Introduction - If you have any usage issues, please Google them yourself
Solar energy water heater intelligent control, it with 89 c52 as the core, with resistance type 4 gears water level sensor, NTC (negative temperature coefficient thermistor temperature sensor, 8255 extended keyboard and a display device, driver circuit, electromagnetic valve, electric heating, alarm) and other peripheral devices, complete the solar water heater tank water level, water temperature measurement, display, etc