GAS MEASUREMENT SYSTEM. (IRIDIUM AUTOMOTIVES MEASURING SYSTEM). TO PROVIDE THE COMPONENTS TO MEASURE 3, 4 OR 5 GASES IN AUTOMOTIVE EMISSIONS. THIS IS ACHIEVED THROUGH A MIX OF INFRARED AND ELECTROMECHANICAL SENSORS. THE INFRARED SENSOR (KNOWN IN THE INDUSTRY AS A BENCH) MEASURES THE CONCENTRATION OF CARBON DIOXIDE AND HYDROCARBONS WITHIN A GAS SAMPLE. THE CONCENTRATIONS OF OXYGEN AND NITRIC OXIDE ARE MEASURED USING ELECTROMECHANICAL SENSORS IF REQUIRED.

GIR1 TERMS OF HEADING 9026 INCLUDES INSTRUMENTS AND APPARATUS FOR MEASURING OR CHECKING THE FLOW, LEVEL, PRESSURE OR OTHER VARIABLES OF LIQUIDS OR GASES. GIR6 TERMS OF ONE DASH SUBHEADING 902680, OTHER INSTRUMENTS AND APPARATUS. CN CODE 90268080, OTHER THAN ELECTRONIC.