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 humidity and temperature. Temperature and hysteresis (sensitivity) can be set on two knob's as well humidity and humidity-hysteresis on the other two knobs.

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.

Sizes and technical data's:

• Case: WxHxD = 200x250x180mm
• Controller: WxHxD = 265x300x205mm
• Designed for: 2,5A or 8A
• 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
• humidity accuracy ±4.5%rh
• Protection class IP54

Settings range:

• Temperature: 20C° - 30C°
• Temperature hysteresis: 2-8C°
• Humidity: 30% - 100%
• Humidity hysteresis: 6%-30%