HI93713-01 Phosphate LR – Reagents – 100 Tests

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

The HI 761 uses an adaptation of the USEPA method 330.5. The reaction between the chlorine and DPD reagent causes a pink tint in the sample.

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