Laminar flow controllers use a proportional valve coupled to a flowmeter body. Measurements are taken within the laminar region of the flow meter and the integral PID controller positions the valve to maintain the user programmed set points. The controllers offer single or dual output signals of the same or different voltages and/or different parameters such as mass flow and temperature or flow and pressure. These robust, closed-loop devices can accept and transmit 0-5Vdc, 0-10Vdc, 4-20mA control signals. The flow controllers include a dynamic digital display that simultaneously shows all the process parameters being measured by the meter plus a push button operator interface for set point adjustments and gas select.