GSE Temp & Minimum Fan Speed (1 Amp)
The simplest controller in the range, with a single socket for an out-take fan. It features two knobs: one sets the room temperature and the other sets the minimum fan speed.
GSE Temp & Max / Min Hysteresis Speed (2.5 Amp)
This controller is the bigger brother of the model mentioned above. It comes with the same features, but also includes two extra knobs. One of these knobs regulates the maximum fan speed. This is useful when running a larger fan than needed because you can prevent it from hitting its full capacity (if necessary). The other knob allows you to set the hysteresis. Think of hysteresis as 'responsiveness'. It tells the controller how far conditions can deviate before fan speeds are altered.
