Body temperature, as one of the four vital signs of the human body, is an important indicator of our health status. Temperature data is crucial for patients with various diseases, and changes in body temperature can affect clinical diagnosis and treatment. The addition of temperature probe technology has not only improved the technical aspects of human temperature measurement, but also improved patient comfort and accuracy, and created better temperature monitoring tools. Surface temperature measurements can be completed using temperature sensors, including NTC (Negative Thermal Coefficient) thermistors, thermocouples, and digital temperature sensors, to support various accuracy requirements and performance conditions in different applications.
NTC is the abbreviation of Negative Temperature Coefficient. NTC thermistor sensors used as adult temperature probes are common temperature probes used to measure surface temperature. The sensor uses two-wire connections and measures temperature using the resistance qualities of a ceramic/metal composite material. It is widely used in medical clinical fields, including skin probes and rectal probes. Some designs can withstand high-pressure sterilization cycles. Additionally, it can be used for disposable esophageal temperature probes and skin surface temperature measurements. NTC sensors have many advantages in temperature sensing, including small size and long-term stable, high-precision body temperature measurement support.
Infrared temperature sensors can achieve non-contact and accurate temperature measurement in medical applications. The thermocouple sensor is designed to obtain the temperature of an object through the measurement of the infrared energy emitted by the detected object from a distance. The higher the temperature, the more infrared energy is emitted. The thermocouple sensing element is composed of small thermocouples on a silicon chip that absorb energy and produce output signals. This type of temperature sensor is commonly used as an adult temperature probe to measure ear temperature, forehead temperature, or skin temperature. Due to its non-contact temperature measurement, it is widely used in various industries in addition to the medical field.
Although digital sensors are not traditionally used for surface temperature measurement, digital temperature sensors are widely embedded into home health care and personal tracking devices as adult temperature probes. These sensors provide accurate temperature measurements through digital output signals and small circuit board encapsulation. For example, digital temperature sensors can be designed into medical equipment to monitor the air temperature in respiratory equipment, providing greater comfort for patients when air enters the airway.
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