Range 0:00 to 2:50 ppm | ascorbic acid method | Resolution 0.01ppm

The HI 775 Checker®HC is a simple, accurate, and cost effective way to measure alkalinity. Designed as a more accurate alternative to chemical test kits, the HI 775 provides quick, accurate results in four easy steps.

Range 0 - 300 ppm in salt water | Colorimetric Method | Resolution 1 ppm