In-Situ - Aqua TROLL Aqua TROLL Chlorophyll a Sensor  (P/N: 0038900) - OVERVIEW

Manufactured by:  In-Situ

This sensor measures chlorophyll a and is compatible with Aqua TROLL 500 and Aqua Troll 600:

  • 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.