How to Avoid Misleading Customers in On-Site Water Purifier After-Sales Demonstrations: Correcting Common Misconceptions
In after-sales demonstrations, a portable water quality tester can help determine whether a water purifier is working and whether the filter cartridge has failed, but the boundary between screening and laboratory verification must be made clear. This article starts from the applicable audience, sampling steps, interpretation of results, correction of misconceptions and record checklists, and provides a reproducible on-site demonstration method.
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