FSPT – AIR : Air Flow Switch

Model : FSPT – AIR
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FSPT-AIR duct air flow switches is a kind of heating,cooling and air con-ditioning equipment,which is used to control and monitor air,non aggressive gases flow in ducts, chambers, etc. The duct air flow switch provides feedback of air flow in HVAC duct work.It can be connected directly to the control system as a feedback point or can be directly interlocked to prevent operation of heating and cooling equipment when there is no air flow. Stainless steel paddle
resists corrosion. Adjustable spring tension screw allows setting the air flow trip point. The paddle can be trimmed down for higher flow applications. The cable enters through the water tight gland, or the gland can be removed and replaced with an EMT or flex.

Features :
  • Renovated SPDT micro switch ensures the reliable switch function
  •  Stainless steel paddle
  • Cut-in and cut-out
  • Brass level
  • IP65 housing
  • 15(8A) 250VAC switch rating
  •  Max.liquid temp 120˚C
  • Max working pressure 13.5Bar


Additional information

Type of operation

On/Off, single-stage, micro switch


SPDT 15(8A) 24/250VAC


Min. 1.0 m/sec, Max. 8.0 m/sec


Min. 2.5 m/sec, Max. 9.2 m/sec

Flow rate setting adjustment

Internal screw

Sensing element


Paddle size

3.2 x 6.9 in. (80 x 175 mm)

Liquid applications

Air and non aggressive gases

Paddle material

Paddle material

- Housing

-40°F to 185°F (-40°C to 85°C)

- Paddle

14°F to 185°F (-10°C to 85°C)

Operating temperature

14°F to 185°F (-10°C to 85°C)

Permissible ambient humidity

10~90% RH, non-condensing

Cable entry

M18 fitting


Fire Resistance ABS,UL NO.E56070



Color White

Installation Duct mounted


Duct mounted