A picture is worth a thousand words!

Do you have photos you would like to share with your colleagues in the water monitoring field?

 

Share your stories, photos or videos with SonTek today!

 

SonTek - a xylem brand | Sound Principles. Good Advice.
Login | Register
Loading
Measure conductivity, temperature and depth with the CastAway-CTD

CastAway-CTD

Measure conductivity, salinity and depth

Designed for coastal profiling, the CastAway-CTD® incorporates a 6-electrode conductivity cell, coupled with a fast response thermistor to provide highly accurate, high resolution CTD measurements to depths of 100 m.

 

Download Brochure

Schedule a FREE demo!

Primary Applications

 

 

CastAway Overview [PDF]

  • Salinity Accuracy: 0.1 PSU
  • Temperature Accuracy: 0.05oC
  • Small size
  • Integrated GPS position
  • Real-time display screen
  • Wireless data transfer
  • 5 Hz response time
  • 5 Hz sampling rate

Field Ready and Rugged

The CastAway-CTD The CastAway is a small, rugged and technically advanced CTD designed for profiling to depths of up to 100m. The system incorporates modern technical features which allow it to achieve a 5 Hz response time, fine spatial resolution and high accuracy. It uses a six electrode flow-through conductivity cell with zero external field coupled with a rapid response thermistor to attain high measurement accuracies. The instrument is simple to deploy, does not require a pump and is hydrodynamically designed to free fall rate of 1 m/s.

The integrated real-time data display screen, internal GPS sensor and automated wireless data transfer are unique features that simplify data collection.

Range Resolution Accuracy Method
Conductivity 0 to 100,000 µS/cm 1 µS/cm 0.25% ±5 µS/cm Measured
Density• 990 to 1035 kg/m3 0.04 kg.m3 ± 0.02 kg/m3 EOS80••
Depth 0 to 100 m 0.01 m ±0.25% FS EOS80••
GPS 10m
Pressure 0 to 100 dBar 0.01 dBar 0.25% of FS Measured
Salinity Up to 42 0.01 ±0.1 PSS-78†
Sound Speed 1400 –1730 m/s 0.01 m/s ±0.15 m/s Chen-Millero‡
Specific Conductivity§ 0 to 250,000 µS/cm 1 µS/cm 0.25% ±5 µS/cm EOS80••
Temperature -5 to +45°C 0.01°C ±0.05°C Measured
•Based on temperature resolution and accuracy. | ••International Equation of State for sea water (EOS-80). | †1978 Practical Salinity Scale | ‡ Chen-Millero, 1977. Speed-of-sound in sea water at high pressures. | § Based on 100,000 µS/cm at -5°C.
Communications Internal BlueTooth Radio (Class 2); Up to 10m range
Dimensions Diameter
Height
Weight		 2.8 in, 7.11 cm
8.0 in, 20.32 cm
1.0 lbs, 0.45 kg
Power 2 Standard AA batteries for 40+ hours of operation
Recorder 15 MB recorder; Good for 750+ casts during typical use
Sample Rate 5Hz

 

 

 

 

Each CastAway-CTD cast is referenced with both time and location using its builtin GPS receiver. Latitude and longitude are acquired both before and after each profile. Plots of conductivity, temperature,salinity and sound speed versus depth can be viewed immediately on the CastAway’s integrated color LCD screen in the field.  Raw data can be easily downloaded via Bluetooth to a Windows computer for detailed analysis and /or export at any time.

Form Object
CastAway CTD - What's in the Box?

Chris Heyer walks you through what you can expect to see once you recieve your new CastAway-CTD.

Customer Solutions

Catlin Arctic Survey
Marine Resources Center - Haiti

Solutions Showcase

Simple. Sleek. Superior.

Each Castaway kit includes:

CastAway Kit
Collect conductivity, salinity and depth data
Hydrology Oceanography Laboratory
10-MHz ADV 16-MHz MicroADV ADP/ADCP ADVOcean-Hydra Argonaut-ADV Argonaut-MD Argonaut-SL Argonaut-SW Argonaut-XR CastAway CTD CurrentSurveyor FlowTracker RiverSurveyor S5/M9 SonTek-IQ
Software Training Ask SonTek! Report a Problem Document Library
Timeline News Careers Community