GSE Controller Temperature & Min-Max Hysteresis Speed Overview This digital temperature, minimum/maximum- speed controller with hysteresis setting is a temperature-dependent speed controller for ventilated rooms with one or more exhaust fans (up to 600 watt). The controller keeps the temperature constantly and impedes to run under the set minimum-speed, as well to run over the set maximum speed. The hysteresis defines the temperature range. It can be easily controlled, adjusting the required temperature minimum-, maximum speed and hysteresis on four knobs. Ready to use, this reliable fan controller comes complete with: Sealed water resistant cover Plugs with flap-lids and a low voltage sensor making it perfect for humid rooms. Protection class IP44 Digital sensor supplied with 4 metre cable 2.5 amp maximum All G.S.E products are engineered and manufactured in Europe and are available exclusively from Growth Technology retailers.