Digital temperature and humidity controller - working principle features & types

Digital temperature and humidity controller – working principle features & types

The digital temperature and humidity controller is an instrument device widely used inside the switchgear. Its main functions are temperature control, dehumidification, anti-condensation, etc. It is mainly used in various high and low voltage switchgears, terminal boxes, box-type substations, isolating switches, circuit breaker mechanism boxes and other fields that need to control temperature and humidity.

Working principle of Digital temperature and humidity controller

The sensor, controller, and heater (or fan, etc.) are the three basic components of the temperature and humidity controller. Its working principle is as follows:

When the temperature and humidity in the box reach or exceed the preset value, the controller’s relay contact closes, turning on the heater (or fan) and beginning to heat or blow the inside of the box, among other things. The sensor detects the temperature and humidity information in the box and transmits it to the controller for analysis and processing. When the humidity or temperature inside the box reaches a certain point over time, the relay contact in the temperature and humidity controller is cut off, and the heating or blowing ceases. Auxiliary capabilities such disconnection alert output, transmission output, communication, forced heating, and blasting are included in various versions in addition to basic functions.

What are the characteristics of the digital temperature and humidity controller?

1. It has high measurement accuracy, low circuit power consumption, and strong environmental adaptability; it is light and takes up less space, and can be used in combination with standard sensors and heating plates; it adopts LED digital tube combined display, and the data is clear.

2. Both the temperature and humidity signals of the temp and humidity controller can be obtained at the same time. According to the basic requirements of the automation equipment for the temperature and humidity of the studio, the range of temperature and humidity control is set by numbers. Using intelligent programs to control heaters and cooling fans can protect electrical equipment well no matter in winter, summer or rainy days.

3. The thermostat and humidity controller is rich in varieties and complete in specifications, and are produced in strict accordance with standard sizes.

4. It can be equipped with 485 communication and network design, which can be easily connected with remote systems of various power networks.

Classification of digital temperature and humidity controller

The two main categories of temperature and humidity controllers are the conventional series and the intelligent series..

Ordinary temperature and humidity controllers are made of imported polymer temperature and humidity sensors, combined with stable analog circuits and switching power supply technology. Relay action, heater fault power supply and other working status are indicated by LED, which is clear to the user at a glance. The digital temperature and humidity controller is stable and reliable, and can work in harsh environments such as strong electromagnetic fields for a long time.

The intelligent temperature and humidity controller uses digital tubes to display temperature and humidity values. For remote monitoring, it contains an RS485 communication interface, a heater, sensor fault indication, transmission function, and transmission capability. By using key programming, users can independently change system parameters. With excellent accuracy and a broad measurement range, the temperature and humidity controller combines measurement, display, control, and communication. It is a device for measuring and controlling temperature and humidity that can be used in a variety of disciplines and industries.