A battery-powered air flow alarm with an 85 dB siren and red LED, designed for radon mitigation and low-CFM pipe air flow monitoring.
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Part No. DAFA-1 | Actuation Flow: 15 CFM (4" Pipe) / 10 CFM (3" Pipe)
The Dwyer DAFA-1 provides a simple way to monitor air circulation in radon mitigation systems and other low-flow pipe applications. Its field-trimmable vane senses airflow and triggers an audible and visual alarm when flow drops below the specified actuation threshold of 15 CFM on a 4" pipe or 10 CFM on a 3" pipe.
The alarm combines an 85 dB siren measured at 1 foot with a red LED to indicate a no-flow condition. A separate yellow LED provides a low-battery warning, helping users replace the battery before monitoring is interrupted.
The DAFA-1 is powered by a user-replaceable 3V CR2450 lithium battery, providing approximately five years of steady-state monitoring. It can also provide up to 48 hours of continuous alarm operation if a flow-loss condition remains unaddressed.
The compact construction and built-in rare-earth magnet mounting make the DAFA-1 practical for pipe-mounted airflow monitoring applications.
Ready to order the DAFA-1? Speak to our team. Call +971 6 5436933.
Key Benefits
- Field-trimmable vane for 15 CFM actuation on 4" pipes or 10 CFM on 3" pipes
- 85 dB audible siren with red LED for no-flow conditions
- Separate yellow LED for low-battery indication
- Approximately five-year battery life during steady-state monitoring
- Up to 48 hours of continuous alarm operation
- User-replaceable 3V CR2450 lithium battery
- Compact ABS/polycarbonate construction
- Rare-earth magnet mounting for straightforward installation
Who This Product Is Best For
- Radon mitigation installers and technicians
- Contractors monitoring radon mitigation fan operation
- Building maintenance teams working with low-CFM pipe systems
- Technicians requiring a self-contained air flow alarm
- Applications where an audible and visual warning is required when pipe airflow stops
How to Use
- Trim the field-adjustable vane according to the pipe diameter and required airflow threshold.
- Mount the DAFA-1 in the recommended vertical orientation using the built-in magnet or appropriate mounting hardware.
- Confirm that the red LED and audible alarm remain inactive during normal fan operation.
- Test the alarm by verifying its response when airflow falls below the specified actuation point.
- Replace the CR2450 battery when the yellow low-battery LED activates.
Frequently Asked Questions
What flow rate triggers the DAFA-1 alarm?
The DAFA-1 actuates at 15 CFM on a 4" pipe or 10 CFM on a 3" pipe using the field-trimmable vane.
How loud is the DAFA-1 alarm?
The audible siren is rated at least 85 dB when measured at 1 foot.
What does the red LED indicate?
The red LED indicates a no-flow condition when the airflow drops below the set actuation threshold.
What does the yellow LED indicate?
The yellow LED provides a low-battery warning, separate from the red no-flow alarm.
What battery does the DAFA-1 use?
It uses a user-replaceable 3V CR2450 lithium battery.
How long does the battery last?
The battery provides approximately five years of steady-state monitoring. Continuous alarm operation can last up to 48 hours.
Is the DAFA-1 designed specifically for radon mitigation?
It is commonly used for radon mitigation fan monitoring, but it can also be used for other low-CFM pipe airflow alarm applications.
How is the DAFA-1 mounted?
The unit can be mounted in vertical orientation using its built-in rare-earth magnet or suitable mounting hardware.
Does GeneralTech Shop deliver the DAFA-1 across the UAE?
Call +971 6 5436933 and our team will confirm delivery availability and timelines for your emirate.
Is a calibration certificate available for the DAFA-1?
Calibration and certification availability should be confirmed with our team when ordering. Call +971 6 5436933 for details.
For pricing or to place an order, contact GeneralTech Shop. Call +971 6 5436933.
