- Determine the user’s industry
Constant temperature and humidity boxes are currently used in the following industries: ① pharmaceutical factories ② food factories ③ cosmetics ④ textile industry ⑤ colleges and universities. (Pharmacy users can choose a more professional and targeted drug stability test box)
- Determine the two parameters that need to be controlled in the experiment: ① temperature range; ② humidity range; ③ humidity control method
① Temperature range: Considering the experiments and samples, the temperature range will be wider than the drug stability test box mentioned earlier. So generally, when we choose a cabinet, we first confirm the temperature range we need, and then we choose the equipment. Generally, we see that the temperature range is below minus temperature and that it is heated from room temperature, for example: -10 ~ 100 ℃;- 40 ~ 100 ℃; RT + 10 ~ 85 ℃ and so on.
② Humidity range: Similarly, the constant temperature and constant temperature box is considered from the experiments and samples. The general humidity range is between 45 ~ 95% RH, and there will be a relatively small range of requirements, such as 60 ~ 85% RH. In our Before choosing a constant temperature and humidity box, what is the temperature you need to use during your experiment? At this temperature, how much humidity to control, you may wish to determine a few common temperature and humidity points, and then choose the thermostat that is suitable for your own use. This way, you can choose the one that suits you best and save costs. Use the price to measure the constant temperature and humidity box, otherwise it is very likely that you can buy a product that is not suitable for your own use at a low price. After determining the humidity range, you should pay more attention to the accuracy of the constant temperature and humidity box provided by the manufacturer. How much, the better is usually ± 3% RH. If it is not good, it is possible to reach more than ± 5% RH. This gap has an impact on our experiments.
③Humidity control methods: Different humidity control methods can help you determine the duration of the experiment and the accuracy of humidity. The more common humidity control method is the wet and dry ball control method. It is determined that the humidity needs to be changed in about two weeks; The other is the humidity control method of the humidity sensor. If the manufacturer chooses a good humidity sensor, the humidity control accuracy will be high. The advantage is that it avoids the trouble of frequent replacement of the wet belt.
- Determine the time range of the constant temperature and humidity box
This step is also a point that many of us will ignore. Many times, after we pass the above two steps, we start to determine the constant temperature and humidity box. In fact, because the constant temperature and humidity box is usually different from the medicine box, it is more suitable for short-term experiments. Use, so we should pay more attention to the time that the constant temperature and humidity box can run continuously. The experiment of the constant temperature and humidity box is generally controlled within 6 months. If it is more than 6 months, choose a medicine box.
- Determine the volume of the constant temperature and humidity box.
When choosing the size of the cabinet, we usually need to consider two aspects. The first is the location of the laboratory. This requires us to consider the relationship between the size of the cabinet and the size of the laboratory. Whether to enter the laboratory or not. The second is how much space is needed for the experimental sample. This point, we need to consider the volume of the inner tank of the box. Now the constant temperature and humidity box is as small as 50L, as large as 1000L, even a few cubic laboratories can do it, so Don’t worry about not having the right size, rest assured to determine the size you want.
- Determine if the constant temperature and humidity box needs programming function
The programming of the constant temperature and humidity box means that the temperature, humidity, and time can be set into several programs, and the device automatically switches. When we need to control different temperature and humidity points during the experiment and need to switch automatically after a certain period of time, we must choose a constant temperature and humidity box with a programming function, otherwise there is no way to run the experiment continuously.
- Constant temperature and humidity box accessories
the accessories of the drug stability test box are usually as follows:
Paperless recorder, printer: for storage and output of experimental data
Alarm system: Send SMS to the designated person’s mobile phone when the device fails, making the experiment safer and saving human capital.
3Q certification: Generally refers to the installation confirmation, operation confirmation, performance confirmation provided by the manufacturer, and there are formal 3Q certification documents.
Independent temperature limit controller: Double protection of the equipment is realized. On the basis of the original fault alarm, plus over temperature automatic power-off, it better protects the experimental samples from damage.