CastAway TM - CTD

CastAway TM - CTD – Depth profiling and analysis software

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This measurement device is used in research, coastal oceanography, hydrology and aquaculture / fisheries. ecoTech clients examine issues such as saltwater intrusion, speed-of-sound profile, estuary research etc.

  • Easy to handle
  • Bluetooth and GPS technology (coordinates, date and time)
  • GPS coordinates, date and time
  • Waterproof interface (below and above water)
  • Wireless Bluetooth communication
  • Fast response time of the sensor
  • No tools, computer or cable needed
  • No calibration required
Cast Away  
Measurement memory: 15 MB (typically > 750 Profile)
Power supply: 2 AA Alkaline batteries, ca. 40 h
operation time
Operating temperature: -5°C...45°C
Weight: 0,45 kg
Maximum depth: 0...100 water depth
Parameter Measuring range Resolution Accuracy Value
Conductivity: 0 bis 100000 μS/cm 1 μS/cm ± 0,25% ± 5 μS/cm measured
Temperature: -5 °C...45 °C 0,01 °C ± 0,05 °C 0,01 °C ± 0,05 °C measured
Pressure: 0...10 bar 0,001bar ±0,25 % of measuring range measured
Salinity: up to 42 (PSS-78) 0,01 (PSS-78) ± 0,1 (PSS-78) PSS-78***
Speed of Sound: 1400...1730 m/s 0,01 m/s ± 0,15 m/s Chen- Millero****
Density*: 990...1035 kg/m³ 0,004 kg/m³ ± 0,02 kg/m³ EOS80*****
Depth: 0...100 m 0,01 m ±0,25 % of measuring range EOS80*****
Specific Conductivity**: 0...250000 μS/cm 1 μS/cm ± 0,25 % ± 5 μS/cm EOS80*****
GPS: 10 m      

 

* Based on resolution and accuracy of temperature measurement
** in relation to 100,000 s / cm at-5°C
*** 1978 Practical Salinity Scale
**** Chen-Millero, 1977. Speed-of-sound in sea water at high pressures
***** International Equation of State for sea water (EOS-80)

Frequently asked questions about "Water quality":

You send us your defective unit together with our repair form and we take care of everything else. If a replacement is necessary, we can, in individual cases, already send a replacement unit after testing (subject to availability). Repairs are carried out by us or by the manufacturer. We endeavour to carry out as many repairs as possible in-house in order to keep repair times as short as possible.

Windows10 compatible operating software is available for all current and most older YSI units.

Virtually all YSI measuring instruments are serviced and repaired in our own workshop, which reduces costs and shortens repair times. Measuring instruments from other manufacturers usually have to be sent in.

Mass development of cyanobacteria can severely reduce water quality and significantly limit water use. They produce a variety of secondary metabolites that act as allelochemicals, antibiotics, hormones and toxins and can harm fish and zooplankton, for example. Some of the toxins are among the strongest natural poisons and can also be hazardous to human health. For example, bathers can develop allergic skin reactions and also inflammations. If one swallows water containing cyanobacteria, there can also be stomach and intestinal infections.

Source:
https://en.wikipedia.org/wiki/Cyanobacteria

Nowadays, the turbidity of a liquid is still determined optically, but measured by means of electronic evaluation. The wavelength of the measuring radiation is usually in the infrared range at 860 nm (according to ISO 7027).  As a rule, a distinction is made between two measuring methods:   The attenuation of the transmitted light radiation (transmitted light), best suited for the detection of larger turbidities. The lateral scattering of the light radiation (scattered light), best suited for the detection of small turbidities.

Source:

https://en.wikipedia.org/wiki/Turbidity

 

Yes, a winch controlled via the depth position of the multi-parameter probe can record the water quality parameters at different depths at selected time intervals. In this way, diurnal variations in stratification can be measured, recorded and made available via remote data transmission.

In principle, yes, it is possible to test a loan unit for one week without obligation (subject to availability). We will be happy to demonstrate the device at your premises or send it to you free of charge.

please contact us at hydro@ecotech.de for more information