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The TOXmini is a portable and easy to use system for toxicity measurements in a wide variety of samples and applications. It automatically measures the luminescent effect of the Vibrio fisheri and will give an indication when the tested sample is toxic. It can be used in the laboratory (also in combination with the optional cooling block) and as a field system running on the recharchable internal batteries. It is also an ideal solution to be used on conjunction with the TOXcontrol because it uses the same reagents (freeze dried bacteria, blank solution and positive control)