#$%^&*AU2008201000B220140213.pdf#####Abstract A dosing mechanism for dosing a fluid flow in a conduit with an agent. The mechanism includes a bypass line for taking a selected portion of the fluid from the fluid flow conduit at a take off point and returning the selected portion to the fluid flow conduit at an injection point. The mechanism further includes an agent introducing means for introducing an agent to the fluid within the bypass line. An indicator means provides an indication of the quantity of agent in the introducing means.'/513 20Fk 1/ aL*e VJo+ 4 3o litII
