Hanna Instruments TDS Calibration Solution

For optimal performance, re-calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges.The only way to know your TDS meter is giving an accurate reading is to calibrate it often. Foil packs are great but they need to be thrown away after each use. Our Solution measures a standard conductivity of 1,382 ppm and comes in a 7.7 ounce size!

1 1382 PPM 7.7 oz bottle of calibration solution