it is a portable model with housed in a briefcase, suitable for lab as well as field use. it is a six channel instrument with 4 digits display temperature range is from 0°c to 50°c with a resolution of 0.1°c and an accuracy of ± 0.1°c± 1 digit. the unit can be operated on battery as well 220 volts ac. mains supplied without probes size of probe is 10 cm 30 cm 50 cm 100 cm.