Immersion circulation thermostat for setting the temperature of a bath or external apparatus with non-flammable liquids at temperatures up to 95°C. The fully electronic continuous regulator and the powerful circulating pump ensure that the water in the bath is optimally stirred so that the temperature remains highly constant. The user-friendly menu and simple three-button operation guarantee that the equipment is easy to use. A single-row LED display indicates the desired temperature and the actual temperature. Excess temperature protection is set to a fixed value of 95°C and features both audible and visual alarms to enhance operating safety. Also included is the possibility of connecting a water cooler or heat exchanger to provide cooling by means of tap water.