NTC 10K Thermistor Temperature Sensor

Description

NTC 10K Thermistor Temperature Sensor

This NTC thermistor probe measures temperature through changes in resistance. NTC means Negative Temperature Coefficient: resistance decreases as temperature rises.

Specifications

• Resistance at 25 °C: 10 kΩ ±1%
• Material constant (B value): 3950 ±1%
• Operating temperature range: −50 °C to +300 °C (as stated in the source listing; confirm the probe’s actual rating)
• Thermal response time: ≤20 seconds in air
• Dissipation factor: approximately 7.5 mW/K in air
• Stability: high stability and durability (as stated in the listing)

Specification note: the source title and resistance specification say 10 kΩ, while the source description mentions “10K/100K” and its keywords include “NTC 100K.” This translation retains 10 kΩ from the listed specification; please verify the product value.

How it works

As the thermistor warms, its resistance falls. A voltage-divider circuit converts that resistance change into a voltage that a microcontroller or measurement system can read.

Applications

• Household appliances, such as refrigerators, freezers, cookers and fryers
• Industrial and telecommunications systems: process control, heating and ventilation, fire alarms and battery thermal management
• Automotive temperature monitoring and electronic systems

Using it with Arduino Uno

Basic Arduino example

const int sensorPin = A0; // Broche où le NTC est connecté
float temperature;

void setup() {
Serial.begin(9600);
}

void loop() {
int sensorValue = analogRead(sensorPin);

// Calcul de la résistance avec résistance de référence 10kΩ
float resistance = (1023.0 / sensorValue - 1.0) * 10000.0; // Changé de 100000.0 à 10000.0

// Conversion en température avec les bonnes valeurs pour NTC 10K
// Note: 3950.0 est le coefficient B de la thermistance - à ajuster selon votre modèle
temperature = 1.0 / (log(resistance / 10000.0) / 3950.0 + 1.0 / 298.15) - 273.15;

Serial.print("Temperature: ");
Serial.print(temperature);
Serial.println(" C");
delay(1000);
}

How the example works

1. Reads the thermistor voltage on analog input A0 and starts serial communication at 9600 baud.
2. Calculates resistance using the 10 kΩ divider shown in the source code, then applies the Steinhart–Hart equation to estimate temperature in Celsius.
3. Prints the calculated temperature and waits one second before the next reading.

Notes from the source example

• Verify the thermistor’s B value; the example uses 3950.
• 298.15 is the reference temperature in kelvin (25 °C).
• The calculation assumes a voltage divider using a 10 kΩ fixed resistor.

Recommended wiring diagram

Arduino A0 ----+
|
NTC 10K
|
GND
|
10kΩ
|
VCC (5V)

The divider allows the Arduino to measure the thermistor’s resistance change as temperature varies.

Keywords: NTC 10K thermistor, temperature probe, Arduino temperature sensor, NTC sensor.