What is the difference between temperature and humidity sensor, built-in probe and external probe?

With the continuous development of society, the application of temperature and humidity sensors is very common. People's life is closely related to temperature and humidity, and various fields are inseparable from the requirements of environmental factors such as temperature and humidity. Our common temperature and humidity sensors have built-in and external probes. Is there any difference in their functions and applications?



Built-in probe

The built-in probe cannot see the sensor from the outside, so the appearance is naturally more generous and beautiful. The built-in probe has extremely low power consumption, and can also reduce the influence of external factors such as aging, vibration, and volatile chemical gases on the sensor to ensure its good stability. One-piece installation, suitable for measuring the entire ambient temperature. Such as data centers, smart buildings, warehouses, clean rooms, laboratories and other occasions.

External probe

External probe refers to the temperature and humidity sensor outside the instrument body. The advantage of the external probe is that the measurement range will be wider than that of the built-in sensor, because the sensor is not together with the display and the circuit part. It is suitable for measuring relatively small spaces, such as drying boxes, constant temperature and humidity boxes, refrigerators, etc. The separate external probe can measure confined spaces and pipes: such as the inside of the main control box, grain piles, etc., the probe can be inserted for monitoring, and the metal probe is also waterproof and anti-condensation.



External probes are also divided into hardcover probes, waterproof probes, metal waterproof probes, quarter pipe thread probes, high temperature probes and so on. The hardcover probe is suitable for most occasions, the probe is sensitive, waterproof and dustproof; the waterproof probe is suitable for high dust occasions, and the waterproof sensitivity of the probe is not as good as that of the hardcover probe; the metal waterproof temperature probe is suitable for occasions with high dust and high sensitivity; four Branch thread probe, suitable for measuring temperature and humidity in containers with the same installation thread; high temperature probe; suitable for measuring temperature higher than 80 ℃.

As a composite technology of electronic technology and physical and chemical principles, the temperature and humidity sensor only accounts for 50% of the hardware factor, and another important factor is calibration. If the measured value is guaranteed to be accurate, it is necessary to ensure that the calibration value of each detection is always within a fixed range, which is very difficult to achieve. High precision and stable performance have always been the hard indicators of temperature and humidity sensors.

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