Reply To: Turbidity Sensor Information/Questions

Given the popularity, complexity, and expense of turbidity sensors, the team here at the Stroud Center has compiled a snapshot of some commercially-available options that may help people decide on the

Given the popularity, complexity, and expense of turbidity sensors, the team here at the Stroud Center has compiled a snapshot of some commercially-available options that may help people decide on the best option. This table likely excludes many vendors and models, and it only summarizes sensors that we have recently used or investigated. In addition to these commercially-available options, you might consider do-it-yourself options like OpenOBS, a well-document project on Github with a peer-reviewed background. Another open-source DIY turbidity sensor is described by Droujko and Molnar 2022 in Nature, Scientific Reports.

• Campbell Scientific Clari-Vue (recently replaced the OBS3)
  • no wiper
  • pre-calibrated
  • SDI-12 at 5V
  • 9.6-18V (nominally 12V)
  • compatible with Mayfly version 1.1 (or any Mayfly version with an interface board with separate 12V supply)
  • compatible with Modular Sensors
  • $$ on a scale of $ (<$1000), $$ ($1000 – $2000), and $$$ (>$2000)
• Yosemitech Y511-A
  • includes wiper (the Yosemitech Y510-B does not include a wiper)
  • pre-calibrated
  • Modbus over RS485
  • 5-12V (nominally 12V)
  • compatible with Mayfly version 1.1 with EnviroDIY RS485 adapter (or any Mayfly with both separate 12V power supply and RS485 adapter)
  • compatible with Modular Sensors library
  • $
• Turner Designs Turbidity Plus
  • available with and without wiper
  • not pre-calibrated
  • analog voltage communication
  • 3-15V
  • compatible with Mayfly version 1.1 with multi-purpose 6 pin screw terminal grove adapter (or any Mayfly with a voltage divider with separate 12V power supply)
  • not compatible with Modular Sensors library
  • $$
• Turner Designs Cyclops 7
  • no wiper, but has an optional cap to protect the sensor window
  • not pre-calibrated
  • analog voltage communication
  • 3-15V
  • compatible with any Mayfly version with multi-purpose 6 pin screw terminal grove adapter
  • compatible with Modular Sensors library
  • $$
• Analite NEP-5000
  • includes wiper
  • pre-calibrated
  • SDI-12 or Modbus over RS485 or analog communication
  • 8-30V
  • compatible with Mayfly version 1.1 (additional adapters required depending on communication protocol used)
  • not compatible with Modular Sensors library
  • $$$

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