COMPACT-OPTODE is a small, precise data logger equipped with the optical
DO sensor developed by Aanderaa Data. It is suitable for long-term,
stable deployments. Oxygen is not consumed at the sensing surface, so
stirring of the water surrounding the surface is not required. The
measurement principle is based on dynamic fluorescence quenching which
makes the sensor less susceptible to bio-fouling than conventional
sensors. In addition, the sapphire sensing window of the COMPACT-OPTODE
is rated up to 6000m. Since there is no membrane or electrolytic
solution to change and moreover, since there is little drift, stable
data measurements can be obtained without frequent re-calibration.
Our state-of-the-art technology allows for a compact design capable of storing up to 172,800 sets of 3-channels of data (DO, temperature and voltage). The non-volatile flash-memory prevents data loss in case of power failure or irregular battery voltage.
The operation of the COMPACT-OPTODE is managed through a PC's RS232-C port. The main unit records calendar and time information with each sample and the sensors' calibration coefficients are stored in the built-in memory.
The basic measurement setup requires only the selection of the start time and the measurement parameters.
Data transfer after completion of deployment is easy. Since measurement start time and calibration coefficients are automatically transferred to the data acquisition software together with the measured data, it is not necessary to manually manipulate the data after download and data processing can be started immediately.
The data processing program offers clear and logical screens for easy operation.
|Main Unit Specifications|