SonTek CastAway-CTD

The CastAway-CTD is a lightweight, easy to use instrument designed for quick and accurate conductivity, temperature, and depth profiles.

Features

  • Can be used for sensor verification, speed of sound profiles, thermocline profiling, and more
  • Sampling rate and sensor response of 5 Hz with 1m per second free fall design
  • Designed for CTD profiling down to 100m
Your Price $6,365.00
Usually ships in 3-5 days
SonTek
Free Lifetime Tech SupportFree Lifetime Tech Support
Free Ground ShippingFree Ground Shipping
ImagePart#Product DescriptionPriceStockOrder
SonTek CastAway-CTDCA-CTD CastAway-CTD conductivity, temperature & depth instrument
$6,365.00
Usually ships in 3-5 days
SonTek CastAway-CTD
CA-CTD
CastAway-CTD conductivity, temperature & depth instrument
Usually ships in 3-5 days
$6,365.00

The CastAway-CTD 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.

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

Each CastAway-CTD cast is referenced with both time and location using its built-in 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.

  • (1) CastAway-CTD with polyurethane jacket
  • (3) Magnetic stylus pens
  • (1) Bluetooth adapter
  • (2) Carabiners
  • (1) 15m casting line
  • (4) AA batteries
  • (1) Cleaning brush
  • (1) USB flash drive with CastAway Windows software and documentation
  • (1) Quick Start Guide
  • (1) Hard plastic storage/shipping case
Questions & Answers
Can the instrument record a single data point?

Yes, there is a way to take point measurements, which is outlined on page 14 of this guide.

How long is the battery life?

With continuous use, battery life is estimated at 40 hours.

How much internal memory do the CTDs have?

The CastAway-CTD has 15 MB internal memory, which translates to ~750 casts.

Please, mind that only logged in users can submit questions

In The News

Diatoms dominate Muskegon Lake in a cold and rainy year

Climate change-driven volatility is changing lakes at the base of their food webs. That’s one way to interpret new research that documented such a change in Muskegon Lake on the coast of Lake Michigan. Researchers found that, in one particularly rainy and cool year, normal phytoplankton diversity and patterns were cast aside. Instead, one group of algae dominated the entire year, offering a glimpse into the kinds of surprising changes that could happen in the future. “Phytoplankton are a very responsive group of organisms,” said Jasmine Mancuso, whose research detailing the change in the lake was published in October in Journal of Great Lakes Research .

Read More

In the Right Place All the Time: Greenhouse Gas Research and NTL-LTER

While researchers all over the globe have been studying greenhouse gases, there are still some areas in the field that have not received as much attention as they deserve. Emily Stanley, professor in the department of integrative biology at the University of Wisconsin and principal investigator for North Temperate Lakes Long Term Ecological Research (NTL-LTER), has spent a significant part of her career exploring a few of them. “Clearly we have a problem with greenhouse gases. What people may not realize is that streams and lakes are hotspots of global methane and CO2. Understanding greenhouse gas dynamics in these systems is important because they are vents all over the world and they are not insignificant,” said Stanley.

Read More

Tides and microbes transform nitrogen where streams and the ocean meet

Enormous amounts of excess nitrogen hit water bodies all over the globe, including the U.S., due to runoff from agricultural and other human activities. This nitrogen can cause dead zones and harmful algal growth. Before it reaches the ocean, microbes can process and remove some of it from stream sediments, connected aquifers and tidal freshwater zones.  Thanks to this process, coasts can have a decreased likelihood of harmful algal blooms.  Keeping coastal waters clean is important for many reasons, including the fact that about 60% of the U.S. population lives on coasts. But despite the importance of these nitrogen processes, researchers have not fully investigated how they work.

Read More