Range : 0 to 300 ppm CaCO₃
Resolution : 1 ppm
Accuracy @ 25°C/77°F ±5 ppm : ±5% of reading
Light Source : LED @ 610 nm
Light Detector : silicon photocell
Environment : 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type : (1) 1.5V AAA
Auto-off : after ten minutes of non-use
Dimensions : 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5”)
Weight : 64 g (2.3 oz)
Method : colorimetric method. The reaction causes a distinctive range of colors from yellow to green to blue to develop