United Kingdom 0800 488 488 | Intl +44 (0) 161 777 6611 | Welcome to our new website, found an issue or bug? Please report it here
Model-AAFS
Adjustable Air Flow Paddle Switch for HVAC - Stainless Steel Vane
- Adjustable air flow sensitivity from 200 to 1800 FPM
- High current (15 A) rated SPDT contact
- IP65 enclosure rating
Product Overview
- Air Flow, Max 1800 FPM
- Air Flow, Min 200 FPM
- Electrical Connection Cable Gland with Screw Terminal block
- Enclosure Ratings IP65
- Materials ABS
- Materials, Wetted Brass, Galvanized Steel, Stainless Steel
- Media Compatibility Clean dry air / inert gas, HVAC / room air, Inert / non-reactive gases, Nitrogen
- Mounting Orientation Horizontal Duct Flow
- Operating Temperature, Max 180 °F
- Operating Temperature, Min -40 °F
- Relative Humidity 10 to 90% Non-Condensing
- Series ID Model-AAFS
- Set Point Adjustment Internal Screw
- Switch Rating 5 (8) A @ 250 Vac
- Weight 380 g
Supported Applications
The Dwyer Model AAFS Adjustable Air Flow Paddle Switch is designed for air flow proving in HVAC systems. The series detects a wide range of air velocities with minimal user calibration, utilizing an internal screw to adjust the set point at which the SPDT snap switch engages.
Operating Conditions & Performance
The Model AAFS operates within specific environmental and process limits defined by its specifications. The unit is rated for ambient temperatures from -40 to 180°F (-40 to 85°C) and process temperatures from -14 to 185°F (-10 to 85°C). Humidity must remain between 10 to 90%, non-condensing. The switch is intended for horizontal duct flow applications with a service media of air and compatible gas.
Performance capabilities include an adjustable sensitivity range from 200 to 1800 FPM (1 to 9.2 m/s). The device features an IP65 enclosure rating and carries CE compliance approval.
Key Specifications
- Measurement Range: 200 to 1800 FPM (1 to 9.2 m/s)
- Ambient Temperature Limits: -40 to 180°F (-40 to 85°C)
- Process Temperature Limits: -14 to 185°F (-10 to 85°C)
- Humidity Limits: 10 to 90%, non-condensing
- Enclosure Rating: IP65
- Electrical Connection: Screw terminal with M18 x 1.5 cable gland
- Process Connection: Flange
- Mounting Orientation: Horizontal duct flow
Configuration Options
The Model AAFS series is configured with specific wetted materials and housing components to support its function in air velocity detection. The unit includes a stainless steel vane, brass lever, galvanized steel base, and an ABS enclosure.
- Switch Type: SPDT contact
- Electrical Rating: 15 (8) A @ 250 VAC
- Wetted Materials: Vane: SS; Lever: Brass; Base: Galvanized steel
- Housing Material: ABS
- Set Point Adjustment: Internal screw
- Weight: 13.6 oz (380 g)
Key Product Differences
The series is identified by the model code AAFS, described as an adjustable air flow paddle switch. The primary variation within this single-model family involves the field-adjustable set point range of 200 to 1800 FPM (1 to 9.2 m/s). No other distinct sub-families or alternative housing configurations are documented for this series.
PDFs & Manuals
