NTC Temperature Sensor Module – Precision Measurement with Analog Output for Arduino and Raspberry Pi

ompact 3-Pin Thermistor Module with LM393 for Room Temperature Monitoring and Incubators

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.