Calibration Standard HI 715 Checker HC ®

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

Range 0.0 - 99.9 ppm NH3-N | Nessler Method | 0.1ppm resolution

The HI 771 Checker®HC is a simple, accurate, and cost effective way to measure ultra-high ranges of chlorine. Designed as a more accurate alternative to chemical test kits, the HI 771 provides quick, accurate results in four easy steps.

Range 0.0 - 30.0 ppm | amino acid method | Resolution 0.1ppm