Product Overview
A thermistor is a thermal resistor whose resistance changes significantly with temperature, making it ideal for temperature measurement applications. Unlike standard resistors, thermistors are designed for drastic resistance changes per degree Celsius, offering a cost-effective and robust solution for temperature sensing. They are particularly well-suited for basic temperature feedback control systems, such as activating fans based on temperature thresholds. Compared to other temperature sensors like analog output chips (LM35/TMP36), digital sensors (DS18B20), or thermocouples, thermistors are significantly cheaper, easier to waterproof, and can operate at any voltage. While they require a bit more effort to interpret readings and have limitations at very high temperatures, their simplicity, reliability, and affordability make them a popular choice for many projects.
Product Attributes
- Brand: Adafruit Industries
- Origin: Created by Lady Ada
- Type: NTC (Negative Temperature Coefficient)
Technical Specifications
| Specification | Value |
|---|---|
| Resistance at 25C | 10K ±1% |
| B25/50 Coefficient | 3950 ±1% |
| Thermal Time Constant | ~15 seconds |
| Thermistor Temperature Range | -55C to 125C |
| Wire Temperature Range | -55C to 105C |
| Wire Gauge | 28 AWG PVC |
| Wire Diameter | 3.5mm / 0.13in |
| Wire Length | 18in / 45cm |
| Accuracy (typical) | ±0.25C (with 1% thermistor and accurate ADC) |
| Self-Heating Dissipation (typical) | ~0.625 mW |
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