Precautions for the use of hygrometers in use

Lead: Thermohygrometer is mainly used to determine the temperature and humidity in the environment to determine the corresponding environmental conditions, so it is widely used in everyone's daily life. In choosing temperature and humidity timing, we should pay attention to the following aspects:

First of all, the hygrometer is generally divided into two types: the analog thermometer and hygrometer and the digital thermometer and hygrometer. The former is relatively inexpensive, while the latter is highly accurate, and the digital display method can more intuitively view the indoor temperature and humidity, so the use of digital hygrometers is relatively high.

Selecting the measuring range As with the measuring weight and temperature, the selection of the humidity sensor must first determine the measuring range. In addition to the meteorological and scientific research departments, the measurement of temperature and humidity generally does not require a full-scale wet process (0-100% RH) measurement. In addition, the humidity sensors with different measurement accuracy have great differences in manufacturing cost. Therefore, the selection must be made depending on the use conditions.

In actual use, due to the effects of dust, harmful gases, etc. in the environment, the long-term use of electronic humidity transmitters will deteriorate due to aging, and the annual drift of electronic humidity transmitters will generally be within ±2%. Or higher. Therefore, in general, the manufacturer will mark the effective use time of one calibration as 1 year or 2 years. After the expiration, it is necessary to recalibrate.

Finally, the hygrometer also has certain requirements for placing the environment. Since acidic, alkaline, and organic solvent-containing atmospheres can affect the stability of the humidity sensor, a large amount of dust can also cause deviations in its accuracy, so care should be taken to place the temperature and humidity meter in a relatively ventilated place.

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