Immersion Cooler with temperature control for counter-cooling. JULABO immersion coolers are primarily employed for countercooling open bath circulators to ambient temperature or below as well as for rapidly cooling liquids. The models equipped with setpoint control and external Pt100 sensor are capable of maintaining constant temperatures. JULABO immersion coolers have a small footprint and represent an economic solution preventing tap water usage for cooling. Ease of operation make this model series the ideal instruments for a variety of cooling applications.