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When buying the temperature and humidity controller, it is necessary to know whether the performance characteristics of temperature and humidity are in line with their own requirements. For those of you who don't know much about the industry, it's hard to tell the difference between the performance of a temperature and humidity controller.

Temperature and humidity controllers have the following characteristics

Temperature coefficient of temperature and humidity controller

Besides being sensitive to environmental humidity, humidity sensors are also sensitive to temperature, and some humidity sensors have different temperature coefficients under different relative humidity. Temperature drift is non-linear. The linearization of temperature drift curve of temperature and humidity controller directly affects the compensation effect. The temperature range of temperature and humidity controller is also an important parameter. Most of the moisture sensor is difficult to work in 40 ℃ above normal.

Accuracy and long-term stability

It is difficult to use it as a measuring device if not at this level. It is difficult for the temperature and humidity controller to achieve the accuracy of 2%~3%RH. In actual use, temperature and humidity display instrument because of the influence of the dust, oil pollution and harmful gas, use a long time, will produce aging, accuracy, precision of the temperature and humidity controller level should combine the long-term stability to judge, in general, long-term stability and service life is the first problem affecting the quality of digital temperature controllers and humidity controllers, drift flow control in 1% RH level products rarely, generally at about 2%, even higher.