DiST's 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. This tester
features an amperometric graphite electrode that provides better
repeatability in measurements since they do not oxidize. An
amperometric measurement of 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 DiST's non-oxidizing graphite pins are
able to provide an optimal surface for accurate, dependable
results. When calibration is necessary, simply submerge the
electrode tip into calibration solution and adjust the trimmer on
the side of the tester. Range: 1999 ppm ( milligrams per liter).
Resolution: 1 ppm ( milligrams per liter). Accuracy: +/-2 percent
F.S. TDS Factor: 0.5. Calibration Solution: HI70442. Calibration:
manual, 1 point. Probe: HI73301. Temperature Compensation:
automatic, 0 to 50 degree C (32 to 122 degree F). Battery
Type/Life: 1.5V (4)/approximate 200 hours of continuous use.
Environment: 0 to 50 degree C (32 to 122 degree F); RH max 95
percent. Weight: 3.4 oz. Measures 1-19/32" length by -57/64"
width by 6-57/64" height.
Hanna Instruments HI98301 DiST1 EC and TDS Tester, 0.5 TDS Factor, 1999 mg/L (ppm), 1 mg/L (ppm) Resolution, +/-2% Accuracy