Analog Thermistor Temperature Sensor Thermal Module NTC 3 PIN 3.3-5V

This analog temperature sensing module is built around an NTC thermistor (Negative Temperature Coefficient). As temperature increases, the resistance of the thermistor decreases, producing a changing analog voltage output that can be read by microcontrollers such as Arduino, ESP32, or Raspberry Pi (via ADC) running at 3.3 V or 5 V logic.

 Key Features

• Sensor Type: NTC thermistor (typically 10KΩ at 25 °C).

• Operating Voltage: 3.3 V – 5 V DC, suitable for most development boards.

• Output: Analog voltage proportional to temperature, readable on analog input pins.

• Interface: Simple 3-pin connection – VCC, GND, OUT.

• Temperature Range: Wide range (typically -55 °C to +125 °C) depending on thermistor characteristics.

• Easy Integration: Plug-and-play module without need for external resistors.

 Overview

This module uses the NTC thermistor in a voltage divider configuration. As the temperature changes, the thermistor’s resistance changes accordingly, resulting in a proportional analog voltage on the OUT pin. You can capture this voltage with a microcontroller’s ADC and convert it into temperature using calibration curves or formulas.

 Typical Uses

• Temperature monitoring in environmental or hardware projects.

• Overheat protection systems – fan or cooling control.

• Climate control and automation – thermostats and smart home systems.

• Educational electronics projects – teaching sensor interfacing and data acquisition.

• Data logging and IoT applications – temperature tracking over time.

Feature:

1.using the NTC thermistor sensor, good sensitivity

2.the comparator output signal is clean, good waveform , driving ability , more than 15mA.

3.adjust the temperature distribution position detection threshold

4.the working voltage 3.3V-5V

5.the output format : digital switching outputs ( 0 and 1 )

6.a fixed bolt holes for easy installation

7.a small PCB board size : 3.2cm x 1.4cm

8.using a wide voltage LM393 comparator

9.Temperature measuring range:-55℃ ~ +126℃

10.Output Signal:Analog

11.Weight:8g

12.Accuracy:±0.5℃

Specification:

1.The thermal resistance of the module is very sensitive to the ambient temperature , typically for detecting the temperature of the surrounding environment ;

2.Through the potentiometer adjustment, you can change the temperature detection threshold ( ie, control temperature ) , such as the need to control the ambient temperature is 50 degrees , the module in the corresponding ambient temperature to its green light , DO high power output when flat , set the temperature below this value, the output is high , the green light does not shine ;

3.DO output can be directly connected to the microcontroller through the microcontroller to detect high and low , thereby detecting temperature changes in the environment.