188431 ⎘
Ratio control; Controlling ratio of two or more flows of fluid or fluent material with auxiliary non-electric power by sensing concentration of mixture, e.g. measuring pH value
Sub-classes:PROCESS FOR CONTROLLING HYDROGEN SULFIDE AND AMMONIA FLOW RATES
#2PRESSURE COMPENSATED VENTURI DISPENSING SYSTEM
#3Pressure compensated Venturi dispensing system
#4PROCESS FOR CONTROLLING HYDROGEN SULFIDE AND AMMONIA FLOW RATES
#5Pressure compensated Venturi dispensing system
#6Method of using air and helium in low-pressure tube transportation systems
#7Pressure compensated Venturi dispensing system
#8Water-injected gas compressor and method for controlling the water supply
#9Water monitoring device and method