Thermal sensor module; relay module combo; temperature sensor module; thermistor module

Color: Blue Material: PCB Main chip: LM393 Working voltage: DC 5V With output status indicator light, lower level, light on; High level, light off Output open start is higher than the set temperature, then closed is lower than the set temperature The comparator output directly drive the relay, can be connected to AC 220V or other devices Distribution thermal sensor bit to adjust temperature Sensor interface pin and plus leads can be installed With 4 x 3mm fixed bolt hole for easy installation Monitors tank temperature, indoor temperature, auto temperature, etc.