The principle and characteristics of temperature and humidity sensor
June 14,2022
Temperature and humidity sensor for incubator,Cheap humidity and temperature sensor,Wholesale temperature and humidity sensor
The temperature and humidity sensor is one of the sensors. It passes the temperature and humidity in the air through a certain detection device. After measuring the temperature and humidity, it is converted into electrical signals or other required forms of information output according to certain rules to meet user needs.
Since temperature and humidity are closely related both in terms of physical quantities and in actual people's lives, sensors that integrate temperature and humidity will be produced accordingly. A temperature and humidity sensor refers to a device or device that can convert temperature and humidity into electrical signals that can be easily measured and processed. The temperature and humidity sensors on the market generally measure temperature and relative humidity.
The principle and structure of temperature and humidity sensor for incubator vary widely. How to select a temperature and humidity sensor reasonably according to the specific measurement purpose, measurement object and measurement environment is the first problem to be solved when measuring a certain quantity. When the temperature and humidity sensor is determined, the corresponding measurement method and measurement equipment can also be determined. The success or failure of the measurement results depends to a large extent on whether the selection of temperature and humidity sensors is reasonable.
1. Frequency response characteristics of temperature and humidity sensor for incubator:
The frequency response characteristics of the temperature and humidity sensor for incubator determine the frequency range to be measured, and the measurement conditions must be maintained within the allowable frequency range without distortion. In fact, the response of the sensor always has a certain delay, and it is hoped that the shorter the delay time, the better.
The frequency response of the sensor is high, the frequency range of the measurable signal is wide, and due to the influence of the structural characteristics, the inertia of the mechanical system is large, and the frequency of the measurable signal of the sensor with low frequency is low. In dynamic measurement, the response characteristics should be based on the characteristics of the signal (steady-state, transient, random, etc.) to avoid errors.
2. Wholesale temperature and humidity sensor linear range:
The linear range of the Wholesale temperature and humidity sensor is the range where the output is proportional to the input. Theoretically, within this range, the sensitivity remains constant. The wider the linear range of the sensor, the larger its range, and can guarantee a certain measurement accuracy. When selecting a sensor, when the type of the sensor is determined, it first depends on whether its range meets the requirements.
3. Determine the type of sensor according to the measurement object and measurement environment:
To carry out a specific measurement work, the temperature and humidity sensor of which principle should be considered first, which needs to be determined after analyzing various factors.
Because, even for measuring the same physical quantity, there are multiple principles of Cheap humidity and temperature sensors to choose from. Which sensor is more suitable, you need to consider the following specific issues according to the characteristics of the measured and the conditions of use of the sensor: The size of the measuring range; the requirements of the measured position on the sensor volume; the measurement method is contact or non-contact; the signal extraction method, wired or non-contact measurement; the source of the sensor, domestic or imported, whether the price can be afforded, or self-developed .
4. Selection of sensitivity of Cheap humidity and temperature sensor:
Generally, within the linear range of the temperature and humidity sensor, it is desirable that the sensitivity of the sensor be as high as possible. Because only when the sensitivity is high, the value of the output signal corresponding to the measured change is relatively large, which is beneficial to signal processing.
However, it should be noted that the sensitivity of the sensor is high, and the external noise unrelated to the measurement is also easily mixed, and it will also be amplified by the amplification system, affecting the measurement accuracy. Therefore, it is required that the sensor itself should have a high signal-to-noise ratio to minimize the disturbance signal introduced from the outside world.
5. Stability:
After a temperature and humidity sensor has been used for a period of time, the ability of its performance to remain unchanged is called stability. In addition to the structure of the sensor itself, the factors affecting the long-term stability of the sensor are mainly the use environment of the sensor.
Before selecting a sensor, the use environment should be investigated, and the appropriate sensor should be selected according to the specific use environment, or appropriate measures should be taken to reduce the impact of the environment. The stability of the sensor has quantitative indicators. After the period of use, it should be re-calibrated before use to determine whether the performance of the sensor has changed.
Temperature and humidity sensor for incubator, Cheap humidity and temperature sensor, Wholesale temperature and humidity sensor, if you want to know more, you can contact us.