HI 749 Checker®HC Handheld Colorimeter – Chromium VI LR The HI 749 Checker®HC is a simple, accurate, and cost effective way to measure low ranges of chromium VI in fresh water.  Designed as a more accurate alternative to chemical test kits, the HI 749 provides quick, accurate results in four easy steps. 1.) Step One – Add a sample to the included cuvette(s) 2.) ... Read More »