The Model 9101 features solid-state cooling technology to eliminate the possibility of a sealed water cell freezing and bursting during transport. It is run by an adjustable electronic controller which can be recalibrated to fit your needs. The Dry-Well provides bath-quality stability in a portable ice-point reference. The unit has three test wells for inserting more than one probe at a time, and each well is stable to ±0.005°C.