Focusens Bullet Type NTC Temperature Sensor 10K 3950 for Coffee Machine

The Beta (B) value, 3950K in this case, is a material constant that defines the shape of the thermistor's resistance-temperature curve over its specified range. A higher, well-specified Beta value like 3950K indicates a more predictable and stable relationship between resistance and temperature, which translates to higher measurement accuracy when used with the correct lookup table or Steinhart-Hart equation coefficients in your controller.

The most common method is to create a voltage divider circuit. Connect the NTC sensor in series with a fixed 10kΩ precision resistor between your microcontroller's supply voltage (e.g., 5V or 3.3V) and ground. Connect the junction between the resistor and the NTC to an analog input pin (ADC). The microcontroller reads the varying voltage, which correlates to the sensor's changing resistance, and calculates the temperature using the thermistor's parameters (R25=10kΩ, B=3950K).

Yes, the bullet-type stainless steel probe housing is specifically designed for direct contact with liquids. It provides excellent thermal conductivity and is corrosion-resistant, making it suitable for immersion in water tanks, boilers, or liquid flow paths within coffee machines and other beverage equipment. Ensure all electrical connections are properly insulated and sealed from moisture.

For optimal accuracy, keep lead lengths as short as possible to minimize resistance and noise pickup. For extended runs, use twisted pair or shielded cable, and consider using a 3-wire connection if your measurement circuit supports it to compensate for lead resistance. Generally, for typical 24 AWG wire, runs under 5 meters are acceptable for most non-critical applications.