The KY-013 Temperature sensor module is part of the "37 In 1 Sensor Module Board Set Kit for Arduino" series, it is an analogue temperature sensor based on an NTC thermistor and a 10 kΩ resistor. The resistance of the thermistor varies with the surrounding temperature. This module measures temperature from about -55 to +125 ° C with a tolerance of + - 0.5 degrees. The value is calculated using the Steinhart-Hart equation to derive the precise temperature of the thermistor. For its use it must interface with a microcontroller with analogue input.