Techne invented the “Clip on” thermoregulator in 1948 and now offers four “Clip on” units. Thermoregulators are designed to be used with the Techne unheated water baths or any other suitable laboratory vessels. They will heat, circulate and safely control the temperature of the liquid in the bath within precise limits. Cooling units connect to the mains water supply; the water being circulated through the coil should be at least 5°C cooler than the set of the bath temperature (Fits to any TE or TU unit). It should be noted that all specifications are affected by, but not limited to, the size of the bath, the volume of the item(s) being submersed in the bath and the ambient of the test area. Please contact customer service for assistance.