The Apera Instruments TDS20 is the most reliable and affordable pocket TDS (ppm) tester for routine testing across various applications, including tap and drinking water, agriculture, aquaculture, swimming pools, and education.
Its advanced platinum black conductivity probe ensures accurate and consistent measurements across a wide range. The ultra-clear 180˚ viewing angle screen displays temperature and TDS values simultaneously, with indicators for completed calibrations and stable readings.
The TDS20 comes as a complete kit, including calibration solutions (1413 µS and 12.88 mS), AAA batteries, a lanyard, and a durable carrying case. It offers 1-2 points of auto-calibration, 0–50˚C automatic temperature compensation, and ±1% F.S. accuracy within a 0–20.00 mS/cm conductivity range.
Additional features include self-diagnosis with out-of-range warnings and incorrect calibration reminders. The IP67 waterproof and dustproof design ensures durability, and its ability to float provides peace of mind during accidental water drops. Powered by AAA batteries, the TDS20 supports up to 200 hours of continuous operation, with a low battery warning and auto power-off after 8 minutes of inactivity.