Hanna Marine Nitrite ULR (ppb) Checker® HI764

Achieve accurate water testing results with our simple handheld colorimeter. The HI736 Marine Phosphorus Ultra Low Range (0 to 200 ppb) Checker uses more precise technology than a chemical test kit. The HI736 checker uses a fixed wavelength LED and silicon photo detector to determine the measurment results digitally, eliminating the need to compare results to a color chart.

• Compact, portable design
• Built-in timer
• One-button operation