NTC 10K 3950 Waterproof Thermistor Probe Sensor 50/100CM
NTC 10K 3950 Waterproof Thermistor Probe Sensor 50/100CM
NTC 10K 3950 Waterproof Thermistor Temperature Probe — 50cm / 100cm
Keep your appliances running at exactly the right temperature with this precision NTC 10K B3950 thermistor temperature sensor probe. Designed for water heaters, coffee machines, water dispensers, and a wide range of DIY electronics or home-automation projects, this waterproof probe delivers fast, accurate readings across an impressive temperature range.
Key Features
- High Accuracy: 10K ±1% resistance at 25 °C with a B-value of B3950 ±1% — tight tolerances for reliable, repeatable measurements.
- Wide Temperature Range: Rated from -40 °C to +125 °C (-40 °F to +257 °F), covering everything from freezing cold to high-heat appliance environments.
- Waterproof Probe: Fully sealed tip protects the sensing element from moisture, steam, and liquid immersion — ideal for water-based applications.
- Flexible Wire Options: Available in 50 cm or 100 cm cable lengths to suit different installation requirements. Wire: 26AWG (2651), rated to 105 °C.
- Plug-and-Play Connector: Pre-fitted with an XH2.54-2Y connector for quick, hassle-free connection to control boards, microcontrollers (Arduino, Raspberry Pi), and OEM PCBs.
- Broad Compatibility: Perfect for water heaters, coffee makers, water dispensers, 3D printer heated beds, aquarium controllers, HVAC systems, and more.
- Brand New Quality: 100% new components; each unit tested before shipment.
Technical Specifications
| Sensor Type | NTC Thermistor |
| Resistance | 10K ±1% (at 25 °C) |
| B-Value | B3950 ±1% |
| Temperature Range | -40 °C to +125 °C |
| Wire Spec | 2651 26AWG, rated 105 °C |
| Connector | XH2.54-2Y |
| Cable Length | ~50 cm or ~100 cm (±5 mm) |
| Package Includes | 1 × Thermistor Probe |
| Country of Origin | Made in China |
Common Applications
- Water heaters & boilers
- Coffee machines & espresso makers
- Water dispensers & coolers
- 3D printer heated beds & hot ends
- Aquarium & fish tank temperature control
- Arduino / Raspberry Pi DIY temperature projects
- HVAC & refrigeration systems
- Industrial equipment monitoring
For a deeper understanding of how NTC thermistors work in electronic measurement and control systems, visit the NIST Temperature Calibration Resources.
Note: Due to manual measurement, cable length may vary by ±5 mm. Slight color differences between product images and the actual item may occur due to monitor settings.
Frequently Asked Questions
Q: What devices is this NTC 10K thermistor probe compatible with?
A: This NTC 10K 3950 waterproof thermistor probe is compatible with a wide range of appliances and electronics, including water heaters, coffee machines, water dispensers, 3D printers, aquarium controllers, Arduino and Raspberry Pi projects, and HVAC systems. Any device or control board that uses a standard 10K NTC thermistor with an XH2.54-2Y connector will work seamlessly.
Q: Is this thermistor probe truly waterproof?
A: Yes. The probe tip is fully sealed to protect the sensing element from moisture, steam, and direct liquid immersion, making it suitable for use in water heaters, dispensers, and other wet environments.
Q: What is the difference between the 50 cm and 100 cm versions?
A: The only difference is the cable length — 50 cm (~19.7 in) or 100 cm (~39.4 in). Choose the longer cable if the sensor needs to reach further from the control board or PCB. Both versions share identical electrical specifications.
Q: Can I use this thermistor with an Arduino or microcontroller?
A: Absolutely. The 10K NTC B3950 thermistor is one of the most commonly used sensors in DIY electronics. Pair it with a voltage divider and the Steinhart–Hart equation (or a pre-built Arduino library) to convert resistance readings into accurate temperature values.