Proteus Water Quality Sensor

Proteus Water Quality Sensor

An award-winning multi-parameter, real-time sensor platform (portable or permanent) that accurately and reliably measures BOD, COD and faecal coliforms for permanent and temporary applications.

  • Description
  • Technical specifications

The Proteus is the world’s first scientifically proven real-time sensor for measuring BOD that can measure a wide range of applications. A multiprobe that measures your choice of parameter, all in one package, that can deliver
data in the toughest field conditions. The Proteus has been designed for its ease of use, reliable data and economical operation.


  • BOD
  • Dissolved Oxygen
  • Pressure
  • Chloride
  • pH
  • Temperature
  • Optical Brighteners
  • Nitrate
  • Faecal Coliforms
  • Tryptophan
  • Refined Oils
  • Ammonium
  • EC / Salinity / TDS
  • Turbidity
  • Crude Oils CDOM
  • COD
  • TOC
  • Internal Power Battery Life: 1 to 24 month depending on sensors / logging rates
  • Sample Rate: 1 Hz
  • External Power: 5-30 vdc
  • Data Memory: >1,000,000 logged readings
  • Operating Temperature: -5 to 50 °C
  • Logging Rates: 1 second to 1 day
  • Depth Rating: 200 m
  • Warranty: 2 years* * All sensors included except ISE’s (Ammonia/nitrate/chloride)
  • Communications: RS-232, SDI-12, USB or Bluetooth


  • Diameter: 75 mm (2.95”)
  • Length – w/o Battery Pack: 483 mm (19”)
  • Weight – with IBP: 2.3 kg (5.0 lbs)
  • Number of sensors: Up to 7
  • Battery Pack: 8 “C” cells


  • Diameter: 89 mm (3.5”)
  • Length – w/o Battery Pack: 483 mm (19”)
  • Weight – with IBP: 4.1 kg (9.0 lbs)
  • Number of sensors: Up to 11
  • Battery Pack: 8 “C” cells


  • Diameter: 102 mm (4.00”)
  • Length – w/o Battery Pack: 483 mm (19”)
  • Weight – with IBP: 4.5 kg (10.0 lbs)
  • Number of sensors: Up to 13
  • Battery Pack: 8 “C” cells


Ammonia (NH3): Ammonia is normally found in very low concentrations in natural waters. It is a result of
microbiological activity breaking down nitrogen-containing material. Elevated levels of ammonia can be very harmful to aquatic life and fish in particular.

Biochemical oxygen demand (BOD): Biochemical oxyegen demand is a measure of the amount of oxygen used by microorganisms (e.g.,aerobic bacteria) in the oxidation of organic matter. High levels of BOD (due to excess organic matter) indicate greater consumption of oxygen by microorganisms, meaning less is available to fish and other aquatic life.

Chemical Oxygen Demand (COD): Chemical Oxygen Demand (COD) measures the amount of oxygen required to chemically oxidize the organic material and inorganic nutrients, such as Ammonia or Nitrate, present in water. It is widely used as an indicator of organic pollution and many industrial and wastewater effluents have strict permits associated with COD concentration.

Conductivity: Conductivity is a measure of the ability of water to pass an electric current; it is affected by the
presence of dissolved solids such as chloride, nitrate and phosphate. Conductivity can be a very useful
indicator that a discharge of some sort has entered a stream, or some other change has occurred.

Dissolved oxygen: Oxygen is essential for the survival of aquatic life and is incorporated into surface waters by direct absorption from the atmosphere, more so in turbulent streams. It is then consumed by organisms and decaying organic matter. An excess of decaying organic matter leads to a shortage of oxygen, which can prove fatal for fish.

Faecal Coliforms: Coliforms (coliform bacteria) are rod-shaped gram-negative bacteria that are commonly used as an indicator of the sanitary quality of water Nitrate (NO3-): Nitrate is a naturally occurring by-product of the breakdown of organic waste. In low concentrations it stimulates the growth of aquatic plants. At higher concentrations it can be directly harmful and can also lead to excess algae growth and eutrophication. The primary source of excess nitrate is surface runoff from agricultural land.

pH: pH is related to the concentration of hydrogen ions in a solution and is a measure of acidity or alkalinity. In natural ecosystems it can vary from around 4.5, for acid peaty upland waters, to over 10.0 where there is intense photosynthetic activity.

Redox (ORP): Redox (Reductionoxidation) or ORP (Oxidation Reduction Potential) is a measure of the oxidising or reducing potential of a water body. Many important biochemical processes are oxidation or reduction reactions (e.g. ammonia>nitrite>nitrate). The ORP level in a river or treatment plant
will govern (along with DO and pH levels) which reactions are prevalent.

Temperature: Physical temperature of the watercourse. Largely dictated by climate, but also of interest around thermal discharges. Temperature extremes can be harmful to aquatic organisms, and also
have an effect on other parameters, e.g. pH and dissolved oxygen.

Turbidity: Turbidity is a measure of the clarity of water. Silts and soils that are suspended within rivers and lakes cause high levels of turbidity, especially during storm and run-off events.