BC series are circulators with heating head, the ambient temperature or below temperature -20℃ can be archieved with cooling coils as accessories, the circulators with insulated baths are an economic solution for application of objects directly in the liquid bath or be used for externally applications using the pump connections and external temperature control sensor PT100 as an accessories. The devices are therefore suitable for a number of typical heating and cooling applications such as sample temperature control, materials testing, quality control, analyses, etc..With low level protection and adjustable safety temperature the units fulfil the requirements of Safety Class III/FL according to DIN 12876.