The EnCal 3000 Biogas is a gas chromatograph, which was developed specifically for the custody transfer of energy measurement of treated biogas feed-in systems. It uses chromatograph components, which are based on the latest MEMS technology (Micro-Electro-Mechanical-Systems) and capillary columns. This results in highly accurate and reproducible analysis. The compact analyser includes an analysis of hardware, the gas sample lines, the route selection and all the electronics required for the stand-alone operation.