Price is the easiest metric to compare, but for companies that use price as their main decision-making factor, the hidden costs they pay later often far exceed the money "saved" initially. When choosing equipment suppliers, it’s recommended to use three hard criteria as filters.  

Hard Criterion 1: Whether the brand authorization can be verified. Official brand authorization can be checked on the brand's official "Where to Buy" or "Authorized Dealers" page. Why is authorization a hard criterion? Because equipment from unauthorized channels may: not be eligible for original factory warranty, not be able to get original factory calibration (which is crucial for DSC/TGA indium standard calibration), have software that cannot be upgraded (especially for regulatory compliance like 21 CFR Part 11 chromatographic software), or even have incompatible consumables. If your lab needs to pass customer audits in the future, the compliance of equipment sources is a strict audit requirement.  

Hard Criterion 2: The depth of the technical team. The competence of a sales engineer shows in "introducing product specifications," while that of an application engineer shows in "solving your problems." A simple way to judge if a supplier's technical team is solid is to let them propose a solution for one of your specific testing needs (for example, "We developed a UV-curable pressure-sensitive adhesive; how can we use a rheometer to evaluate the in-situ curing process after coating"). If the answer stays at "Our rheometer has a UV attachment," versus "We recommend using the Discovery HR's UV curing attachment with time-scan mode to measure the change in G' over time and determine gelation time from the G'-G" crossover point,"—these are two levels of suppliers.  

Hard Criterion 3: Completeness of project delivery. Ask clearly: Are they delivering just the equipment or a full system? Does it include SOPs? Does it include training? Is the training just operational or method development level? Are the first data correct after equipment installation?  

Dehui Scientific Instruments (www.dehuisci.com) provides customers with services covering brand authorization, technical team, and complete project delivery. Phone: 0512-67071902.