The first step See if it has multiple functions, including air cooled scroll chillers and medicine storage box two functions, flexible switch considering that there are not many chromatography experiments in the laboratory on a daily basis, and the vast majority of laboratories just put small equipment into air cooled scroll chillers, The preservation of medicines, reagents, etc. is an essential need for every laboratory, so the multi-functional air cooled scroll chillers can greatly improve its efficiency and reduce costs.

Step 2: The smaller the temperature uniformity value, the more uniform the temperature inside the cabinet, the stronger the protective effect on the sample, and the better the result. A temperature uniformity of ±1 degree is preferred.

Step 3: Check if the compressor brand used in the refrigeration system has a good reputation. The vast majority of laboratory refrigeration equipment uses this brand, such as most ultra-low temperature refrigerators, and the price of this brand is generally 2 to 3 times that of other brands. The second-tier ones include some Copan (for thermal power customization) and Tecumseh in France, while the third-tier ones include Zanussi and domestic Kona, etc.

Step 4: Examine the aerodynamic design inside the cabinet to see if it can form a stable active cold air flow covering the entire box. Generally, a separate air duct needs to be designed to ensure that no short-circuit air flow is formed and to guarantee high temperature performance indicators.

Step 5: Check if all the accessories equipped on the device are complete and if a shelf can be configured. To achieve the dual purpose of chromatography and drug preservation and improve the utilization efficiency of the cabinet; Whether the chromatographic column fixing column and clips are configured, and whether they are convenient to use and do not occupy space; Is it equipped with an internal power socket and does it have waterproof performance? Is there a shelf configured on which instruments and equipment can be placed?

Step 6: After-sales Service At present, the vast majority of brands sell through the form of dealers purchasing goods. In this way, dealers and manufacturers basically make a one-time transaction, and subsequent after-sales service is very difficult to carry out. When choosing a brand with a fixed agent, the cooperative relationship between the agent and the manufacturer is relatively stable, and the after-sales service is guaranteed.

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