Infants and young children's thermoregulation is not mature enough, so they are easily affected by the environment. Generally, the most suitable temperature for babies is around 22°C, not lower than 18°C and not higher than 28°C. Through linkage of temperature and humidity and air conditioner, the baby room's temperature can be kept at the constant temperature. Humidity is equally important to children. Their nasal mucosa is relatively fragile. "Too dry" easily affects their respiratory health, but "too humid" easily breeds bacteria. Generally, the perfect humidity is about 50%. Humidifiers, windows and other equipment can be used to adjust the humidity. Every family needs a temperature and humidity sensor, to give babies motherly care.

Due to the limitation of human body's regulation, the lower limit temperature of "cold tolerance" is around 11 °C, and the upper limit temperature of the "heat tolerance" is around 32 °C. The upper limit of the relative humidity of air should not exceed 80%, and the lower limit should not be lower than 30%. Human temperature sensing also changes with the seasons. In winter, the temperature is 18 to 25°C, and the humidity is 30-80%. In summer, the temperature 23 to 28°C and the humidity 30-60%. In these ranges, more than 95% of people feel comfortable. In a room with an air conditioner, when the room temperature is 18 to 20°C and the humidity is 40 to 50%, people will feel more comfortable. In an office, the most suitable temperature for mental workers is around 18°C and humidity is 40-60%. In such environment, people feel fresh and work efficiently. Today, there are more and more green plants in the office. The green plants also need a suitable environment. For example, the best temperature for the spider plant is 15 to 25°C.

At home, office or factory, warehouse is a common place. It's very important to prevent fire and guard against theft. Besides, it's also necessary to prevent and control humidity. When the temperature and humidity in the warehouse are not suitable for storage of items, we should take effective measures to adjust them in time. For example, the environment for storing a guitar is relatively demanding, in which the temperature is 21°C and the humidity is 25%-75% generally. "Extremely humid or dry" will cause serious damages to an instrument. Especially when your guitar is moved from a particularly humid environment to an extremely dry environment, no matter how good your guitar is, your guitar will crack after all water in it evaporates. For example, cigars are usually stored at the temperature of 21°C and humidity of 70%. It is the perfect environment for cigars. For example, the button batteries should be stored at the temperature of 20±5°C and humidity of (65±20)%. The higher storage temperature indicates the less remaining capacity.

There is a lot of development space for temperature and humidity in the fresh cold chain industry. With the outbreak of epidemic, more and more fresh food is sold online and more medicines and vaccines are on the way. No matter fresh food is in the supermarket or in transportation, we need to keep all of them fresh by temperature and humidity sensor. Therefore, we must have high standards for temperature and humidity during transportation. In this case, the monitoring system of the temperature and humidity sensor plays the most important role in transportation. Medicine storage also has requirements on temperature. Some medicines need to be stored in a low temperature of 2 to 10°C, because medicines will deteriorate or deform at high temperatures. Besides, there are standards for temperature and humidity of medicines to be refrigerated, frozen and transported in the medical devices management regulations.