Water Quality System (WQS)
Field & Laboratory Meters
  • pH, SCT, DO & BOD, Multi-parameter Testing
Environmental Monitoring Systems (EMS)
Multi-parameter Water Quality Sondes
  • Sampling, Logging& Profiling

Integrated Systems & Services (ISS)
Environmental Monitoring Modules
  • Buoy& Floating Platforms, Profiling Systems, EcoMapper AUV

EMS_6 Series and EXO Water Quality Sondes

PAR Sensor


PAR Sensor
Photosynthetically Active Radiation sensors

Detect radiation in the 400-700 nm waveband with standard and scalar LI-COR® PAR sensors configured for YSI 6-Series sondes.

PAR irradiance includes in vivo absorption bandwidths of:
-chlorophyll a, b, and c,
-the pigments contained within the cytoplasm of blue-green algae (cyanobacteria), and
-the chloroplasts of plants (including phytoplankton) that capture light energy for photosynthesis.

These sensors are available for use on the following sondes:

  • 6600 V2-2
  • 6600EDS V2

Wiping systems for sensors are available.

PAR Specifications
Absolute Calibration: ±5%
Sensitivity: Typically 3uA per 1,000 umol s-1 m-2 in water
Linearity: Maximum deviation of 1%
Stability: <±2% change over 1 year
Response Time: 10 us

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