NTC 10K Waterproof Temperature Sensor B3950 with 50 cm Cable
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Prices updated: 12 Oct 2026
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About this product
A waterproof NTC thermistor probe with a 10 kΩ nominal resistance, ±1% tolerance and a B-value of 3950, mounted on a 50 cm cable. It is rated for -20 °C to 120 °C with a thermal time constant of about 5 seconds. The listing places it in 3D printer categories, where NTC probes of this type are used for heater temperature monitoring.
Specifications
- Nominal resistance (25 °C)
- 10 kΩ ±1%
- B-value
- 3950
- Working temperature range
- -20 °C to 120 °C
- Thermal time constant
- Approx. 5 s
- Cable length
- 50 cm
- AC withstand voltage
- 1800 V for 5 s
Frequently asked questions
How do I read temperature with this NTC sensor?
Build a voltage divider with a fixed 10 kΩ resistor and read the midpoint with an ADC input, such as an Arduino analog pin. Convert the measured resistance to temperature with the Beta equation using B = 3950 and the 10 kΩ value at 25 °C, or with a lookup table.
What does the 1800 V AC withstand rating mean?
It is a dielectric test rating showing the insulation can withstand 1800 V AC for 5 seconds. It is not an operating voltage, so do not use this sensor in high-voltage circuits.
