Part Number: 0038900

Detect harmful algae blooms sooner with the only chlorophyll sensor designed for maximum stability at low detection limits. The Chlorophyll a sensor uses In-Situ’s patented Integrated Optical Compensation technology to reduce drift and improve accuracy of algae concentration measurements. Unlike total algae sensors, our sensors measure chlorophyll and blue-green algae separately to reduce interference for more reliable data. This sensor measures chlorophyll a and is compatible with the Aqua TROLL 500 or Aqua TROLL 600 multiprobes, which feature wireless data collection via mobile app.

  • Measurement range: 0-100 RFU, 0-1000μg/L
  • Linearity: R2>0.999 for serial dilutions of Chl a in MeOH across full range
  • Resolution: 0.001 RFU or 0.01 μg/L
  • Integrated Optical Compensation: In-Situ’s patented technology uses a second detector to compensate for LED drift over temperature and time, providing more accurate, stable measurements.
  • Ambient Light Rejection: External light can introduce bias in your data, but our fluorometers block external light for reliable performance in any setting.
  • Low Interference Spectral Bands: Combined chlorophyll and BGA sensors measure wide ranges of the visible spectrum. Our individual BGA sensors detect smaller ranges to reduce environmental interference.
  • Isolated Optical Frequencies: Using two or more sensors simultaneously typically creates interference among sensors. Our sensors use separate frequencies, providing a unique digital signature for each light source to minimize interference and improve accuracy.
  • More accurate, reliable data: Improved stability and minimized interference means overall better data.
  • Less maintenance: Internal diagnostics, lower calibration solution volume and one- or two-point calibration means you spend less time on maintenance.
  • Reduced monitoring costs: Install only the sensors you need, so you don’t have to buy what you won’t use.
  • Ease of use: Sensors retain calibration data so you can use them in any sonde.
  • Versatile applications: Use the sensor with river or lake monitoring as well as coastal studies.


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