This file introduces the use and characteristics of Hanna HI 4105 Carbon Dioxide Ion Selective Electrode.
The Hanna Instruments HI 4105 is a combination carbon dioxide gas sensing electrode designed to measure CO2 in aqueous solutions like water, soft drinks, or wine. It operates by converting carbonate and bicarbonate ions into carbon dioxide gas using an Ionic Strength Adjuster (ISA), allowing the sensor to detect total dissolved CO2.
| Species detected | CO2, gas sensing electrode with glass pH internal, Ag/AgCl reference and gas permeable membrane. |
|---|---|
| Measurement Range | 0.02M to 4x10^-3 M (880 to 17.6 ppm) |
| Interfering ions | SO4, S2O3, H2S/S2- |
| Operating Temperature | 10 to 40°C |
| Dimensions | 12 mm (OD) X 120 mm (insertion) |
Calibration should be checked every 1-2 hours and recalibrated if necessary.
ISA adjusts the pH to about 4.7, converting carbonate and bicarbonate ions to carbon dioxide, and stabilizes solution activity.