The Water Potassium Content Detector (model ACM-140-SC) is a single element potassium concentration meter that uses a colorimetric assay to quantitatively detect potassium content in liquid samples. It works by forming colored compounds when the sample reacts with a reagent. The detector comprises a light source, lenses, color bottles, and photocell. It displays potassium levels on a direct read LCD meter. Applications include analysis of water samples like steam distillation water, drinking water, sea water, and waste water. Key features are no moving parts, high sensitivity, fast analysis speed, low power consumption, and small size. It has a measuring range of 1-20 mg/L or 30-100 mg/L