Dwyer BDPA-05-2-N Adjustable Differential Pressure Switch
Description
Series BDPA Adjustable Differential Pressure Alarm .80-4.00" 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
CE Approval
Reduction of Hazardous Substance (RoHS)
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 |

Price:
Processing Type : Other, Factory Calibrated
Seal Material : Nitrile Rubber
Accuracy : 15% of Full Scale
Grade : Industrial
Material : Other, Die Cast Aluminum Housing
Accessories : Mounting Bracket, Instruction Manual
Processing Type : Other, Factory Calibrated
Seal Material : Silicone Rubber
Accuracy : 2% of Full Scale
Grade : Industrial
Material : Other, ABS Plastic Housing
Accessories : Mounting Screws Included
Processing Type : Other, Analog pressure switching
Seal Material : EPDM
Accuracy : 15 Pa
Grade : Industrial Grade
Material : Other, Plastic housing with metal internal components
Accessories : Mounting screws supplied
Processing Type : Other, Adjustable Set Point Mechanism
Seal Material : Silicone
Accuracy : 15% of set point
Grade : Industrial Grade
Material : Other, ABS Plastic
Accessories : Two plastic duct connectors, mounting screws, and pressure tubes