Turbidity describes the clear or cloudy appearance of water. Clear water has a low turbidity level, and cloudy water has a high turbidity level. High turbidity levels in water is the result of the presence of suspended matter, such as soil, sediments, sewage, phytoplankton and other microscopic organisms.

Suspended particles cause light to be scattered or absorbed rather than transmitted normally, in straight lines, through the water. As the number of particles increase, more light is scattered/absorbed. An increase in turbidity, hence a decrease in transmitted light, can;

ACT-UIS turbidity measurements are carried out using a nephelometer which is a turbidity meter that measures scattered light at an angle of 90º. Results are reported in Nephelometric Turbidity Units (NTU). The instrument is calibrated before each use, with quality control checks performed consecutively. The nephelometer has a measuring range of 0 – 1000 NTU offering clients speedy, reliable, and reproducible results!