Phosphate Range: 0.00 to 0.90 ppm
Phosphate Resolution: 0.01 ppm
Phosphate Accuracy: +/- 0.02 ppm +/- 5% of reading
Phosphate Method: adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, Ascorbic-Acid method. The reaction between phosphate and the reagent causes a blue tint in the sample.
Photometer/Colorimeter: Light Source LED @ 525 nm
Photometer/Colorimeter Light Detector: silicon photocell
Battery Type/Life: (1) 1.5V AAA
Automatic Shut-Off: after seven minutes of non-use and two minutes after taking a reading
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight: 64 g (2.25 oz.)
Dimensions: 86.0mm x 61mm x 37.5mm (3.4" x 2.4" x 1.5”)
Ordering Information: HI774 Checker® is supplied with (2) sample cuvettes with caps, phosphate ULR reagent for 10 tests, battery, instructions and quick start guide.