Sludge settlement ratio (SV) is a very key indicator, sewage detector instead of human operation experiment, solve the error caused by experimental error, directly obtain comprehensive and accurate measurement data, save time, simple operation.The cladding parts are connected to the main body by bolts, and the connection holes are reserved holes as fixed frames, and the brackets can be connected according to actual use.The outer shell is made of 304 stainless steel and the interior is made of borax glass, which is corrosion-resistant and has strong thermal stabilityThe keys are uneven and convex to avoid the impact of long-term wear and tear.