accurate results and extends probe life:

stainless steel sample well with unit rated to IP65 as "dust tight" and protected against water jets

TDS Range: 0 – 5000 ppm

1000-9990: 10 µS/ppm

Investment in Peace of Mind

HM Digital C-342 TDS and EC Calibration Solution - 342 ppm NaCl 3 oz BPA-free bottle accurate results and extends probeFor optimal performance, re calibrate your meters periodically or if testing TDS or conductivity levels in wide or different ranges. FEATURES: NaCl calibration solution, 342 ppm Comes in lightweight HDPE plastic bottles Sealed with a coated foam liner PRODUCT DESCRIPTION NaCl solution 3 oz. bottles (90 ml) C342 UPC: 891144000014 Solution Conversions 342 NaCl = 362 as KCl ; 478 as 442 ; 700 S 1000 NaCl = 1060 as KCl ; 1450 as 442 ; 2000 S