Technical data:

Total measurement ranges:

Na 0.01 – 4500 mg/l (ppm) ≘ 0.0004 – 200 mmol/l
K 0.02 – 4500 mg/l (ppm) ≘ 0.0005 – 110 mmol/l
Li 0.02 – 3000 mg/l (ppm) ≘ 0.0028 – 420 mmol/l
Ca 0.30 – 3000 mg/l (ppm) ≘ 0.0075 – 75 mmol/l

Sensitivity:

Na < 1 μg/l (ppb) ≘ 0.04 μmol/l
K < 2 μg/l (ppb) ≘ 0.05 μmol/l
Li < 2 μg/l (ppb) ≘ 0.28 μmol/l
Ca < 30 μg/l (ppb) ≘ 7.50 μmol/l

Interference filter (multiple filters capture the total measurement range):

Na 589 ± 2 nm
K 767 ± 2 nm
Li 671 ± 2 nm
Ca 622 ± 2 nm