A semi-automatic filler is a machine used to fill containers, such as bottles or bags, with a specific volume of liquid or other product. Unlike a fully automatic filler, a semi-automatic filler requires some human intervention to operate.Typically, a semi-automatic filler will have a control panel where the operator can set the desired volume to be filled. The operator will then place the container to be filled underneath the filling nozzle or spout and activate the filling process.