Chromatographs are apparatus that measure the component mixture in gas or liquid mixtures. They can be used in natural gas calorific measurement, petrochemicals, pharmacology, chemical manufacturing, biochemistry, genetics, food and water refineries. 

Gas chromatography is a chromatographic technique that can be used to separate volatile organic compounds. A Gas Chromatograph is a chemical analysis instrument for separating chemicals in a complex sample. They measure/analyze the BTU’s (British Thermal Unit – a unit of energy) of natural gasses. It also accurately measures the proportion of multiple gas mixtures in organic compounds. Yamatake Gas Chromatographs are approved by BOTAŞ for custody transfer .