The step transformer controller have the special characteristic that the ventilators make no noise "hum" in the lower rotation. The step transformer control the fan speed from self 6-step up/down according the temperature. Temperature as Hysteresis (sensitivity) can be set on two knob's. A internal hardware setting (Jumper) you can choose if the minimum speed is 0 "zero" off position or if the fan should keep working in the lowest step to prevent odors escaping.

The controller comes as a finished part and is ready to use. This reliable fan controller comes complete with a sealed water resistant cover, plugs with flap-lids and a low voltage sensor making it perfect for humid rooms. The sensor comes with a 4meter long cable and can be extended up to 50meters.

Sizes and technical data's:

Controller: WxHxD = 265x300x205mm
Designed for: 2,5A
Volts prim: 230V / 50HZ
Volts sec. 80V, 110V, 140V, 170V, 200V, 230V automatic-steps 50HZ
Digital sensor 5V Measures temperatures from -55°C to +125°C (-67°F to +257°F)
0.5°C accuracy from -10°C to +85°C
Protection class: IP44