KY-013 Analogue Temperature Sensor Module – NTC Thermistor Motion Sensor for Arduino & Environment Monitoring

Product Description The KY-013 is a high-sensitivity analog temperature sensor module based on a 10kΩ Negative Temperature Coefficient (NTC) thermistor. This module operates as a voltage divider circuit, where the resistance of the thermistor decreases as the ambient temperature increases. The resulting change in voltage is output as an analog signal that can be easily read by the ADC (Analog-to-Digital Converter) of an Arduino, ESP32, or Raspberry Pi. It is a cost-effective and reliable solution for indoor environment monitoring, DIY weather stations, and thermal protection circuits in electronic projects. Its compact three-pin design ensures easy integration into any breadboard or custom PCB.

Key Features * NTC Thermistor Technology: High-precision sensing where resistance inversely correlates with temperature changes.

• Simple Analog Interface: Outputs a direct voltage signal, eliminating the need for complex digital protocols.

• Wide Temperature Detection: Capable of measuring a broad range from -55°C up to +125°C.

• Standard Voltage Compatibility: Works seamlessly with both 3.3V and 5V microcontrollers.

• Integrated Resistor: Features an on-board 10kΩ fixed resistor to complete the voltage divider circuit for plug-and-play use.

Technical Details * Working Principle: Uses the Steinhart-Hart equation or a simple Beta-parameter equation to convert analog voltage into Celsius/Fahrenheit in software.

• Resistance Value: Base resistance is 10kΩ at 25°C (77°F).

• ADC Resolution: When paired with a 10-bit Arduino ADC, it provides a fine-grained temperature resolution suitable for most consumer applications.

• Power Consumption: Draws negligible current (typically <0.5mA), making it ideal for low-power battery-operated IoT nodes.

• Signal Pinout: Standard 3-pin configuration: S (Signal/Analog Out), + (VCC), and - (GND).

• Thermal Response Time: Rapid response to ambient air changes due to the small thermal mass of the NTC bead.

• Linearity: While NTC sensors are non-linear by nature, they provide high sensitivity within the standard 0°C to 50°C operating range.

• Electronic Stability: The module includes bypass traces to minimize noise interference on the analog signal line.

• Durability: The NTC bead is epoxy-coated for protection against oxidation and minor moisture exposure.

• Hardware Setup: No external components required; the module provides a ready-to-use voltage signal relative to VCC.

• Logic Levels: The output voltage scales with the input VCC (0V to 3.3V or 0V to 5V).

• PCB Build: High-quality black or blue FR-4 PCB with clear pin silk-screening for error-free wiring.

• Interfacing: Directly compatible with the analogRead() function in the Arduino IDE.

• Application Versatility: Suitable for HVAC monitoring, battery pack thermal sensing, and greenhouse automation.

• Standard Pitch: 2.54mm pin headers allow for easy connection via standard jumper wires.