Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch

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Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch Specification

Thread
1/4 NPT Female

Display
No

Seal Material
Nitrile

Sensor Type
Diaphragm Differential Pressure Sensor

Outer Size
108 x 98 x 58 mm (approx.)

Grade
Industrial

Material
Aluminum Case, Brass Wetted Parts

Processing Type
Mechanical

Mount Type
Wall Mount

Scale Range
0.2 to 3.0 bar

Accuracy
0.5% of F.S.

Finishing
Powder Coated

Measure Pressure Of
Air and Non-corrosive Gases

Accessories
Mounting Screws, Instruction Manual

Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch 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, Eastern Europe, Middle East, Western Europe, Africa, Central America, South America, Asia, North America

Main Domestic Market
All India

About Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch

Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch

Series BDPA Adjustable Differential Pressure Alarm .20-2.00" w.c.

24 Volt or Battery Powered, Built-in Audible and Visual Alarm

The Series BDPA Adjustable Differential Pressure Alarm with built-in audible and visual set point indication is designed for overpressure, vacuum, and differential pressure applications. The scaled adjustment knob allows changes to the switching pressure to be made without a pressure gage. The silicone diaphragm and PA 6.6 body make the Series BDPA perfect for use with air and other noncombustible gases.

The Series BDPA Adjustable Differential Pressure Alarms offer a versatile range of configurations allowing utilization of their many features. The BDPA can be powered by battery or 24 VDC/VAC line power. If connecting line power, the battery can act as back-up power in case of power outage. When set point threshold is reached, a local loud audible buzzer and bright LED will indicate periodically notifying of set point activation. An SPDT contact may also be wired to send a signal remotely to a DDC or building management system. A snooze button located through an opening in the cover can be pressed by the user to manually disengage the audible and visual indication until a maintenance operation is performed. If the instrument is mounted where it is difficult to access, a remote contact may be connected allowing the user to deactivate the buzzer and LED at the remote contact location.

The Series BDPA Differential Pressure Alarm's great functional versatility makes it perfect for filter, fan, and ventilation applications or any retrofit job where installing electrical wiring proves cost-prohibitive.

Note: For a 1/2" npt connection, use the 1/2" conduit fitting adapter (A-483).

Approvals

Reduction of Hazardous Substance (RoHS)
CE Approval

Specification

Service	Air and noncombustible, compatible gases
Wetted Materials	Diaphragm: Silicone; Housing: Switch Body: PA 6.6 and POM; Cover: Polystyrene
Temperature Limits	32 to 122°F (0 to 50°C)
Pressure Limits	40" w.c. (10 kPa)
Electrical Rating	1.0 A @ 30 VDC/VAC
Switch Type	SPDT
Alarm Indicationrm.	Red LED and audible alarm
Alarm Level	Approximately 90 db at 4" (10 cm)
Alarm Acknowledge	Button press
Power Requirements	16 to 30 VDC, 18 to 30 VAC or 3.6 V LS14250 lithium metal battery, installed functional, user replaceable. Battery acts as back-up if power is lost
Battery Life	Approximately 1.5 years with 3.6 V/1.2 Ah
Repeatability	±15% FS
Electrical Connections	Screw terminals. M20x1.5 with cable strain relief or optional 1/2" NPT connection
Process Connections	5/16" (7.94 mm) outside diameter tubing, 1/4" (6.0 mm) inside diameter tubing
Mounting Orientation	Vertically, with pressure connections pointing downwards
Enclosure Rating	IP21
Weight	6.1 oz (173 g)
Agency Approvals	CE, RoHS

Reliable Differential Pressure Monitoring

Engineered with an adjustable differential range of 0.2 to 2.0 bar, the Dwyer BDPA-03-2-N delivers precise monitoring for air and non-corrosive gases. Its industrial-grade diaphragm sensor and quick response time make it suitable for critical HVAC and process control applications.

Versatile Installation and Adjustment

This switch features an external knob for seamless set point adjustments, eliminating the need for case disassembly. The unit is wall mountable and includes mounting screws and an instruction manual, streamlining installation and reducing downtime.

Robust and Durable Construction

Housed in a powder-coated aluminum case with brass wetted parts, the BDPA-03-2-N guarantees endurance in demanding industrial settings. Its IP54 protection guards against dust and splashes, while a nitrile seal ensures compatibility with a range of non-corrosive gases.

FAQs of Dwyer BDPA-03-2-N Adjustable Differential Pressure Switch:

Q: How do I adjust the set point on the Dwyer BDPA-03-2-N pressure switch?

A: You can modify the set point externally using the adjustment knob located on the switch. This allows for rapid changes to the pressure setting without needing to open the device or interrupt installation.

Q: What applications is the BDPA-03-2-N suitable for?

A: This switch is ideal for monitoring and controlling differential pressure in HVAC systems, air handling units, industrial air compressors, and other systems handling air or non-corrosive gases.

Q: When should I choose an SPDT pressure switch like this model?

A: An SPDT (Single Pole Double Throw) switch is beneficial when you require both a normally open and a normally closed contact for flexible control circuits, making it suitable for safety, alarm, and process automation purposes.

Q: Where is this differential pressure switch typically mounted?

A: The unit is designed for wall mounting and is supplied with the necessary screws and instruction manual to ensure a secure and straightforward installation.

Q: What is the process for connecting electrical wiring to this pressure switch?

A: Electrical connections are made through the provided screw terminals. Ensure the power supply is off before connecting wires, following the instructions to guarantee a safe and robust connection.

Q: What are the benefits of the aluminum case and brass wetted parts?

A: The aluminum case delivers excellent durability and corrosion resistance, while brass wetted parts ensure compatibility with non-corrosive gases, enhancing the switchs longevity and reliability in challenging environments.

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