WATER QUALITY MEASURING APPARATUS WITH A SENSING WAFER CLAMPED BETWEEN TWO O-RINGS

摘要

An improved mechanical arrangement for water quality measurement apparatus in which a plurality of multi-element arrays formed on a substrate are immersed in a solution for detecting electroactive elements or compounds present in such a solution. The present invention offers substantial improvements to the known methods in which wafer type sensors are held in place within the mechanical devices used with this type of water monitoring apparatus. According to the present invention there is provided measuring apparatus including a wafer located between a first and a second "O" ring, with said first "O" ring being disposed on a first side of said wafer and said second "O" ring being disposed on a second side of said wafer, said second side being opposite to said first side, arranging said first and said second "O" rings such that said wafer is exposed to substantially equal pressure on both said first and said second sides of said wafer.