| Feature | Details |
| Sensor Type | NTC Thermistor (Negative Temperature Coefficient) |
| Operating Voltage | 3.3V to 5V DC |
| Output Type | Analog Voltage |
| Measuring Range | -55°C to +125°C |
| Accuracy | ±0.5°C (Approx) |
| Interface | 3-Pin (S, VCC, GND) |
Product Description The KY-013 Analog Temperature Sensor Module is a simple yet effective tool for measuring ambient temperature. It is based on a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases as the temperature increases. This module includes an onboard 10kΩ voltage divider resistor that converts the changing resistance into a varying analog voltage. It is a popular choice for building digital thermometers, weather stations, and thermal safety cut-off switches. Its small size and 3-pin interface make it incredibly easy to use with any microcontroller that has an Analog-to-Digital Converter (ADC).
Key Highlights
Linear-Like Analog Output: When used with a voltage divider circuit (included on the module), it provides a smooth voltage change that microcontrollers can easily interpret.
Wide Temperature Range: Capable of sensing a broad spectrum of temperatures, from freezing cold to boiling heat, making it versatile for both indoor and outdoor projects.
Low Power Consumption: Operates with minimal current, making it suitable for battery-powered remote sensor nodes.
High Sensitivity: Reacts quickly to temperature changes in the air or when placed against a surface, allowing for real-time monitoring.
Standard 3-Pin Layout: Uses the common "S, VCC, GND" pinout found in most hobbyist sensor kits, ensuring compatibility with standard jumper wires.
Technical Specifications
Thermistor Resistance: 10kΩ at 25°C
B-Value: 3950K (Typical)
Dissipation Factor: 2mW/°C
Dimensions: 18.5mm x 14.5mm
Pin Spacing: 2.54mm
Installation Tip from Robogears To get an actual temperature reading in Celsius from this sensor, you cannot just use a simple map() function because the thermistor's response is non-linear. You must use the Steinhart-Hart Equation or a lookup table in your Arduino code to convert the analog voltage into degrees. Connect the "S" pin to an analog input (like A0). If you notice the readings are jittery, add a small 0.1μF capacitor between the "S" and "GND" pins to filter out high-frequency electrical noise.
Note: This module provides an analog voltage based on resistance. Software calibration is required for accurate temperature display. Product images are for illustration purposes only.