PolyScience offers a line of low-temperature circulators that provide precise temperature control for cloud and pour-point testing, low-temperature reactions, sample tempering, viscosity studies, and general laboratory cooling applications. Designed with a 13-liter reservoir, the 9700 series refrigeration/heating circulators feature a –45°C to 200°C temperature range and are available with a choice of three different controllers. Other standard features include an integrated simplex or duplex pump, a rapid-response heater, and an energy-saving Cool Command™ refrigeration system.

(800) 229-7569; www.polyscience.com