What is an NTC temperature probe? Types and characteristics of temperature sensor probes.
Release Date:
2021-12-14
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NTC temperature probe What is it? Temperature sensors are broadly classified into two types: contact and non-contact. Among these, the probe is a critical component of the temperature sensor, directly influencing the accuracy and stability of temperature measurements. Typically, temperature sensor probes can be divided into the following three main types:
1. Insertion-type probe. NTC temperature probe What is it? This type of probe is primarily used to measure the temperature of both liquids and solids. Its tip is designed as a needle for puncturing. During measurement, if the probe’s temperature is lower than that of the object being measured, heat will transfer from the object to the probe according to the principle of energy conservation. Conversely, if the probe’s temperature exceeds that of the object, heat will flow from the probe into the object. In this case, the object being measured will be heated, and the temperature recorded will reflect the object’s post‑heating temperature. Under these circumstances, the ratio between the probe and the medium must be carefully considered: the better this ratio, the more accurately the energy absorbed by the object can be determined, thereby reducing measurement error. It is important to note that the temperature reading displayed by the instrument does not represent the temperature of the medium itself, but rather the temperature of the sensor. The primary approach to minimizing measurement error is to ensure that the penetration or immersion depth equals the probe’s diameter. 10 to 15 times; when the medium being measured is a liquid, keep it as still as possible.
II. Temperature probe. NTC temperature probe What is it? This type of probe is primarily used to measure air temperature in applications such as cold storage rooms, freezers, air-conditioned spaces, and ventilation areas. Since the probe is exposed to the ambient air, it is susceptible to disturbances caused by airflow. A more effective solution is to position the probe where the airflow is… At 2–3 m/s, gently move the probe downstream to allow the temperature to stabilize and reach equilibrium.
III. Surface Probe. NTC temperature probe What is it? This NTC temperature probe is primarily used to measure the surface temperature of objects. When in use, the probe’s tip must be perpendicular to the object being measured and in close contact with it. It is important to ensure that the contact surface between the probe and the object is smooth; otherwise, measurement errors may easily occur.
When designing temperature sensors, it is essential to select the appropriate probe type and develop products tailored to specific applications, ensuring suitability for a wide range of environments. During operation, the measurement method should be chosen in accordance with the NTC temperature probe type to minimize measurement errors.
NTC temperature probe What is it? The differential scanning calorimeter employs a dual‑temperature probe to ensure high repeatability in sample temperature measurements. A temperature probe is mounted on the furnace wall to monitor the overall furnace temperature. PID control. However, due to the thermal inertia of temperature, there is a certain deviation between the temperature delivered to the sample and the setpoint, and this deviation varies across the seasons. Consequently, using a single temperature probe to both control and measure temperature—whether relying on differential thermal signals or absolute temperature readings—results in relatively large errors. This instrument installs a temperature probe at the bottom of the sample chamber to directly measure the sample’s true temperature, while employing temperature‑control technology to regulate the furnace wall temperature, thereby ensuring that the sample reaches the desired setpoint.
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