Conductivity and TDS: Which is better for field-testing?

摘要

The POU/POE market is currently seeing a sharp increase in both sales demand and the perceived need for handheld and in-line process meters and controllers, probably as a direct result of the public's concern for their safety and health related to water consumption. Traditionally referred to as handheld devices, and used by POU/POE industry professionals to measure at least one water quality parameter, meters are becoming increasingly sophisticated, but not necessarily more accurate or easy to use. Compounding this problem is a need for regulators and manufacturers of these devices to educate both dealers and consumers on which parameters are genuinely important on a real time basis for ensuring the public's health and safety and which are not. The following information will outline why total dissolved solids (TDS) values in handheld and in-line process meters and controllers differ from analytical lab results.