Model SBE 37-SIP MicroCAT C-T (P) -CTD Recorder

The SBE 37-SIP pumped MicroCAT is a high-accuracy conductivity and temperature (pressure optional) recorder with Serial interface (RS-232 or RS-485), memory, and integral Pump. Externally powered, it can be used for moored applications requiring fast sampling. The MicroCAT is useful as a stand-alone monitoring device and is easily integrated with other instrumentation platforms.

Data is output in real-time and can be recorded in memory; memory capacity exceeds 530,000 samples. Measured data and derived variables (salinity, sound velocity, depth, density) are output in engineering units.

FEATURES

• Moored Conductivity, Temperature, and Pressure (optional), with user-programmable sampling — 6-sec to 6-hour intervals, or continuous (0.9 sec/sample without pressure, 1.3 sec/sample with pressure).
• Integral pump.
• RS-232 or RS-485 interface.
• Internal memory, external power.
• Expendable anti-foulant devices, unique flow path, and pumping regimen for bio-fouling protection.
• 350 m plastic or 7000 m titanium housing.
• Seasoft© V2 Windows software package (setup, data upload, and data processing).
• Field-proven MicroCAT family, with more than 10,000 instruments deployed.
• Five-year limited warranty.

COMPONENTS

• Unique internal-field conductivity cell permits use of expendable anti-foulant devices, for long-term bio-fouling protection.
• Aged and pressure-protected thermistor has a long history of exceptional accuracy and stability.
• Optional strain-gauge pressure sensor with temperature compensation is available in eight ranges (maximum depth 7000 m).
• Pump runs for 1 second for each sample, providing improved conductivity response and bio-fouling protection.

OPTIONS

• Plastic (350 m) or titanium (7000 m) housing.
• RS-232 or RS-485 interface.
• No pressure, or strain-gauge pressure sensor in one of 8 ranges.
• XSG or wet-pluggable MCBH connector.
• No factory-supplied mount, wire mounting clamp and guide, or brackets for mounting to a flat surface.

Specifications

Measurement Range

Conductivity: 0 to 7 S/m (0 to 70 mS/cm)
Temperature: -5 to +45 °C
Optional Pressure: 0 to 20 / 100 / 350 / 600 / 1000 / 2000/ 3500 / 7000 m (meters of deployment depth capability)

Initial Accuracy

Conductivity: ± 0.0003 S/m (0.003 mS/cm)
Temperature: ± 0.002 °C (-5 to +35 °C); ± 0.01 (+35 to +45 °C)
Optional Pressure: ± 0.1% of full scale range

Typical Stability

Conductivity: 0.0003 S/m (0.003 mS/cm) per month
Temperature: 0.0002 °C per month
Optional Pressure: 0.05% of full scale range per year

Resolution

Conductivity: 0.00001 S/m (0.0001 mS/cm)
Temperature: 0.0001 °C
Optional Pressure: 0.002% of full scale range

Miscellaneous

Acquisition Time: 0.9 - 3.0 sec/sample (see manual)
External Power: 0.25 Amps at 9 - 24 VDC
Memory Capacity: 530,000 samples CTD
Housing, Depth Rating, & Weight: Plastic: 350 m
With pressure, without clamps - 2.3 kg in air, 1.4 kg in water
With pressure, with clamps - 2.5 kg in air, 1.6 kg in water
Titanium: 7000 m
Without pressure or clamps - 3.0 kg in air, 1.8 kg in water