DiSTs are rugged and reliable pocket-sized testers that offer quick and accurate readings of conductivity or TDS. The DiST® family of testers is widely used for monitoring EC/TDS in drinking water, water conditioning, reverse osmosis, cooling towers, wastewater, laboratories, agriculture, aquaculture and aquariums, hydroponics and the printing industry. These testers feature an amperometric graphite electrode that provides better repeatability in measurements, since they do not oxidize. An amperometric measurement of EC/TDS is based on Ohm’s Law, I = V/R, where R depends on the distance between two pins and their surface. Oxidation changes both the distance and surface, which will affect accuracy. The DiSTs non-oxidizing graphite pins are able to provide an optimal surface for accurate, dependable results. When calibration is needed, simply submerge the electrode tip into calibration solution and adjust the trimmer on the side of the tester.

Specifications

Parameter	TDS

 

TDS Range	10.00 g/L (ppt)
TDS Resolution	0.01 g/L (ppt)
TDS Accuracy	±2% F.S.
Calibration	manual, one point
Temperature Compensation	automatic from 0 to 50°C (32 to 122°F)
TDS Conversion Factor	0.5
Calibration Solution	HI70038: 6.44 ppt
Battery Type / Life	1.5V (4) / approximately 200 hours of continuous use
Electrode/Probe	HI73302
Environment	0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions	175 x 41 x 23 mm (6.9 x 1.6 x 0.9’’)
Weight	95 g (3.4 oz.)
Ordering Information	HI98301 (DiST®1), HI98302 (DiST®2), HI98303 (DiST®3) and HI98304 (DiST®4) are supplied with protective cap, screwdriver, batteries and instructions.