Featuring a replaceable probe

Filter Capacity: Up to 10

and extends the operational life of your ORP57 PRO Tester investment

Aquaponics & aquaculture systems

Compatible Meters: Designed exclusively for Milwaukee MW170 and MW180 bench meters

Hanna Saltwater Aquarium Ultra Low Range Nitrite Colorimeter - Checker HC - HI764 freshwater testing Featuring a replaceable probeStop struggling to get accurate results for your saltwater aquarium with our simple handheld colorimeter. Our nitrite colorimeter fills the gap between nitrite test kits and advanced instrumentation. Standard test kits have limited accuracy since they depend on the human eye to determine colors. Our handheld colorimeter eliminates the trouble of matching to a color chart by providing a direct saltwater nitrite result. Our portable handheld colorimeter