Bridge thermostats are suitable for controlling the temperature of any bath. External systems can also be controlled using rotational speed controlled pressure-suction pumps with VPC technology. Models with a larger heat output are suitable for larger bath volumes. The telescopic arm can be pulled out to a length of a maximum of 884 millimeters. Heating bath circulation thermostats with a stainless steel bath allow the temperature control of internal and external thermoregulation tasks. Items can be directly thermo-regulated by placing them in a thermostat bath and the control of externally connected applications is also possible. The units are suitable for a number of typical temperature control tasks such as sample temperature control, materials testing, quality control, etc. The devices are fitted with over temperature and low level protection in line with Safety Class III/FL according to DIN 12876. A powerful pressure/suction pump ensures optimal circulation and temperature homogeneity in the thermostat bath and also allows temperature control of externally connected applications using a pump adapter.