Apparatus for measuring impurities in pure water

Claim 1

An apparatus for measuring the concentration level of solid impurities in water of at least a predetermined minimum size, comprising a sampling pipe for guiding water whose concentration level of impurities is to be measured, branch means for dividing water flowing through said sampling pipe into first pipe means and second pipe means, said branch means being operatively connected to said sampling pipe and said first pipe means and said second pipe means, a first filter means of a predetermined pore size for filtering water flowing through said first pipe means and operatively connected thereto, first flow rate detecting means for detecting the flow rate of water filtered through said first filter means, said first detection means operatively connected to said first pipe means at a point near said first filter means, a second filter means for filtering water flowing through said second pipe means and operatively connected thereto, said second filter means having a smaller pore size than said first filter means; second flow rate detecting means for detecting the flow rate of water filtered through said second filter means, said second detecting means being operatively connected to said pipe means at a point near said second filter means; and operation means for successively calculating the relative ratio of the time dependent change in the flow rate of water detected by said first flow rate detecting means to the time dependent change in the flow rate of water detected by said second flow rate detecting means, whereby the concentration level of solid impurities which will not pass through said second filter means can be measured.

Claim 2

An apparatus for measuring the concentration level of solid impurities in water of at least a predetermined minimum size, comprising a sampling pipe for guiding water whose concentration level of impurities is to be measured, branch means for dividing water flowing through said sampling pipe into first pipe means and second pipe means, said branch means being operatively connected to said sampling pipe and said first pipe means and said second pipe means, a first filter means of a predetermined pore size for filtering water flowing through said first pipe means and operatively connected thereto, first flow rate detecting means for detecting the flow rate of water filtered through said first filter means, said first detection means operatively connected to said first pipe means at a point near said first filter means, a second filter means for filtering water flowing through said second pipe means and operatively connected thereto, said second filter means having a smaller pore size than said first filter means; second flow rate detecting means for detecting the flow rate of water filtered through said second filter means, said second detecting means being operatively connected to said pipe means at a point near said second filter means; and operation means for successively calculating the relative ratio of the time dependent change in the flow rate of water detected by said first flow rate detecting means to the time dependent change in the flow rate of water detected by said second flow rate detecting means, whereby the concentration level of solid impurities which will not pass through said second filter means can be measured.