STM32 series 32-bit MCU processor, temperature control meter series universal platform chip, stable operation of more than 500,000 units. 200mS sampling speed, display update speed >2 times/second after AD conversion. The AD in the chip is optimized, and the low temperature drift element is used, and the temperature drift reaches the design requirements in the range of 0-50 degrees to ensure the measurement accuracy within the index range. The power supply adopts strengthened imported chip design and common platform standard components. More than 500,000 meters have been running stably: the integrated LED digital tube mold is adopted to display clearly and brightly. Lightning surge iec61000-4-5 standard: pulse group anti-interference iec61000-4-4 standard. Antistatic ability iec61000-4-2 standard: safety level iec61010-1 standard.