342ppm TDS CALIBRATION SOLUTION 

For use with the HM-DIGITAL HANDHELD PPM METER If you have a CALIBRATION SCREW like the

Precise Instruments TRIMETER then you can use this or the 1000ppm CALIBRATION SOLUTION also sold in my store.

This is a larger bottle than the pH 4 and 7 Calibration solutions also sold in my store.

SPECIFICATIONS:

3oz / 90ml Bottle

HM-Digital Brand

342 ppm 

PROCEDUE:

For information on calibrating your TDS Meter, please visit www.hmdigital.com/calibration_maintenance.html