HaiWang MF58 4.7K 3435 1% NTC Thermistor Temperature Sensor

This HaiWang MF58 thermistor has a nominal resistance of 4.7 kilo-ohms (kΩ) at the standard reference temperature of 25°C. Its material constant, known as the B-value (B25/85), is 3435 Kelvin (K). This specific combination defines its precise resistance-temperature curve for accurate sensing.

The thermistor is typically used in a voltage divider circuit with a fixed-value resistor (e.g., a 4.7kΩ resistor). Connect one thermistor lead to your microcontroller's analog input pin and the other to ground, with the fixed resistor between the pin and the supply voltage (3.3V or 5V). The analog reading can then be converted to temperature using the Steinhart-Hart equation or a pre-calculated lookup table based on its 3435 B-value.

The glass encapsulation provides a hermetic seal that protects the sensitive NTC ceramic element from moisture, humidity, and corrosive atmospheres. This significantly enhances long-term stability and reliability, allowing the sensor to operate in harsh industrial environments where plastic-coated thermistors might degrade. It also offers good thermal conductivity for a fast response.

While the glass encapsulation improves durability, the operational limits depend on the specific MF58 variant. Standard MF58 thermistors are commonly rated for continuous operation up to approximately 150°C to 200°C. For high-temperature applications beyond this range, you must verify the exact specifications for this 4.7K 3435 model or consult the manufacturer's datasheet for derating guidelines.

The 1% tolerance indicates that the actual resistance of the thermistor at 25°C will be within ±1% of its stated 4.7kΩ value. This tight tolerance ensures high interchangeability between units, meaning you can replace a sensor without needing to recalibrate your system, which is critical for consistent performance in volume production and precision measurement applications.