Toximeter for Drinking Water and Surface Water


Features & Benefits

  • Measurement range: 0-100% Toxicity
  • Response time: 5-10 minutes (application dependent)
  • Continuous monitoring of toxicity
  • Self-regenerating bacteria within toxicity analyzer
  • High reproducability
  • Low operational costs
  • Low maintenance
  • No purchase of test organisms necessary
  • According to DIN EN ISO 9509:2006
Toxicity Analyser ToxAlarm

LAR's toxicity analyzer is suitable for environmental protection for a variety of types of water:

Using analyzer options, the measurement system is adaptable for every measurement challenge.

For safe operation in hazardous areas, there are different protection housings available:

  • IP54 (Standard)
  • IP 65 (NEMA 4X)
  • ATEX Zone I
  • ATEX Zone II

Online Toximeter for Drinking Water and Surface Water Monitoring.

LAR's toxicity analyzer ToxAlarm continually monitors drinking and surface water 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 even after events of toxicity.

The bacteria are self-reproducing. In this case a huge advantage.

ToxAlarm contains a bacteria culture, which constantly and independently produces Biomass. This means that there is always enough bacteria for each new measurement. Furthermore, the risk of the fermenter being contaminated is removed because every water sample is tested with a fresh amount of bacteria.

Robust toxicity analyzer. Sensitive test organisms.

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, a reaction already starts at a cyanide concentration of less than 0.10 mg/litre.

Reduced maintenance. No further purchases necessary.

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.

The nitrification respiration inhibition test. Simpler than its name.

The bacteria live on (consume) oxygen from the conversion of ammonia to nitrate, which is why they are described as nitrifiers. ToxAlarm measures this oxygen consumption. Toxic substances in the sample contents inhibit the respiration of the bacteria, thus lowering their oxygen consumption. The ToxAlarm monitors this oxygen consumption and hence the toxicity.

BOD / Toxicity

The BOD indicates the amount of oxygen which is needed for the biological degradation of organic substances in water.

Toxicity is described as the direct harmful effect of a substance on organsims.

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Related News

The analyzer ToxAlarm is a measuring system for online toxicity monitoring as well as for laboratory use in drinking and surface water applications.


The toximeter NitriTox of LAR Process Analysers AG is a continuous operating analyzer for the determination of nitrification toxicity.


Toxicity is the most common disturbance to biological treatment processes – especially for nitrification. The continuous toxicity monitoring proactively protects the waste water treatment plant and hence, secures to keep the plant running.