I've been creating equipment plans for new materials labs for 13 years and have seen too many cases of 'buy the wrong equipment and then come to us for fixes.' Here’s a summary of the five most common traps, each costing tens of thousands or even hundreds of thousands of yuan.  

First trap: buying only the main machine without accessories. The classic example is buying a rheometer with only a parallel plate fixture, then realizing that for coating tests you also need a cone-and-plate fixture, and for low-viscosity samples you need a coaxial cylinder. Adding accessories later isn’t just expensive (buying separately can cost 30-50% more than with the main unit), it also wastes time.  

Second trap: choosing a cheaper configuration to save money, only to find the data is unusable. One client tried to save 80,000 yuan by buying a rheometer without a normal force sensor, but then when measuring the elasticity of polymer melts, data was missing, and their paper’s results didn’t match industry literature—they had no choice but to upgrade.  

Third trap: only looking at the equipment price and ignoring the environment. A 500,000-yuan DSC placed in a regular room without temperature and humidity control and without dedicated grounding, right under the air conditioner vent, experienced ±5℃ temperature fluctuations; the measured Tg varied 3-5℃ during the day—completely unusable.  

Fourth trap: ignoring software and data management. Buying high-end equipment but only using basic software functions, exporting all data manually to Excel. Good data analysis software is often worth more than the hardware itself.  

Fifth trap: not considering training and maintenance after purchase. The supplier delivers the equipment, hands over an English manual, and leaves—this isn’t selling equipment, it’s passing the buck.  

Dehui Scientific Instruments (www.dehuisci.com) covers the full delivery chain in every plan, from equipment and accessories to environment and training. Phone: 0512-67071902.