Programmable 159L dry heat sterilizer with improved temperature controller and enhanced safety features and independent overheat prevention device. Digital setting by main menu and UP/DOWN keys for fixed temperature, program, quick auto stop, auto stop and auto start operations. Standard equipped with calibration off-set, lock function, power failure recovery mode. Programmable with maximum 30 steps, 6 patterns, repeat operation. Operating temp. range ambient +5~260 C