Easier to use and more accurate than chemical tests kits SPADNS method ±0.5 ppm ± 5% of reading accuracy Large, easy to read digits Auto shut off . Designed to work with HANNA’s reagents uses 10ml glass cuvettes. Weighing 64g (2.25 oz.) single button operation: zero and measure operated by a single AAA battery. Range 0 to 20.0 ppm Resolution 0.1ppm Accuracy at 25 degree, LED light source at 575 nm, Silicon photocell. 0 to 50 degree Celsius (32 to 122 Fahrenheit
