Preston Industries Inc., introduces an economical, easy-to-use immersion circulator designed for applications requiring frequent use of specific temperature set points. Ideal for coliform testing and similar applications, the Model 7306 Immersion Circulator features an ambient +5 to +150-degree Celsius range, as well as three user-defined temperature presets for rapid use. Fluid temperature is displayed in either Celsius or Fahrenheit on a bright LED readout.