Airflow Monitor

Model NO.:LCF 013

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 the direction of air. Its simple mechanical operation makes it a viable alternative to electronic monitoring systems.

1.Mechanical switch contact
2.Versatile fields of application
3.Small size
4.Easy to connect


The LCF 013 is used as a signal contact to monitor fans or filter fans in stationary, self-contained Protection Class I enclosures. It can be connected to monitoring systems with remote control or can directly switch alarm devices, such as LED’s or signal lamps. Loads with capacities exceeding the indicated switching capacity must be switched via a relay, e.g. our electronic relay SM 010. The airflow monitor with NC contact closes upon loss of air movement, i.e. it indicates fan failure (e.g. red signal lamp). The NO contact closes when fan is in operation and serves as optical function display (e.g. green signal lamp).

Technical Data
Contact type reed / magnet contact
Normally Closed (NC) switch contact open when air is flowing
Normaliy Open (NO) switch contact closed 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 10W (resistive load)
Switching threshold of airflow velocity > 2.5m/s (hysteresis: > 1m/s)
Max. airflow velocity 50m/s
Contact resistance < 370m Ω (with wire)
Max. air humidity 70% RH (not precipitating)
Service life >100,000 cycles
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
Operating / Storage temperature -20 to +50℃(-4 to +122○F) / -20 to +80℃ (-4 to+176○F)
Protection type IP20

Note: The product of switching voltage and switching current must not exceed 10W. The max. voltage and max. current must not be exceeded, not even short-term (voltage/current peaks). The resulting voltage and current peaks of inductive or capacitive loads must be restricted by a contact protection circuit.

Mechanical switch contact

Description Art. No. ( NC ) Art. No. ( NO ) Dimensions Weight
Air monitor integrated in protective grille
( plastic ) LCF 013
LCF 013000 LCF 013001 120 x 120 X 10mm 36g

Go to Products List