Control switches and Potentiometers

This delayed off timer activates the exhaust fan in the bathroom or toilet when the light is switched on. After the light is switched off, the exhaust fan remains active during 2 to 10 minutes. After this time, the fan stops. The delayed off time can be adjusted via a trimmer. VTR-1 series are very compact and easy to install.

These control switches adjust the speed of 3-speed fans. They are available with or without OFF position. They transfer the mains to one of the three terminal blocks. This allows you to adjust the fan speed from minimum to maximum in 3 steps.

These control switches adjust the speed of EC fans in 3 steps. They can also control frequency inverters, fan speed controllers or damper actuators. They are available with or without OFF position. They divide the analogue 0-10 V control signal in three steps. This makes it possible to adjust the fan speed or the damper position from low to high in 3 steps.

A potentiometer generates an infinitely variable control signal, typically 0-10 Volt. This control signal can be used to control an EC fan, an AC fan speed controller, a frequency inverter or a damper actuator. Sentera has a wide range of potentiometers. Some potentiometers can generate different types of analogue signals, e.g. 0-20 mA or a modulating PWM signal. Some potentiometers require a supply voltage (24 Volt or 230 VAC), other types don't require a supply voltage.