Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch

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Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch

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Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch Specification

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

Seal Material
Buna-N

Sensor Type
Photohelic differential pressure switch/gauge

Display
Analog

Bourdon Tube
Not Applicable (Diaphragm sensing element)

Thread
1/8 female NPT high and low pressure connections

Grade
Industrial

Material
Die cast aluminum case, polycarbonate lens, Buna-N diaphragm

Dial Material
Metal, white background with black markings

Pointer Material
Black aluminum

Processing Type
Precision mechanical and electrical assembly

Diameter
4-9/16 inches

Glass Size
4 inches viewing area

Mount Type
Panel mount (standard), surface mount optional

Scale Range
0 to 15 inches of water column (in. w.c.)

Accuracy
±2% of full scale

Accessories
Mounting bracket, two plastic tubing ferrules, and instructions

Mounting Orientation
Vertical preferred for best accuracy

Operating Temperature
20F to 120F (-6.7C to 49C)

Compliance
RoHS Compliant

Power Supply
120 VAC, 50/60 Hz Standard (optional: other voltages)

Application
HVAC, Cleanrooms, Filter Monitoring, Air Flow Measurement

Enclosure Rating
NEMA Type 1 (General Purpose)

Setpoint Adjustment
External Knob for Dual Setpoints

Repeatability
1% of Full Scale

Overpressure Limit
25 psi (1.7 bar) Maximum

Electrical Switching
SPDT Relay, 5A @ 120/240 VAC (Setpoint Control)

Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch Trade Information

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

Main Export Market(s)
Asia

Main Domestic Market
All India

About Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch

Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch

Series 3000MR/3000MRS Photohelic Switch/Gage

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

Model	Description
3015MRS-15 inch	Pressure Switch/Gage,Range 0-15 inch, .50 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 70F
Pressure Limits	-20" Hg to 25 psig
Temperature Limits	20 to 120F
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

Precise Dual Setpoint Control for Industrial Applications

The Dwyer 3015MRS Photohelic provides immediate and accurate differential pressure measurement, coupled with adjustable dual setpoints using an external knob. This enables automatic control of processes such as air filter monitoring, airflow detection, and environmental safety in HVAC and cleanroom environments. The blend of visual analog readout and robust relay output streamlines both measurement and automated response, ensuring optimal protection and performance.

Durable Construction and User-Friendly Design

Engineered with an industrial die-cast aluminum case and polycarbonate lens, the 3015MRS stands up to demanding environments. Its NEMA Type 1 rating, Buna-N diaphragm and seals, and precise mechanical assembly ensure reliability and longevity. The large 4-1/2 inch dial with clear markings allows users to quickly interpret readings, while the kits included accessories simplify installation and setup.

FAQs of Dwyer 3015MRS Photohelic Switch/Gauge 0 to 15 inch:

Q: How do I adjust the setpoints on the Dwyer 3015MRS Photohelic Switch/Gauge?

A: Setpoints are adjusted using the conveniently located external knob on the front of the unit, allowing you to set and fine-tune two independent switching points without disassembly.

Q: What applications is the Dwyer 3015MRS suitable for?

A: This model is ideal for monitoring and controlling air and compatible gas pressure in HVAC systems, cleanrooms, filter banks, and airflow measurement applications, thanks to its reliable switching and measurement capabilities.

Q: When should the gauge be mounted vertically, and why?

A: For optimum accuracy and repeatability (1% of full scale), the unit should be installed in a vertical orientation as recommended by the manufacturer.

Q: Where are the pressure connections located, and what size are they?

A: The 3015MRS features 1/8 female NPT high and low pressure connections positioned on the gauge housing for secure and straightforward integration with air lines or compatible gas tubing.

Q: What benefit does the Photohelic differential switch/gauge offer over standard pressure gauges?

A: Apart from visual analog measurement, the Photohelic includes relay-based electrical switching for automated setpoint control, enhancing process safety and efficiency in critical ventilation and monitoring systems.

Q: How do I power the Dwyer 3015MRS device?

A: The standard power supply requirement is 120 VAC at 50/60 Hz, though other voltage options are available upon request.

Q: What is included with the gauge for installation?

A: Each unit ships with a mounting bracket, two plastic tubing ferrules, and user instructions, simplifying panel or surface installation in your system.

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