pCO²
The pCO2 sensor provides very precise autonomous measurements based on a spectrophotometry approach regarding the pCO2 concentration. The sensor can be integrated on CARIOCA and PIRATA buoys with the aim to measure CO2 partial at the sea surface of ocean and also determine the AIR-SEA CO2 fluxes in open ocean.
Autonomous measurement based on spectrophotometry
High accuracy & Low drift
Optional datalogger mode with satellite transmission
Compact & Robust design
One year operating autonomy
Datasheet
Features and benefits
The CO2 content in the atmosphere is one of the elements responsible for the greenhouse effect. The evolution of its concentration has great consequences on the climate of our planet. It is recognized that the fact that the ocean supplies and drawns in turn CO2 is one of the major elements of the atmosphere evolution. Considering the variability of dissolved CO2 in space and time at the surface of the ocean, an experimental approach aiming at making time series measurement from unattended platforms should be contemplated to complete measurements carried out from vessels in movement or from fixed buoys.
pCO2 sensor can be integrated on CARIOCA and PIRATA buoys with the aim to measure CO2 partial at the sea surface of ocean and also determine the AIR-SEA CO2 fluxes in open ocean.
Examples of use
CARIOCA Buoy: Assessment of the variability of ocean CO2 partial pressure and Air-Sea CO2 fluxes in ocean, integrating a SBE37 probe, a fluorometer (for measuring chlorophyll-a), an Ultrasonic anemometer (Wind-speed and Atmospheric pressure), a DO optode and Sea-Temperature.
PIRATA Buoy: Integrated on T-Flex buoys, able to measure pCO2 partial pressure, Dissolved Oxygen, Atmospheric pressure and seawater temperature.
Technical data
CO2 partial pressure:
Range 250 to 550µatm
Initial accuracy +- 3µatm
Temperature (Water circuit):
Range -2 to +32°C
Initial accuracy +-0.01°C
Operational depth: 1dbar
Dissolved Oxygen:
Range (O2 concentration/Air saturation) 0 to 500µM / 0 to 150%
Initial accuracy < 8 µM / <5%
Data output: RS485 Serial connection (MODBUS protocol)
Data storage: Yes
Sampling rate: 1 measure per hour
Power supply: 9 to 18 Vdc (12 Vdc nominal)
Power consumption: 29 mW (2.5mA@12Vdc)
Dimensions: length x diameter: 0.85m x 0.24m
Weight: 23 kg in air
Housing Material: anodized aluminium + anti-fouling paint
Connector SUBCONN MCDLSF 8-pin
