XM718/XM718P series heating / cooling dual control PID regulating instrument adopts a number of international advanced technologies, with 100~240VAC wide range input of switch power supply, input adopts digital correction and self-calibration technology, accurate and stable measurement, eliminating temperature drift and time drift caused by measurement errors. The instrument is fully using surface mount technology and adopts multiple protection and isolation design, with strong anti-interference ability and high reliability.