1. Range: 410, 500, 540, 590 and 650nm available 2. 26 Parameters:Total Chlorine/Residual ChlorinepH/etc. 3. colorimeter Application areas SW-1 Multi-parameter Food Quick Tester can be used in the food tests of agricultural products, QC, Cereals and Oils tests. It can be applied in Supervision & Inspection Department, schools, hotels, restaurants, fast food, food industries, agriculture market, ...