Reliable Toximeter for Monitoring Toxicity Levels

Our LAR™ NitriTox™ toximeter analyzer continually monitors wastewater treatment plants for pollutants. Potential toxins in water are determined through the reaction of highly sensitive bacteria. The measurements follow at intervals of less than 5 minutes. Thus, allowing enough time to introduce countermeasures after the occurrence of pollution. The NitriTox offers three warning levels, which can be individually set.

NitriTox contains a bacteria culture (nitrifiers), which constantly and independently produces biomass. This means that there is enough bacteria at all times for each new measurement. As every water sample is tested with a fresh number of bacteria, the risk of the fermenter being contaminated is removed. The bacteria are extremely sensitive to a multitude of toxins. Through their reaction to the harmful substances in the water sample, toxicity can be reliably determined. For example, with phenols a reaction already starts at a concentration of less than 0.10 mg/liter.

Our NitriTox toximeter analyzer is a specialized instrument used to monitor the toxicity of wastewater and other environmental samples. The instrument is based on bioluminescent bacteria and measures the level of toxicity by detecting changes in the luminescence of the bacteria in response to toxic substances.  

The NitriTox toximeter analyzer is commonly used in these applications:

  • Wastewater Treatment Plants: Used to monitor the toxicity of effluent from wastewater treatment plants to ensure that it meets environmental regulations and is safe for discharge into the environment.
  1. Industrial Applications: Used in various industries, such as chemical manufacturing, pulp and paper, and food processing, to monitor the toxicity of their wastewater discharge and ensure compliance with environmental regulations.

  2. Environmental Monitoring: Used for environmental monitoring, such as monitoring the toxicity of surface water, groundwater, and soil samples. It can help identify areas of environmental contamination and evaluate the effectiveness of remediation efforts.

  3. Research and Development: Used in research and development applications to evaluate the toxicity of various substances and to study the effects of toxic substances on living organisms.

features & benefits

  • Measurement range: 0 – 100% Toxicity
  • Fast Response Time: 5 – 10 minutes (depending on application)
  • Toxicity monitoring
  • Self-regenerating culture of nitrifying bacteria
  • Highly sensitive
  • No memory effects
  • Low operational cost
  • High reproducibility
  • No purchase of test organisms required
  • According to DIN EN ISO 9509:2006


  • Flow Sampler


    • IP54 (Standard)


    • Water influent
    • Industrial wastewater
    • Environmental protection
    • Wastewater treatment plant monitoring
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      Process Insights_LAR_Toximeter NitriTox

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      The NitriTox instrument is based on bioluminescent bacteria and measures the level of toxicity by detecting changes in the luminescence of the bacteria in response to toxic substances.

      It contains a sample chamber where a small amount of bioluminescent bacteria is added to the water sample being tested. The bacteria used in it are typically a strain of Vibrio fischeri, which produces light when it is exposed to certain toxic substances.

      Once the bacteria are added to the water sample, the NitriTox measures the luminescence of the bacteria using a photomultiplier tube. The photomultiplier tube detects the light emitted by the bacteria and converts it into an electrical signal that is then measured by the instrument.

      If the water sample contains toxic substances, the luminescence of the bacteria will be reduced, indicating the presence of toxicity. The NitriTox then calculates a toxicity score based on the level of luminescence measured, which can be used to evaluate the toxicity of the water sample.


      Firstly, it is not necessary to purchase or externally cultivate test organisms, such as fish or daphnia. Secondly, the toxicity analyzer is extremely low in maintenance because the bacteria mass constantly proliferates on its own.

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