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2-Pin Thermistor Adapter

2-Pin Thermistor Adapter

SKU:AX22-0055

A clean analog front-end for any 2-wire NTC thermistor. Screw your thermistor into the onboard terminal block, and the module handles the rest using a 10K reference resistor, voltage divider, and power filtering. Reads out as an ADC voltage proportional to temperature, ready for Steinhart-Hart or simple lookup conversion in firmware. Ideal for enclosure monitoring, fluid temperature sensing, or any project where you need a simple, noise-free temperature reading.
$6.99
$6.99
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Technical details

  • 22 mm × 22 mm square
  • 10k Ohm on board resistor
  • Power filtering
  • 4× ⌀2.7 mm Mounting Holes
  • 1.8 V, 3.3 V, 5.0 V
  • Arduino IDE Compatible
  • MicroPython Compatible
  • MicroBlocks Compatible

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Pinout & connections

Pinout & connections

Technical Resources

2-Pin Thermistor Adapter - (AX22-0055)
Circuit Schematic 3D Model
PCB FRONT
2-Pin Thermistor Adapter — PCB FRONT
PCB BACK
2-Pin Thermistor Adapter — PCB BACK

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Arduino example

ax22-0055.ino 
#define THERM_PIN 4 //adjust as needed

#define SERIES_R  10000.0
#define NOMINAL_R 10000.0
#define NOMINAL_T 25.0
#define B_COEFF   3950.0

void setup() {
  Serial.begin(115200);
}

void loop() {
  int raw = analogRead(THERM_PIN);
  float voltage = raw / 4095.0;
  float resistance = SERIES_R * (voltage / (1.0 - voltage));

  float tempK = 1.0 / ((1.0 / (NOMINAL_T + 273.15)) +
                (1.0 / B_COEFF) * log(resistance / NOMINAL_R));
  float tempC = tempK - 273.15;

  Serial.printf("Temp: %.1f C\n", tempC);
  delay(1000);
}