Temperature Range : 5 C Above Ambient to 150 C. Temperature Accuracy : +- 0.5 C or Better. With Microprocessor based Digital Temperature Indicator Cum Controller. With Timer Facility Available. With 38 mm Dia. Size : - 6 Tube. 9 Tube. 12 Tube. 15 Tube. 18 Tube. 24 Tube. optional : - (1) Glass Patrs.