KY-013 Analog Temperature Sensor Module

Analog Temperature Sensor module KY-013 for Arduino, measures ambient temperature based on resistance of the thermistor.

The KY-013 Analog Temperature Sensor module consist of a NTC thermistor and a 10 kΩ resistor. The resistance of the thermistor varies with surrounding temperature, we'll use the Steinhart–Hart equation to derive precise temperature of the thermistor.

Connect board's power line (middle) and ground (-) to 5V and GND respectively. Connect signal (S) to pin A0 on the Arduino.

Some KY-013 boards are labeled incorrectly,  if you are getting inverted readings (temperature drops when sensor is heated) try swapping signal (S) and ground (-).

The following Arduino Sketch will derive the temperature of the thermistor using the Steinhart-Hart equation implemented in the function Thermister.

#include <math.h>

double Thermister(int RawADC) {
	double Temp;
	Temp = log(((10240000/RawADC) - 10000));
	Temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* Temp );
	Temp = Temp - 273.15; // Convert Kelvin to Celcius
	return Temp;
}

void setup() {
	Serial.begin(9600);
}

void loop() {
	Serial.print(Thermister(analogRead(0))); //read pin A0
	Serial.println("c");
	delay(500);
}

• Fritzing Part: KY-013 Analog temperature sensor module.
• Fritzing Official Site.