the lightweight design and easy mounting hardware streamline installation across varied setups.

FAQ's of Dwyer 3000MRS Photohelic Switch/Gauge 0 to 100 MM:

Q: How is the Dwyer 3000MRS Photohelic Switch/Gauge typically installed?

A: The Dwyer 3000MRS comes with supplied mounting hardware for both flush and surface mounting, making it suitable for standard panel installation. Detailed instructions and a mounting bracket are included to ensure secure and straightforward setup.

Q: What kinds of applications benefit from using this gauge?

A: This model is well-suited for monitoring and controlling differential pressure in industrial setups dealing with steam, oil, or gas. Its versatility makes it ideal for HVAC, process control, and filtration systems where precise pressure management is crucial.

Q: When should I adjust the Hi/Lo setpoints on the switches?

A: Adjust the Hi/Lo setpoints whenever your operational safety limits or process requirements change. This feature allows you to tailor the gauge's switching response to your system's specific pressure thresholds, enhancing safety and process control.

Q: Where should the Dwyer 3000MRS be mounted for optimal use?

A: For best results, panel mounting the device in a location protected from excessive moisture and physical damage is recommended. The IP54 rating applies only to the front when panel mounted, ensuring effective resistance to dust or splashes in most control panels.

Q: What is the process for wiring the SPDT switches?

A: The gauge includes two SPDT switches, each rated at 5A @ 120/240 VAC. Terminal connectors are provided for easy and secure wiring. Follow the supplied manual to connect the switches to your control circuitry, ensuring all power sources are isolated during installation.

Q: How does this device operate without an external power supply for the gauge function?

A: The analog measurement function is purely mechanical, requiring no electrical power. Only the switch contacts require external power, making the device highly reliable in environments where power availability may be inconsistent.

Q: What are the key benefits of using the 3000MRS model over similar devices?

A: Key advantages include its dual adjustable switch design for custom pressure thresholds, robust ABS and aluminum construction, and reliable, high-accuracy (2% FS) diaphragm sensing. The absence of a need for gauge power enhances installation flexibility and dependability in varied applications.

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