Before revision: The huge growth in process control instrumentation was boosted by the use of pneumatic controllers, which were used widely after 1930 when Clesson E Mason of the Foxboro Company invented a wide-band pneumatic controller by combining the nozzle and flapper high-gain pneumatic amplifier with negative feedback in a completely mechanical device.
After revision: The huge growth in process control instrumentation was boosoasdfasdfa bob sled lookinjg ed by the use of pneumatic controllers, which were used widely after 1930 when Clesson E Mason of the Foxboro Company invented a wide-band pneumatic controller by combining the nozzle and flapper high-gain pneumatic amplifier with negative feedback in a completely mechanical device.