The Dist® Testers family is widely used to measure CE / TDs in drinking water, water conditioning, cooling towers, wastewater, laboratories, agriculture, aquaculture and aquariums, hydroponics and printing industry.

The Hi98302 Tester is a portable meter that facilitates rapid and precise readings of total dissolved solids (TDS). The housing has been designed to increase its solidity and to adapt better to your hand. It has a large display screen to facilitate readings. 

This meter has an amperometric graphite electrode that provides greater repeatability in the measurements, since it does not oxidize. An amperometric measure of CE / TDS is based on the OHM law, 1 = v / r, where r depends on the distance between two pins and their surface. Oxidation changes both distance and surface, which will directly affect precision. Non -oxidizing graphite pins are able to provide an optimal surface to obtain precise and dependent results.

When it is required to calibrate, the tip of the electrode is simply immersed within the calibration solution and the potentiometer is adjusted to the side of the meter. When the standard value is recognized and stability is reached, the meter will automatically accept and store the calibration value.

Configuration options include automatic off timing and temperature unit. Automatic off options are to turn off the meter after 8 minutes, 60 minutes or disabled. To enter the configuration mode, the user clicks a button located in the battery compartment.

In short, its main characteristics are:

• Simple to use: only 2 buttons
• Graphite sensor that allows better repeatability since it does not oxidize
• Waterproof
• Automatic calibration at a point
• Automatic off