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可同时对温度、湿度信号进行测量控制，  并实现液晶数字显示，还可通过按键对温、湿度分别进行上、下限设置和显示，从而使仪表可以根据现场情况，自动启动风扇或加热器，对被测环境的实际温、湿度自动调节。动作指示通过两常开触点输出，真正使仪表实现了智能化更能适应复杂多变的现场情况，从而达到有效的保护设备的目的。本仪表适用于高低开关柜、端子箱、箱式变电站等多种柜型。温湿度报警器主要由传感器、控制器、加热器（或风扇等）三部分组成。传感器检测箱内温湿度信息，并传递到控制器由控制器分析处理：当箱内的温度、湿度达到或超过预先设定的值时，控制器中的继电器触点闭合，加热器（或风扇）接通电源开始工作，对箱内进行加热或鼓风等；一段时间后，箱内温度或湿度远离设定值，控制器中的继电器触点断开，加热或鼓风停止。
It can measure and control the temperature and humidity signals at the same time, and realize the LCD digital display. It can also set and display the upper and lower limits of temperature and humidity by keys, so that the instrument can start the fan or heater automatically according to the field situation, and automatically adjust the actual temperature and humidity of the environment under test. Through the output of two normal open contacts, the action indication makes the instrument more intelligent and adaptable to the complex and changeable field conditions, thus achieving the purpose of effective protection of equipment. This instrument is suitable for high and low switch cabinet, terminal box, box type substation and so on. The temperature and humidity alarm mainly consists of three parts: sensors, controllers, heaters (or fans, etc.). The sensor detects the temperature and humidity information in the box and transmits it to the controller for analysis and processing. When the temperature and humidity in the box reach or exceed the preset value, the relay contacts in the controller close, the heater (or fan) is connected to the power supply to start work, and the box is heated or blown. When the temperature or humidity in the box is far away from the set value, the relay contacts in the controller are disconnected and the heating or blast stops.