Situ temperature display device using high precision assembly of imported chips, high stability, error ≤0.5%, internal power supply, micro-power, stainless steel shell, protective strong, beautiful and delicate; imported high-precision, low temperature drift, ultra-low power integrated circuits and wide temperature type LCD display, built-in high-energy batteries ≥3 years of continuous work without laying power cables, is a high accuracy, good stability, strong applicability of the new site temperature indicator. Measuring range: -50 ~ 600 ℃, sensors: Pt100, Accuracy: 0.5% ± 1 word, the sampling time: 1-5 seconds, and battery: Built-in 3.6V / 2.4Ah lithium battery industry section 1, the continuous use of ≥3 years, the environmental conditions: Temperature: -20 ~ 70 ℃.