A FILTER SELF-CLEANING SYSTEM FOR MEASURING CONTAMINATED SUBSTANCE

摘要

The present invention relates to a 2-bed type filter capable of self-cleaning according to change of pressure, more specifically, to a filter capable of improving the reliability of the measured value of contamination. The present invention comprises a first filtering body (10), a second filtering body (20), a polluted water supply pipe (30), a fresh water supply pipe (40), three-way solenoid valves (51, 52), a drain hose (60), pressure sensors for measuring water pressure, and a control circuit (80).