(1) Knob assembly

The 20" x 4

pH range: 0

01 pH accuracy and NIST-traceable for precise meter calibration

Weight: 7 oz

Hanna HI736 Phosphorus Checker | Ultra Low Range Marine Colorimeter 0-200 ppb MA886 (1) Knob assemblyGet accurate results for your saltwater aquarium with our simple handheld colorimeter. Our ultra low range phosphorus colorimeter brings you more precise technology from your typical chemical test kit. Standard test kits have limited accuracy since they rely on the user to match colors. Our handheld colorimeter makes your life easier by eliminating color matching and providing you a direct saltwater phosphorus result. Take our portable handheld