The 3-Pin NTC Thermistor Temperature Sensor Module is a simple and budget-friendly temperature sensing board that works using an NTC thermistor (Negative Temperature Coefficient). As the temperature increases, the thermistor resistance decreases, and the module provides an output that can be read by a microcontroller. It is commonly used for basic temperature monitoring, fan control, and over-temperature alert projects with Arduino and ESP boards.
Core Sensor Specifications
• Sensor Type: NTC Thermistor (Temperature dependent resistor)
• Measurement Type: Temperature sensing (analog based)
• Working Principle: Resistance decreases as temperature increases
• Output Support: Analog output (some variants also provide digital trigger)
Electrical & Interface
• Operating Voltage: 3.3 V – 5 V DC
• Output Type: Analog voltage (AO)
• Digital Output: DO (only on comparator variants)
• Interface Pins: VCC, GND, AO / DO
• Threshold Adjustment: Onboard potentiometer (DO variants)
Performance Characteristics
• Fast response for temperature changes
• Stable output with proper filtering
• Best suited for relative temperature sensing
• Accuracy depends on calibration and ambient conditions
Physical Characteristics
• Module Type: PCB-mounted temperature sensor board
• Sensor Element: NTC thermistor bead
• Indicators: Power LED + Output LED (variant dependent)
• Compact and lightweight design
Compatibility
• Arduino Uno / Nano / Mega
• ESP8266 / ESP32 (ADC range consideration required)
• Raspberry Pi (with external ADC module)
• STM32 and other MCU boards
Key Advantages
• Low cost temperature sensing solution
• Simple wiring and easy integration
• Adjustable trigger output on DO variants
• Ideal for beginners and quick prototypes
Technical Insights
• AO output needs calibration to display °C accurately
• DO output gives ON/OFF based on set threshold
• Analog reading can vary with noise and supply voltage
• Best results with averaging and filtering in code
Applications
• DIY temperature monitoring systems
• Fan control and thermal automation
• Overheat protection alerts
• Battery and electronics temperature sensing
• Educational experiments and learning kits
Pro Tip
• Use 10–20 sample averaging for stable readings
• Keep sensor away from direct airflow for accurate ambient reading
• For ESP32, use voltage divider or proper ADC scaling if needed
• Calibrate once for more accurate °C conversion
Package Includes
• 1 × 3-Pin NTC Thermistor Temperature Sensor Module