A field-adjustable paddle-type air flow switch covering 200–1800 FPM with an IP65-rated housing and stainless steel vane, designed for straightforward duct air proving with minimal calibration requirements.
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Part No. AAFS | Velocity Range: 200–1800 FPM
The Dwyer AAFS provides a simple solution for duct-mounted air proving applications. Its stainless steel vane senses air velocity across a 200–1800 FPM range, while the internal set-point screw allows the trip point to be adjusted without a full recalibration procedure.
The SPDT switch is rated 15(8) A at 250 VAC. A galvanized steel base, brass lever, stainless steel vane, and ABS IP65 housing provide a practical construction for typical mechanical-room environments where dust and moisture may be present.
The AAFS is designed for horizontal duct airflow and uses screw terminals with an M18 x 1.5 cable gland for electrical connection and a sealed cable entry.
This Dwyer Instruments air flow switch is available through GeneralTech Shop. Contact our team if you need help confirming whether the AAFS is the correct variant for your application.
Ready to order the AAFS? Speak to our team. Call +971 6 5436933.
Key Benefits
- Field-adjustable air velocity sensing from 200 to 1800 FPM
- Internal set-point screw for adjusting the trip point without full recalibration
- IP65-rated ABS housing for protection against dust and moisture
- SPDT switch rated 15(8) A at 250 VAC
- Stainless steel vane with brass lever and galvanized steel base
- M18 x 1.5 cable gland for a clean, sealed electrical entry
- Designed for horizontal duct airflow applications
Who This Product Is Best For
- HVAC contractors installing duct air-proving systems
- Mechanical contractors working on ventilation and air-handling equipment
- Building maintenance teams monitoring duct airflow
- Technicians who need a straightforward, field-adjustable air flow switch
- Applications where a mechanical proof-of-flow switch is preferred over an electronic transmitter
How to Use
- Mount the AAFS on the duct with the vane correctly oriented for horizontal airflow.
- Connect the electrical wiring through the M18 x 1.5 cable gland to the screw terminals.
- Adjust the internal set-point screw to the required trip point within the 200–1800 FPM range.
- Establish airflow and verify that the SPDT switch changes state correctly at the required airflow condition.
- Confirm proper operation after installation and adjustment.
Frequently Asked Questions
What air velocity range does the Dwyer AAFS cover?
The AAFS covers 200–1800 FPM and allows field adjustment through its internal set-point screw.
What type of switch does the AAFS use?
It uses an SPDT switch rated 15(8) A at 250 VAC.
What is the enclosure rating of the AAFS?
The AAFS has an IP65-rated ABS housing, providing protection against dust and water exposure.
Can the AAFS be mounted in any duct orientation?
The AAFS is designed for installation with horizontal duct airflow.
What materials are used in the AAFS construction?
The assembly uses a stainless steel vane, brass lever, galvanized steel base, and ABS housing.
How is the AAFS electrically connected?
Electrical wiring is connected through screw terminals with an M18 x 1.5 cable gland.
Does the AAFS require full recalibration when changing the trip point?
The internal set-point screw allows the airflow trip point to be adjusted within the specified range without a full recalibration procedure.
Does GeneralTech Shop deliver the AAFS 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 AAFS?
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.
