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图1所示的廉价百分数相对湿度无线发送器,可用于在1～5℃温度下储藏蔬菜的冷藏库。一般来说,收集高湿低照度低温区的相对湿度数据是很困难的。这种发送器的设计很简单;它使用一种很容易买到的电容式百分数相对湿度传感器,其电容器的电容量随湿度升高而增大。这类传感器的精度一般都在±5％以内。Humirel
The low cost percent relative humidity wireless transmitter shown in FIG. 1 is useful for cold storage of vegetables at temperatures of 1 to 5 ° C. In general, it is very difficult to collect the relative humidity data of high humidity and low illumination temperature. The design of this transmitter is simple; it uses a readily available capacitive percent relative humidity sensor whose capacitance increases with increasing humidity. The accuracy of these sensors are generally within ± 5%. Humirel