System for sensing ions in aqueous solution

Details System for sensing ions in aqueous solution System for sensing ions in aqueous solution

G - Physics

01

N

73/55

G01N 21/25 (2006.01) G01N 21/85 (2006.01) G02B 6/32 (2006.01) G12B 17/02 (2006.01)

Patent

CA 1314408

ABSTRACT OF THE DISCLOSURE The system for sensing ions in aqueous solution such as an electrolating bath includes a light source (18) which delivers light including a selected wave- length through a series of optical fibers (20, 24, 26, 32) to probe (14). The probe is partially immersed in the solution (12) and the light is delivered through the solution in the space (94) between prisms (82, 92). The return light is conducted by optical fibers (32,38) to detector or opto-electronic transducer (44). A portion of the original light is diverted by splitter (22) through fiber (42) to opto-electronic transducer (46) so that a comparison of the signals determines the amount of light in selected wavelength is absorbed in the solution due to ions thereon. The signal processing unit (40) is preferably enclosed in an electromagnetic . protected area (16) to avoid the adverse EMI and corrosive atmosphere effects near the electroplating tank (10).

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