With the development of science and technology, more and more fields need to build high-precision constant temperature and humidity systems, and different industries have different requirements for constant temperature and humidity experimental environments.
When testing the physical properties of materials such as paper, cotton, textiles, packaging materials, polymer materials, and metal materials, it is necessary to conduct the test in a high-precision constant temperature and humidity experimental environment. Generally, the specific temperature and humidity indicators of this type of constant humidity laboratory are required to be ±0.5℃, ±1℃, ±2℃, ±2%RH, ±4%RH, ±5%RH, ±10%RH, etc. This type of laboratory can be built with a standard high-precision constant temperature and humidity system.
In the field of precision measurement or precision manufacturing, when conducting metrology testing, length measurement, three-coordinate precision measurement, laser measurement, interferometer precision measurement, mechanical processing, micro-nano processing and other work, an ultra-high precision constant temperature and humidity experimental environment is required. The specific temperature and humidity index requirements are ±0.01℃, ±0.05℃, ±0.1℃, ±0.5℃, ±1%RH, ±2%RH, ±5%RH, etc. This is an ultra-high precision constant temperature and humidity system, which requires special design of the entire system, using specially designed high-precision constant temperature and humidity air conditioners and their supporting systems, plus ultra-high precision constant temperature and humidity control systems, in order to achieve this ultra-high precision temperature and humidity control.

In the field of warehousing, raw materials or components are stored. This type of use environment does not require high requirements, and is generally achieved with ordinary constant temperature and humidity air conditioners.
In the field of scientific research, such as physics, chemistry, astronomy, materials science, etc., high-precision constant temperature and humidity systems are also used in scientific research experiments. Different design methods should be adopted according to different needs. If the requirements are not so high, such as ±1℃, ±2℃, ±5%RH, ±10%RH, high-precision constant temperature and humidity air conditioners can be used for direct construction. If an ultra-high precision experimental environment is required, such as 0.01℃, ±0.05℃, ±0.1℃, ±0.5℃, ±1%RH, ±2%RH, ±5%RH, etc., the entire system needs to be specially designed, using specially designed high-precision constant temperature and humidity air conditioners and their supporting systems, plus ultra-high precision constant temperature and humidity control systems, in order to achieve this ultra-high precision temperature and humidity control.