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2-Pin Thermistor Adapter

2-Pin Thermistor Adapter

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.

$4.99
$4.99
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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

    Material Datasheet 

Pinout

Technical Resources

2-Pin Thermistor Adapter - (AX22-0055)
Circuit Schematic 3D Model

PCB FRONT

PCB BACK

🟢 Live 3D Model

🖱️ Click & drag to rotate

Arduino Example Snippet 

#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);
}