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In Process Monitoring of Dissolved Carbon Dioxide
CO2 Dipping Probe DP-CD1
The CO2 dipping probe DP-CD1 is an optical sensor based on a 2 mm polymer optical fiber. The end of the probe is covered in a high-grade steel tube. It is the solution for invasive measurements and monitoring of dissolved CO2.
- Online monitoring
- Measurement range from 10 - 250 hPa pCO2 (8 ... 180 mmHg)
- No consumption of carbon dioxide
- Measures carbon dioxide in liquids
Applications
Scientific: Carbon Dioxide Monitoring for Biological Applications
Increased CO2 uptake from the atmosphere caused by anthropogenic sources is believed to cause ocean acidification, with not yet foreseeable effects on marine life and ecosystem. Monitoring pCO2 in experimental set-ups simulating future levels of carbon dioxide can help to gain knowledge on the effects of ocean acidification on marine fauna. Besides the marine application, monitoring pCO2 also allows knowledge to be gained on land-based plant physiology. Monitoring pCO2 helps increasing yield during aquaculture of fish (fish farming) by providing convenient growth conditions. Excess carbon dioxide levels need to be monitored as this leads to hyperventilation of sea animals.
Technical
| Specifications* | |
|---|---|
| *provided pCO2 spots are used without futher handling in physiological solutions **after multipoint calibration ***in a carbon dioxide incubator with 100 % rel. Hum. at 5 % CO2; measurement interval of 1 min | |
| Measurement range | 1 - 25 % CO2 at atmospheric pressure (1013.15 hPa) |
| Resolution at 20 °C | ± 0.06 % at 2 % CO2 ± 0.15 % at 6 % CO2 ± 0.5 mmHg at 15 mmHg pCO2 ± 1.2 mmHg at 45 mmHg pCO2 |
| Accuracy** | ± 5 % of reading or 0.2 % (1.5 mmHg); whichever is higher |
| Drift at 37 °C*** | Typically < 5 % of reading per week |
| Measurement temperature range | From + 15 °C to + 45 °C |
| Response time (t90) at 20 °C | < 3 min. for change from 2 % to 5 % (15 mmHg - 38 mmHg) pCO2 |
Properties | |
| Compatibility | Aqueous solutions, pH 4 - 9 |
| Cross-sensitivity | Optical pCO2 sensors display reduced cross-sensitivity to ionic strength (salinity); acetic acid, SO2, HCl vapours |
| Stability | pCO2 sensors do not stand: organic solvents, pH above 10 or below 4 |
| Cleaning procedure | Depends on the sensor type used - please ask our experts |
| Calibration | pCO2 spots are pre-calibrated; re-calibration is possible Beta-irradiated or autoclavable pCO2 sensors available |
Storate | 12 months provided the pCO2 sensor is stored in its original package |
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FAQs
Can I measure CO2 also in a gas phase or only in liquid phase?
Do I measure CO2 or HCO3-?
Does the pH of the sample affect my CO2 sensor reading?
How do I import data into excel from a text file containing measurement data?
What happens if the temperature changes while measuring CO2?
What is the operating principle of the CO2 sensor?
What is the time of delivery?
Which substances can interfere with the optical O2, pH and CO2 measurements?