Electric accessories : To our fans, we provide a full range of electrical accessories such as controllers, humidity controllers, air quality sensors, transformers, thermostats, and switches. Ventur speed controller adjusts the rotational speed of the motor by changing the motor supply voltage. We have models where the voltage is regulated gradually with either a transformer or a thyristor. Regulators of type transformer can be supplied in one-phase and three-phase versions, and controllers of thyristor type are available as a single-phase version. The controllers are available as variable, two-step and with automatic control. Ventur humidity control is used to automatically start the fan if the relative humidity will be over a specified set level. With the help of our air quality sensor, the fan is started automatically from different levels of pollutants such as gases, unpleasant odours, cigarette smoke, humidity, and more. With the help of our thermostats can fan stats automatically depending on ambient temperature. : Electric accessories