In recent years, the incidence of epidemic diseases has increased, which has increased people's attention to their own health conditions, which has led to an increase in demand for temperature-measuring smart wearable products, such as smart bracelets, TWS Bluetooth earphones, etc. In pursuit of greater convenience and innovation, the compact and chic smart ring has become a popular product chosen by many consumers, and its core function of temperature measurement using NTC thermistor has also become one of the highlights of the product.

Smart ring mainly carries out daily health monitoring through built-in NTC thermistor and a variety of medical monitoring modules, realizing multi-dimensional analysis, allowing users to view data anytime, anywhere. So, how can users use smart rings to know their body temperature? Specifically, NTC thermistor monitors the skin temperature of the user's finger in real time and converts it into an electrical signal, and the ring built-in microprocessor unit (MPU) obtains the corresponding temperature value after algorithm processing, then transmits it to the terminal device (mobile phone, tablet PC, etc.) through the Bluetooth module. As a result, after wearing the smart ring, users can start monitoring through the terminal device APP, obtain measured values such as body temperature, exercise, heart rate, and complete real-time interaction.

Due to the space limitations inside the smart ring, it is necessary to use flexible printed circuit (FPC) for component assembly to maximize space utilization. At the same time, considering the user's insensitive experience, it is necessary to select miniaturized components to achieve a light and comfortable effect. In order to help smart ring manufacturers improve technical solution better and promote the process innovation of smart ring, EXSENSE Electronics Technology Co., Ltd. independently developed and mass-produced a SMD type NTC thermistor for smart wearable, promoting the development of smart ring in the direction of true miniaturization and integration. Compared to traditional SMD type NTC thermistor, this NTC has the following advantages:

First, high accuracy (accuracy can up to ±0.1℃), the accuracy of real-time temperature measurement can be guaranteed when the smart ring is used for temperature monitoring;

Second, the sensitivity is excellent, the smart ring can respond quickly when working, ensuring to obtain temperature information effectively and timely;

Third, the bending strength is great, and its limit bending in the bending test is up to 10mm, which is suitable for the assembly conditions of the flexible printed circuit of the smart ring;

Fourth, the leadless structure of SMD type NTC thermistor for smart wearable is suitable for high-density surface mounting inside smart ring, saving installation space.