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Biomonitoring using Daphnia (DaphTox II)

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Sensitive detection of toxic substances in water via computer-assisted digital image analysis
The bbe DaphTox II observes daphnids, commonly known as “water fleas”, under the influence of constantly running sample water. Based on the Extended Dynamic Daphnia Test, bbe developed a new sensitive method to detect hazardous compounds in water from rivers (source-water protection), plants, distribution systems and production drains to preserve human health and to monitor water.
Sensitivity data are available below.
Sample water (0.5 – 2 l/h) continuously runs through the measuring chamber containing the daphnia. The live images obtained using a CCD-camera are evaluated online with an integrated PC to analyse changes in the behaviour of the daphnia. If the change is statistically significant, an alarm is triggered. The method of image analysis enables a series of measurement methods and plausibility tests to assess the daphnia’s behaviour using different criteria.

  • Technical Data 
  • Applications
  • Brochure 
Measurands
  • average swim speed
  • speed distribution
  • swim height
  • average distance
  • fractal dimension of paths: curviness, turns
  • no. of daphnia
  • distribution in chamber
  • size of daphnia
Measurement procedure video image analysis
Housing material varnished steel plate
Weight 60 kg
Dimensions (H x W x D) 800 x 800 x 500 m
Protection class IP54
Mains supply 110/240V 50/60Hz
Power consumption 600 W
Temperature Sample: 0 – 30 °C / Environment: 0 – 35° C
Transmission suitable for max. 100 FTU
Sample volume 30 ml
Maintenance interval > 7 days
Sample inflow free inflow/tube pump
Hardware integrated touchscreen PC, Windows XP Prof. splash-proof, flexible USB keyboard
Outputs
  • modem
  • LAN
  • analogue output 4-20 mA (2 X) (optional)
  • relay output (2 X)
  • RS232
  • USB

 

 

Surface water applications

Surface water applications

  • dam monitoring
  • waterway analysis and assessment
  • general environmental monitoring

Drinking water applications

Drinking water applications

  • intake assessment
  • drinking water supply

Research applications

Research applications

  • risk analysis
  • limnological work
  • research and education

 

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