Dwyer Instruments DAFA-1 | Air flow indicator and alarm
The Dwyer DAFA-1 is a battery-powered air flow indicator and alarm designed for radon mitigation systems and low-CFM vent or exhaust pipes. A field-trimmable vane activates an 85 dB siren and red LED when airflow drops below the selected actuation point, while a yellow LED indicates low battery. A user-replaceable 3 V CR2450 lithium battery provides approximately five years of steady-state monitoring. Genuine Dwyer Instruments stock at General Tech Services LLC, Saudi Arabia, with free Saudi Arabia shipping. Request a quote in under a minute - call +966 569 289 544.
Product Overview
Radon mitigation systems and small exhaust installations often depend on a fan operating continuously, sometimes in locations where the fan and vent pipe are not immediately visible. If the fan stops or airflow falls, an independent airflow alarm can provide immediate local notification.
The Dwyer DAFA-1 monitors airflow in a vent pipe using a lightweight, field-trimmable vane. When airflow drops below the actuation point, the unit activates an 85 dB siren measured at 1 foot and illuminates a red LED to indicate the airflow failure.
The vane can be trimmed for common small-pipe applications, with a 15 CFM actuation point in a 4-inch pipe or 10 CFM in a 3-inch pipe. This allows the same unit to be adapted to either pipe size during installation.
The DAFA-1 operates from a user-replaceable 3 V CR2450 lithium battery, eliminating the need for wiring or a nearby power outlet. Battery life is approximately five years during steady-state monitoring, while the alarm can operate continuously for up to 48 hours.
A separate yellow LED provides a low-battery warning, helping ensure the monitoring device does not become inactive without indication. The housing combines ABS and polycarbonate, with a rare-earth magnet used in the design. The unit mounts vertically, weighs approximately 113 g and is CE approved.
The operating temperature range is 0 to 50°C, so installations in hot Saudi Arabian environments should be located indoors or in a shaded area that remains within the specified temperature range.
Key Benefits
- 85 dB siren and red LED activate when airflow drops below the actuation point
- Field-trimmable vane for 4-inch and 3-inch vent pipe applications
- 15 CFM actuation for 4-inch pipe
- 10 CFM actuation for 3-inch pipe
- No wiring or mains power required
- User-replaceable 3 V CR2450 lithium battery
- Approximately five years of battery life during steady-state monitoring
- Up to 48 hours of continuous alarm operation
- Separate yellow LED provides low-battery warning
- Compact and lightweight ABS/polycarbonate construction
- Vertical mounting
- Genuine Dwyer Instruments stock with free Saudi Arabia shipping
Call +966 569 289 544 for pricing and stock availability.
Who This Product Is Best For
- Radon mitigation installers requiring an independent fan-failure alarm
- Low-CFM exhaust and vent-pipe applications in laboratories, stores and small plant rooms
- Sites where electrical power is not conveniently available near the vent pipe
- Property managers wanting visible and audible confirmation of fan operation
- Contractors installing 3-inch or 4-inch vent systems
- Maintenance teams requiring a simple battery-powered airflow monitor
How to Use / How It Works
- Trim the vane according to the pipe application: 15 CFM for a 4-inch pipe or 10 CFM for a 3-inch pipe.
- Install the 3 V CR2450 lithium battery and mount the DAFA-1 vertically on the vent pipe.
- Run the fan and verify that the unit remains in its normal monitoring state while adequate airflow is present.
- Stop the fan or reduce airflow and confirm that the 85 dB siren and red LED activate.
- Verify the low-battery indicator and overall alarm operation before completing the installation.
Frequently Asked Questions
What does the Dwyer DAFA-1 do?
The Dwyer DAFA-1 monitors airflow in a vent pipe and activates an 85 dB alarm and red LED when airflow drops below the selected actuation point.
What pipe sizes does the DAFA-1 suit?
The field-trimmable vane is designed for 15 CFM operation in a 4-inch pipe or 10 CFM operation in a 3-inch pipe.
How long does the DAFA-1 battery last?
The 3 V CR2450 lithium battery provides approximately five years of steady-state monitoring under the specified operating conditions.
How will I know when the battery is low?
A separate yellow LED provides a low-battery warning, indicating that the CR2450 battery should be replaced.
Does the DAFA-1 need wiring or mains power?
No. The DAFA-1 is battery powered and uses a user-replaceable 3 V CR2450 lithium cell.
How loud is the alarm?
The alarm produces an 85 dB siren measured at 1 foot.
How long can the alarm sound continuously?
The alarm can operate continuously for up to 48 hours.
Can the DAFA-1 be installed outdoors in Saudi Arabia?
The specified operating temperature is 0 to 50°C. For Saudi Arabian installations, select an indoor or shaded location that remains within this temperature range.
Is the Dwyer DAFA-1 suitable for radon mitigation systems?
Yes. Its airflow monitoring and audible/visual alarm functions are designed for applications such as radon mitigation fan monitoring and other low-CFM vent-pipe systems.
Is the Dwyer DAFA-1 genuine stock?
Yes. General Tech Services LLC supplies genuine Dwyer Instruments products in Saudi Arabia with free Saudi Arabia shipping. Call +966 569 289 544 for pricing and stock availability.
Request a Quote Today
Get the Dwyer DAFA-1 air flow indicator and alarm delivered free anywhere in Saudi Arabia.
Call +966 569 289 544 | www.generaltechshop.sa
