Temperature and humidity are closely related to people's lives, which has led to the creation of a sensor that integrates temperature and humidity. A temperature and humidity sensor is a device or device that converts the amount of temperature and humidity into an electrical signal that can be easily measured and processed. What problems do you need to pay attention to when buying a temperature and humidity sensor?
1. Consider the measurement scale of temperature and humidity sensors:
Just like we usually use other instruments, we need to confirm the measurement scale before using the temperature and humidity sensor, otherwise it will be very simple to damage the temperature and humidity sensor, if the measurement scale is exceeded, the measurement result will be greatly violated. With the exception of climate and scientific research, temperature and humidity sensors in other areas do not require high requirements.
2. Consider the measurement accuracy of the temperature and humidity sensor:
The measurement accuracy of the temperature and humidity sensor is the most important effective index to judge the sensor level. Different operation scenarios require different measurement accuracy of temperature and humidity sensors, and the required measurement accuracy is different for each temperature and humidity of the same object. At the same time, the cost determines the price, and in order to create a temperature and humidity sensor with different measurement accuracy, the cost difference is very large. Therefore, in order to make better use of temperature and humidity sensors, or in order to save unnecessary expenses, it is necessary to find the measurement accuracy required by your own practice when purchasing, and it is not better to seek high-precision temperature and humidity sensors than to avoid unnecessary troubles when measuring.
3. Consider the time drift and temperature drift when applying temperature and humidity sensors in practice:
When we use the temperature and humidity sensor for a period of time, due to the influence of some dust, oil and some harmful gases, the electronic temperature and humidity sensor will age, which will lead to a decrease in its accuracy. The annual drift of electronic humidity transmitters is generally around ±2%, or even higher. Under normal circumstances, the manufacturer will indicate that the effective use time of the first calibration is 1 or 2 years, and the calibration needs to be started at the end of the period.
Of course, in addition to the above points when choosing a temperature and humidity sensor, it is also worth noting that it is best not to use it in acidic, alkaline or organic solvent environments. In addition, in order to accurately measure the humidity of the space, do not place the temperature and humidity sensor near the wall and in a place where the air is not smooth. If you want to measure the temperature and humidity of a relatively large space, it is best to use multiple temperature and humidity sensors to measure at the same time, which can improve the quality of the measurement data.
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