An evolution of the miniCTD, the fastCTDplus multi-parameter profiler is designed to deliver the highest quality CTD and Phycocyanin observations at fast drop rates.
A conductivity cell designed for optimum flow-through, a fast-response thermistor temperature sensor and 0.01% pressure sensor together with a Fluorometer sensor, all synchronously sampling at up to 32Hz to deliver the highest quality profiles in a lightweight and robust package.
Cyanobacteria (or blue-green algae) are photosynthetic bacteria that occur naturally in surface waters. Under certain conditions of light, temperature and nutrient levels Cyanobacteria can multiply rapidly, forming a bloom.
Some Cyanobacteria produce toxins which pose health risks for humans and animals. The EU Bathing Waters Directive therefore requires monitoring for these blue-green algae blooms. Testing actual toxins is possible by means of laboratory analysis of water samples, but this can be costly and time-consuming.
However, Cyanobacteria contain fluorescent pigment called Phycocyanin, which can be detected in real time using a Valeport Hyperion fluorometer. The Hyperion uses narrow bandpass filters on both excitation and emission wavelength to ensure that the response is specific to Phycocyanin and not affected by false positive results from normal Chlorophyll a fluorescence.
*Calibrated against Fluorescein/Rhodamine solution
0-9,000µg/l 2 gain settings: 0-25, 0-9000 software controlled
Minimum Detection (3x SD in RO water)
0.03 - 2 sec
0.5Hz to 32Hz (free running) software controlled
-5 °C - +35 °C
10, 20, 30, 50, 100, 200, 300, 400 & 600 bar
0.001% full scale
±0.01% full scale
1 x D Cell 1.5V Alkaline or 3.6V Lithium
if fitted with a connector 9-28V DC isolated
SubConn MCBH10F (if fitted)
Regular and synchronous data collection from all sensors up to 32Hz
Data is logged as the instrument descends (or rises), by a user defined pressure difference, through the water column
Once the instrument is set to run mode no data is logged until a programmed trigger depth is reached (e.g. 2 meters below the surface). Completely programmable, the device can be set to record down casts data only, for example, when the probe stops descending and rises by a defined amount logging is stopped
The instrument is designed to operate autonomously. Setup and data extraction can be performed using a SubConn connector or via an optional Bluetooth connection with a PC. Multiple profiles can be recorded in the instrument by switching it on then off using the connector switch plug or magnetic switch key for Bluetooth operation. Bluetooth auto-pairing and discovery make connecting to the instrument simple and robust. The instrument can also operate in real time or cabled comms. Supplied with a traditional SubConn connector with a choice of communication protocols fitted as standard and selected by pin choice on the output connector:
Up to 200m of cable
38400 - 460800
8 data bits, 1 stop bit, no parity, no flow control
Solid state non-volatile Flash memory
> 10 million lines of data (equivalent to 5,000 profiles to 1,000m wih a 1m profile resolution)
ø54mm x 510mm
Weight in air
2.6kg / 4.9kg including frame
Weight in water
Supplied with DataLog X2 Windows based software, for instrument setup, control, data extraction and display.
fastCTDplus Phycocyanin Profiler 6000m with connector
fastCTDplus Phycocyanin Profiler 2000m with Bluetooth
XX - Pressure sensor options 10, 20, 30, 50, 100, 200, 300, 400 & 600 Bar