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Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch

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Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch

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Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch Specification

Outer Size
125 mm (Approximate)

Grade
Industrial

Sensor Type
Differential Pressure Switch

Display
Mechanical (Non-digital)

Thread
NPT 1/4

Seal Material
Nitrile Rubber

Material
Stainless Steel / Pressure Cast Aluminum

Dial Material
Aluminum

Pointer Material
Polycarbonate

Processing Type
Machined

Diameter
125 mm

Glass Size
100 mm

Mount Type
Panel Mount

Scale Range
0.08 to 0.8 Bar

Accuracy
2% of Full Scale

Finishing
Powder Coated

Measure Pressure Of
Air, Non-corrosive Gases

Accessories
Mounting Screws Included

Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch Trade Information

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

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

Main Domestic Market
All India

About Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch

Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch

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 BDPA is available with settings from 0.08" w.c. (20 Pa) to 20" w.c. (5000 Pa). 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).

Product Applications

Air filter and ventilator monitoring
Industrial cooling circuits
Fire-protection damper control
Ventilation duct monitoring
Fan heater overheating protection
Heat exchanger frost protection

PRODUCT DESCRIPTION Dwyer Instruments BDPA-08-2-N, Adjustable differential pressure alarm, range .08-1.20 w.c., M20 connection.
Adjustable differential pressure alarm, range .08-1.20 w.c., M20 connection.
24 Volt or Battery Powered, Built-in Audible and Visual Alarm

Item Specifications

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/span>
Switch Type: SPDT.
Alarm Indicationrm.: Red LED and audible alarm.
Alarm Level: Approximately 90db at 4 (10 cm).
Alarm Acknowledge: Button preSS.
Power Requirements: 16 to 30 VDC, 18 to 30 VACor 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.
Weight: 6.1 oz (173 g).
Enclosure Rating: IP21.
Agency Approvals: CE, RoHS.

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Robust Industrial Design

Engineered for industrial use, the BDPA-08-2-N offers reliable performance in demanding conditions. Constructed from stainless steel or pressure cast aluminum with a powder-coated finish, it effectively resists corrosion and mechanical stress. Its NPT 1/4 thread and panel-mount capability ensure secure installation, while IP54 enclosure rating allows use in areas exposed to dust and moderate moisture.

Flexible and Precise Adjustability

The pressure switch provides a user-friendly screw-type set point adjustment, allowing precise control from 0.08 to 0.8 Bar with an impressive 2% accuracy. The SPDT micro switch, rated at 5A @ 250VAC, supports a variety of control systems and loads. Manual or automatic reset options adapt to diverse application needs, while a clear mechanical display aids quick on-site checks.

Applications and Benefits

Designed to measure differential pressure in air and non-corrosive gas systems, the BDPA-08-2-N is a trusted choice for monitoring filters, blowers, or cleanroom environments. Its industrial-grade construction ensures longevity, while compliance with CE standards offers peace of mind. Mounting hardware is included for convenience, and its compatibility with standard panels simplifies integration.

FAQs of Dwyer BDPA-08-2-N Adjustable Differential Pressure Switch:

Q: How is the set point adjusted on the Dwyer BDPA-08-2-N pressure switch?

A: The set point on the BDPA-08-2-N is adjusted using a screw-type mechanism. This allows precise and straightforward changes within the 0.08 to 0.8 Bar range, enabling users to tailor the response to specific system requirements.

Q: What is the typical usage of this differential pressure switch?

A: The BDPA-08-2-N is commonly used in industrial systems to monitor air and non-corrosive gas pressures. It is ideal for applications like filter monitoring, blower control, and maintaining pressure in cleanroom environments, ensuring system safety and efficiency.

Q: When should the manual or automatic reset feature be chosen?

A: Choose the manual reset option when you want the switch to require human intervention after activation, which is useful for safety-critical systems. The automatic reset is beneficial in applications where continuous operation is desired without manual restarts after a pressure event.

Q: Where can this pressure switch be installed in a facility?

A: Thanks to its panel mount design and NPT 1/4 inch thread, the BDPA-08-2-N can be easily installed in control panels, HVAC units, or on process equipment where space and accessibility are factors. Its IP54 enclosure rating allows usage in moderately dusty and damp environments.

Q: What steps are involved in the installation process?

A: Installation involves securing the unit to a panel using included mounting screws, connecting pressure lines to the NPT 1/4 threads, and wiring the SPDT micro switch to your control system. Ensure the area complies with the operating temperature range (-20C to +60C) for optimal performance.

Q: What advantages does the mechanical, non-digital display provide?

A: The mechanical display enables quick visual verification of pressure status without requiring external power or digital interfaces, making inspections straightforward and reliable, especially during maintenance.

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