Thermistor NTC 12K Ohm Temperature Sensor

🌡️ Thermistor NTC 12K Ohm – Temperature Sensor (Negative Temperature Coefficient)

The NTC 12K Thermistor is a precision temperature-dependent resistor that decreases in resistance as the temperature increases. With a nominal resistance of 12KΩ at 25°C, this thermistor is commonly used for temperature measurement, environmental sensing, and thermal protection in industrial and consumer electronics.

⚙️ Technical Specifications

✅ Features

• 🌡️ Sensitive and accurate temperature measurement

• 🔧 Resistance decreases as temperature rises

• 🧰 Suitable for analog temperature sensing circuits

• ⚡ Low power consumption and fast response time

• 📦 Ideal for Arduino, ESP32, home appliances, HVAC systems, and battery packs

🛠️ Usage with Microcontrollers

• Connect in a voltage divider with a fixed resistor (e.g., 10K or 12K)

• Read analog value on a microcontroller (Arduino A0, ESP32 ADC pin)

• Convert the voltage to temperature using the Steinhart-Hart equation or B-parameter formula

🧪 Example Arduino Code (Same as NTC 10K, but update R1 = 12000)

cpp
CopyEdit
int thermistorPin = A0;
float R1 = 12000.0; // Fixed 12K resistor
float B = 3950;
float T0 = 298.15; // 25°C in Kelvin

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

void loop() {
  int val = analogRead(thermistorPin);
  float R = R1 * (1023.0 / val - 1.0);
  float temperatureK = 1.0 / (1.0/T0 + (1.0/B) * log(R / R1));
  float temperatureC = temperatureK - 273.15;
  Serial.print("Temp: ");
  Serial.print(temperatureC);
  Serial.println(" °C");
  delay(1000);
}

🎥 YouTube Tutorial

📺 How to Use NTC Thermistor with Arduino