Abstract
The invention relates to an arrangement at measurement of pH or another chemical property detectable by dye indicators, the arrangement comprising a glass sheet or a similar substrate to be immersed into a solution to be measured, the substrate being coated with a dye film arranged to change its colour when a chemical property of the environment changes, and means for leading light through the substrate to the dye film.
| Original language | English |
|---|---|
| Patent number | US 6208423 B1 |
| IPC | G01N21/55, G01N21/78, G01N21/80 |
| Priority date | 19/06/98 |
| Publication status | Published - 27 Mar 2001 |
| Externally published | Yes |
| Publication type | H1 Granted patent |