Switches & potentiometers for fan speed controllers
Fans, motorized dampers, control valves and many other devices in your
ventilation project require an analogue control signal to regulate between
setpoints. This can be achieved by the use of switches, whether these are
passive control switches and active control switches. Passive control switches
are designed to manually adjust the speed of pole switching induction motors
while Active control switches can be used to manually generate a 0-10 VDC signal
in 3 or 4 steps.