MRU Instruments – High End Emission Monitoring Systems Feel confident that you can properly monitor the emissions in industrial settings with selections from MRU Instruments. Our business is proud to offer high-end emission monitoring systems for your needs, including handheld gas analyzers and stationary emission analyzers. MRU caters to a wide array of businesses, offering our gas analyzer technology and other instruments to people working in the steel, cement, and glass industry, as well as breweries, power plants, boiler manufacturers, and refineries.