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Full ocean depth water level, with extremely high resolution, accuracy, and stability. Precision thermometer, optional conductivity sensor.
The SBE 53 BPR measures full ocean depth water level with extremely high resolution, accuracy, and stability. It combines a uniquely precise and stable time base with low-power frequency-acquisition circuitry, Paroscientific Digiquartz® pressure transducer, non-volatile 32 MB FLASH memory, and a precision thermometer, to provide unprecedented bottom-pressure recording capability.
The BPR integrates pressure measurements to obtain water levels (tides) unaffected by wave action. The interval between each water level measurement is programmable (1 minute to 1 hour), and the integration duration is also programmable (1 minute to entire tide interval). The BPR can continuously power the pressure transducer and reference frequency oscillator, eliminating turn-on transients and providing the highest quality data. Alternatively, it can enter a power-down state between measurements to conserve battery power, with a user-specified warm-up period before each pressure measurement. Temperature data is recorded with each pressure integration. Logging start and stop times are programmable, allowing lab setup before deployment.
The BPR stores data in memory, and also outputs real-time data. The large memory and low power requirements permit frequent water level recording. An input connector for an optional SBE 4M conductivity sensor is standard.