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A water quality meter that measures chlorophyll a concentration and phytoplankton volume

Abnormal increases in the numbers of diatoms can have an extremely significant impact on the water quality of reservoirs and rivers. This device uses fluorophotometry (the substitution method) to rapidly determine the concentration of chlorophyll a in the water. This immersion-type meter can be used to perform monitoring of water quality along the vertical axis (depth). The optional circulation pump can be used to perform measurement in stilling basins. It can also be combined with a water sampling pump to perform measurement from on-shore stations.

  • It can perform measurement over a wide measurement range, from low to high concentrations. It contains a wiper to remove all detritus each time measurement is performed, providing stable data.
  • Monitoring fluorescence makes it possible to perform well-timed aeration facility operation and highly efficient water intake by intake facilities.

Measurement Accuracy

Range 0~200μg/l
Accuracy ±5% F.S ※1
Method Spectrophotometric method(Cyan LED)※2
  • ※1 This indicates the accuracy when using uranine standard solution calibration. Accuracy in comparison to the official method of analysis varies on the amount of deviation, etc., from the calibration curve.
  • ※2 Converting fluorescence amounts into chlorophyll a amounts requires a calibration curve set in comparison to the official method of analysis.
  • The above specification values are reference values, and are subject to change without prior notice.

Example of raising/lowering usage

Vertical fluorescence is measured using automatic lifting and lowering.

Sensor block with chlorophyll-a meter and multiple sensors

Example of water sampling usage

Water is sampled using a water sampling pump, filling a water tank with sample water on which measurement is performed.