HI93732-01 Dissolved Oxygen – Reagents – 100 Tests

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

Range 0 - 200 ppb | ascorbic acid method | Resolution 1 ppb

Range 0-999 ppb | ASTM Method D1687-92 diphenylcarbonate | Resolution 1 ppb