PEQITOX 7 is an apparatus for the continuous preparation of test solutions, suspensions or emulsions from stock solutions of substances tested at the limit or above the solubility. It is constructed to be used in fish flow through tests. Since one unit produces 1 test concentration the concentration factors can freely be chosen depending on the requirements and the limitations of pumps selected for the feed of the stock solutions.

An electronic control panel controls the flow and the levels of liquid and triggers a local or remote alarm in case of malfunctioning and hence eliminates the risk of flooding the laboratory space with test solutions or undesired changes of test concentrations in the fish aquaria.