CastAway™ CTD

The CastAway is a perfect tool for lakes restoration and profiling with a 5Hrz sample rate

The YSI CastAway™ CTD is the world’s first handheld cast-able instrument that provides instantaneous profiles of temperature, salinity, and sound speed. Oceanographers, hydrologists, and surveyors now have the ability to quickly collect reliable data from any dock, bridge, or boat.


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Field Ready and Rugged
The CastAway CTD is a hand deployable conductivity, temperature, and depth instrument for hydrologic profiling. An integrated LCD screen displays an intuitive user interface for deployment and immediate review of collected data including both statistics and profile plots. The watertight, compact design features a tough rubber jacket for additional durability in harsh conditions. The system utilises BlueTooth wireless communication, so no field cables or connectors are needed. Two AA batteries power the CTD for several days at a time and are easily replaceable without the use of any tools. This handheld device is an affordable, rugged, and portable instrument that simplifies any water profiling application.

With three taps of a magnetic stylus pen, simply drop the CastAway in the water, pull-it up, and have conductivity, temperature, and depth measured in minutes. An attractive LCD screen provides easy access for set-up, deployment, and immediate data review. Integrated GPS virtually eliminates the need for field notes. The beginning and end of every cast is logged to the internal recorder with position and time.

CTD Profiling and Analysis Software
Reviewing and analysing CTD profiling data has never been easier. The included GIS software quickly downloads data from each of your CastAway CTD’s automatically over BlueTooth to show the location of each cast on an interactive map. Customize your CTD data, GPS information, and plot comparisons all in one place. Analysis, plotting, editing, and exporting of data are quick and easy tasks.

• GPS position, date, and time
• Fast sampling and sensor response
• Waterproof interface works in and out of the water
• Bluetooth wireless communication
• No user calibration needed
• No tools, computers, or cables required

Conductivity: 0 – 100,000 µS/cm
Resolution: 1 µS/cm
Accuracy: 0.25% ±5 µS/cm

Pressure: 0 to 100 dBar
Resolution: 0.01 dBar
Accuracy: 0.25% of FS

Salinity: 0 to 50 ppt
Resolution: 0.01 ppt
Accuracy: 0.1 ppt

Sound Speed: 1400 to 1600 m/s
Resolution: 0.01 m/s
Accuracy: 0.15 m/s

Temperature: -5 to +45°C
Resolution: 0.01°C
Accuracy: ±0.05°C

Communications Internal BlueTooth Radio (Class 2); Up to 10m range
Diameter 2.8 in, 7.11 cm
Height 8.0 in, 20.32 cm
Weight 1.0 lbs, 0.45 kg

GPS 10m accuracy; Acquisition time 1 min. from cold start
Power 2 Standard AA batteries for 40+ hours of operation
Recorder 15 MB recorder;
Good for 750+ casts during typical use
Sample Rate 5Hz

Key Applications
Best used in:
• Coastal Oceanography
• Hydrology
• Surveying/Hydrography
• Aquaculture/Fisheries

When needed for:
• Saltwater Intrusion
• Sound Velocity Profiles
• Field Sensor Verification
• Coastal Research

Ordering Information:
YSI CastAway


Weight 5 kg
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