Hanna HI 772 Seawater/Marine Alkalinity (dKH) Colorimeter

Range : 0.0 to 20.0 dKH Resolution : 0.1 dKH Accuracy : ±0.3 dKH ±5% of reading Light Source : LED @ 610 nm Method : colorimetric method Environment : 0 to 50°C; RH max 95% non-condensing Battery Type : (1) 1.5V AAA Auto-off : after ten minutes of non-use Dimensions : 86 x 61 x 37.5 mm Weight : 64g Method : Colorimetric method. The reaction causes a distinctive range of colours from yellow to green to blue to develop