NHS fetal anomaly screening programme (FASP) and Population screening programmes. Read an overview of the NHS fetal anomaly screening programme (FASP), and learn how to contact the programme.
These small solid particles cause the liquid to appear turbid. Turbidity (or haze) is also applied to transparent solids such as glass or plastic. In plastic production haze is defined as the percentage of light that is deflected more than 2.5Â° from the incoming light direction.
Turbidity, as an optical property of water, is one of the more difficult parameters to measure. How murky or opaque water is can be a subjective measurement 1. Based on the measurement method, different units have been defined to standardize turbidity levels and allow comparisons.t can be measured relative to water clarity, or directly with a turbidity instrument such as a turbidimeter or turbidity sensor. Turbidity sensors may also be referred to as submersible turbidimeters 28. Water clarity methods involve a secchi disc or tube.