[For seawater] Ultra-low concentration phosphate checker HI774 1 unit

Phosphate in seawater can be easily measured. Reliable digital display for peace of mind, no visual inspection required Amazing cost performance for a digital measuring instrument Palm-sized for easy carrying and storage Easy operation with just one button, even beginners can use it with confidence. Measurement range: 0.00 to 0.90 ppm Resolution: 0.01 ppm Accuracy: ±0.02ppm ±5% of measured value @25℃ Measurement method: Ascorbic acid method External environment: 0 to 50°C, relative humidity 95% or less (no condensation) Light source: LED (525 nm) Light receiving part: Silicon photocell Power supply: 1 AAA alkaline battery Automatic power off: After 7 minutes of non-use, 2 minutes of measurement Size: Length 86.0 x Width 61.0 x Thickness 37.5mm Weight: 52g