The main type of temperature sensor probe depends on the measurement environment and media，It can be divided into the following types：

1. Pierce/Immersion probe

• peculiarity：It is mainly used to measure the temperature of liquids and solids，The front end of the probe is needle-like or rod-like。The principle of this probe is based on the conservation of energy，When there is a temperature difference between the temperature of the measuring probe and the measured medium，Heat is transferred between the two。

• Application scenario：It is widely used in situations where the internal temperature of liquids or solids needs to be accurately measured，Such as chemical solution temperature measurement during chemical reaction、The surface temperature measurement of bearings and gears in the machinery manufacturing industry。

• A way to reduce errors：Make sure the penetration or immersion depth is the diameter of the probe10to15times；When measuring liquids，Keep the liquid as still as possible。

2. Air temperature probe

• peculiarity：Used to measure air temperature，Commonly found in cold storage、freezer、Air conditioning room、Ventilated space。Because the sensor is exposed，Therefore, the measured value is easily affected by airflow disturbance。

• Application scenario：Suitable for all kinds of occasions that need to monitor air temperature，Such as environmental monitoring、Air conditioning control system, etc。

• A way to reduce errors：When the air flow is weak（Such as2-3m/s），Gently move the probe along the current，So that the temperature reaches equilibrium and stability。

3. Surface probe

• peculiarity：Used to measure the surface temperature of an object。In use，The front end of the probe must be perpendicular to the object being measured，And make full contact with the object to be measured。

• Application scenario：It is widely used to monitor the surface temperature of objects，For example, temperature monitoring in food processing、Electronic equipment heat dissipation performance test。

• Matters needing attention：The contact surface between the probe and the object to be measured must be flat，Otherwise, the accuracy of the measurement results will be affected。

In addition to the three main types of probes mentioned above，Temperature sensor probes also include a variety of other types，Such as thermocouple probe、Thermal resistance probe、Thermistor probes and integrated temperature sensor probes, etc。Each of these probes has its own unique measurement principles and application scenarios，For example, the thermocouple probe uses the principle that two conductors of different materials generate electromotive force at the contact due to temperature differences to measure temperature，Has a wide measuring range、Good stability, etc；Thermal resistance probes measure temperature based on the characteristics of metal resistance with temperature，Suitable for accurate measurement in low and medium temperature areas；High sensitivity of thermistor probe、Small size、Quick response，Suitable for rapid temperature measurement and control systems；The integrated temperature sensor probe then integrates the temperature sensing element、The signal processing circuit and the necessary auxiliary circuit are integrated on the same chip，The digital output of temperature signal is realized，Simplified peripheral circuits，The anti-interference ability of the system is improved。

To sum up，There are various types of temperature sensor probes，The selection should be determined according to the specific measurement needs and environmental conditions。