Inkbird Heating Cooling Stage Thermostat Temperature Controls, NTC Sensor for Home brewing Fermenation, Carboy, Freezer, kegerator (ITC308S + Long&Short Sensor) The probe is replaceable (NTC TYPE from Inkbird). The unit is perfect for home brewing, heating mat, chiller ect. It has a calibration adjustment setting in case you need it. It is accurate, easy to use, feature and reliable. Dual Display shows both measured and set temperature.