Calibration Solution TDS Conductivity Conversions

TDS Conductivity Solution Conversions



Please email for any other conversions and we will add them for you.

TDS/NaCl - sodium chloride, ~ 0.5 of the conductivity.

TDS/KCl - potassium chloride, ~ 0.7 of the conductivity.

TDS/442 - Mixture of (4 sodium sulfate + 4 sodium bicarbonate + 2 sodium chloride, by Myron L).



TDS (ppm) Conductivity (µs) Solution Conversions (at 25°C)

TDS/NaCl --- TDS/KCl --- TDS/442 --- EC (µS)

xxx ---------- (800) --------- xxx --------- xxx

(342) ---------- 362 --------- 478 --------- 700

702 ------------ 745 -------- 1000 ------- (1413)

(1000) ------- 1060 -------- 1450 -------- 2000

1036 --------- 1095 ------- (1500) ------- 2060

1315 -------- (1382) ------- 2063 -------- 2764



HANNA TDS1 Meter --- use 800 ppm TDS/KCl calibration solution only!

HANNA Primo TDS Meter --- use 1382 ppm TDS/KCl TDS calibration solution only!

All other TDS Meters --- use 800 ppm TDS/KCl, 1382 ppm TDS/KCl, 1500 ppm TDS/442 solution or any other TDS calibration solutions, please check the meter manual and select a calibration solution close to your testing solution type and range.

Unlike the pH/ORP meters, no storage solution is needed for TDS meters.