Abstract: A method and apparatus for delivery of a plurality of input fluids, at least two of which are liquids, in a foam delivery system, including a fluid controller having: a delivery mechanism for each fluid, at least one test parameter transducer for each fluid configured to measure a test parameter associated with each fluid, and a control system configured to receive the output of each test parameter transducer and to issue a termination signal configured to stop each of the delivery mechanisms if the measured parameter deviates from a preset range of values.