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HM Digital C342 342 ppm / 700 µS TDS/EC Calibration Solution, 90ml
HM Digital C342 C 342 ppm / 700 µS TDS/EC Calibration Solution, 90ml, 3oz 891144 000014
342 ppm as NaCl; 362 as KCl; 478 as 442; 700 µS
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