The airflow monitor (NC/ NO) is designed to indicate the loss of air movement of a fan or filter fan.The contact detects the loss of air movement caused by fan failure or blocked filter media regardless of direction of air. Its simple mechanical operation makes it a viable alternativeto electronic monitoring systems.
Airflow Sensor Features:
Caontact type: read / magnet
Normally closed (NC) switch contact close when air is flowing
Normally open (NO) switch contact open when air is flowing
Max. Switching voltage NC: 240VDC (UL), 240V AC/DC (VDE)/NO:60VDC
Max. Switching current NC: DC 500mA / NO: DC 170mA
Max.Switching capacity 1ow(resistive load)
Switching threshold of airflow velocity > 2.5m/s (hysteresis: > 1m/s)
Max. Airflow velocity 50m/s
Contact resistance < 370mOhm (with wire)
Max.Air humidity 70%RH (not precipitating)
Service life > 100 000 cycles
Connection 2 x single strand AWG 28, length 500mm, tip of stranded wire 5mm stripped and tinned (NC: Black,NO: Blue)
Mounting alternatively integrated in protective grille (see table), mounting clamp or mounting clip
Casing plastic according to UL94-HB, black
Fitting position bidirectional tab perpendicular to airflow
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