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1-1 INTRODUCTION
The SBE 19 SEACAT Profiler is designed to measure electrical conductivity, temperature, and pressure in
marine or fresh water environments to depths up to 10,500 meters. The standard SEACAT Profiler will
operate in two modes, profiling and moored. Profiling mode is designed for applications where vertical
profiles of the measured parameters are required. In profiling mode, the sample rate can be varied from
twice a second to once every 4 minutes in half-second increments. Moored mode provides a means of
acquiring time series measurements at sample rates of once every 15 seconds to once every 8 hours,
adjustable in one-second increments.
Self-powered (9 D-size alkaline batteries provide 26 hours operation in profiling mode) and self-contained,
the SBE 19 features the proven Sea-Bird conductivity and temperature sensors and a precision
semiconductor strain-gauge pressure transducer. The 1024K byte CMOS static RAM will record 24 hours
of conductivity, temperature, and pressure data while sampling at two scans per second (48, 96, or 192
hours with optional 2, 4, or 8 megabyte memories). Set-up, check-out, and data extraction are performed
without opening the housing. Simultaneous real time monitoring is possible using the SEACAT Profiler's
two wire RS-232C transmit capability. Sea-Bird's powerful SEASOFT CTD software derives salinity,
density, sound velocity, and other ocean parameters from stored CTD values and may be used for data
analysis, plotting, and archiving. External sensors may be powered and their frequency or voltage outputs
acquired by the SBE 19.
Standard SEACAT Profilers are supplied with 1024K byte memory, 600 meter capability plastic housings,
SBE 5M submersible pump for pumped conductivity, a second bulkhead connector wired for 4 single
ended auxiliary A/D inputs, and alkaline batteries.
SEACAT Profiler options include:
•aluminum or titanium housings for use to 3400, 6800, or 10500 meters
•2, 4, or 8 megabyte memories
•internal optical isolation and cable drivers for real time telemetry over cables up to 7000 meters long
•2 differential input, 4 auxiliary A/D channels
•sensors for dissolved oxygen, pH, fluorescence, light (PAR), light transmission, and turbidity
•SBE 5T submersible pump for use with dissolved oxygen and/or pumped fluorometer sensors
The SEACAT Profiler can be used with the SBE 32 Carousel Water Sampler and the SBE 33 Carousel Deck
Unit. The SBE 32 Carousel provides +15 VDC power to the SBE 19 and has ample power available for
auxiliary sensors not normally supported by battery-powered CTDs. The CTD data from the SEACAT
Profiler is converted into single wire telemetry for transmission over long (10,000 meter) seacables.
Bottles may be closed at any depth without interrupting CTD data via software control using the
SEASAVE program or from the front panel of the SBE 33 Deck Unit.
Also available for use with the SEACAT Profiler is the SBE 36 CTD Deck Unit and PN 90227 Power Data
Interface Module (PDIM). These items provide real time power and data handling capabilities over single
conductor seacables using the same method as employed in the SBE 32/SBE 33 Carousel Water Sampler.
The PDIM is a small pressure housing that is mounted on or near the CTD. It provides +15 VDC power to
the SEACAT Profiler and interfaces two way RS232 communications from the SEACAT Profiler to the
telemetry used on the seacable.
