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.
![TEMPERATURE AND HUMIDITY STEP TRANSFORMER CONTROLLER 2 FAN (8 AMP) 1 TEMPERATURE AND HUMIDITY STEP TRANSFORMER CONTROLLER 2 FAN (8 AMP)](https://agroponix.com/wp-content/uploads/2021/03/lr_culcdcgse9001_temperature_and_humidity_step_transformer_controller_2_fan_8_amp-1.jpg)
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