The document describes the R Water Beryllium Content Detector Model No. 174-SC, an economical single-element meter designed for quantitative detection of beryllium in liquid samples. It features a silicon light source, high sensitivity, low power consumption, and provides results within three minutes. Applications include analyses of various types of water, with specifications detailing a measurement range of 5.00-30.0 mg/l and an accuracy of ± 3%.