Calibration Standard HI 726 Checker HC ®

Range 0:00 to 5:00 ppm | EPA Method 315 B | 0.01ppm resolution

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 - 200 ppb | ascorbic acid method | Resolution 1 ppb

Range 0 - 150 ppm | ferrous sulfate method | Resolution 1ppm