Dwyer Instruments SERIES AVFS Catalog Page
2 LED
POTENTIOMETER
[23.00]
SERIES AVFS
AIR FLOW SWITCH
Monitors Flow in Ducts with Contact Output and Local LED Indication
AIR QUALITY
5-33/64 [140.00]
29/32
The Series AVFS Air Flow Switch is specically designed to monitor air ow in ducts
and provides a 3 A contact output to indicate a change or loss of ow. The AVFS
provides a ±5% set point repeatability across a full-scale range of 1-10 m/s (197-1969
fpm) and includes a mounting bracket for quick duct mounting.
FEATURES/BENEFITS
• Integral red/green air ow status LED’s
• Flush sensor design limits issues due to dust or particulate in the air ow
• IP65 construction
APPLICATIONS
• Fan monitoring
• Filter monitoring
• Damper feedback
• Air handlers
MODEL CHART
Model Description
AVFS-1
80-250 AC/DC power thermo air ow switch
AVFS-2
24 VDC power thermo air ow switch
SPECIFICATIONS
Air Velocity Range: 197-1969 FPM (1-10 m/s).
Temperature Limits: 5 to 122°F (-10 to 50°C).
Humidity Limits: 0-90% RH.
Wetted Materials: PBT body, titanium sensor.
Pressure Limit: 14.7 psig (1 bar).
Housing: PBT.
Repeatability: ±5% FS.
Switch Type: N.O. SPST.
Electrical Rating: 3 A @ 30 VDC/250 VAC.
Response Time: 3-60 seconds. Varies with ow and set point.
Power Requirement: AVFS-1: 80 to 250 AC/DC (47 to 63 Hz AC); AVFS-2: 24
VDC ±25%.
Power Consumption: 3 VA.
Electrical Connection: 6.5´ (2 m) cable.
Enclosure Rating: IP65.
Display: 1 Red LED/1 Green LED.
Weight: 7.2 oz (203 g).
Agency Approvals: CE.
Air Flow Switches
DWYER INSTRUMENTS, INC.
213
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