Biomethane represents about 0.1% of natural gas demand today; however, an increasing number of government policies are supporting its injection into natural gas grids and for decarbonising transport. For example, Germany, Italy, the Netherlands and the United Kingdom have all introduced support for biomethane in transport. Today, Indane LPG is sold and delivered in six different pack sizes. The 5 kg and 14.2 kg cylinders are largely meant for domestic use and comprise almost half of all gas distributed, while the 19 kg, 47.5 kg and 425 kg Jumbo cylinders are marketed for industrial and commercial consumption. There are many types of Gas sensors but the MQ type gas sensors are commonly used and widely popular so will focus more on these types of sensors for this article. CNG Gas. MQ-5. Natural gas, LPG. MQ-6. LPG, butane. MQ-7. Carbon Monoxide. MQ-8. Hydrogen Gas. MQ-9. Carbon Monoxide, flammable gasses. MQ131. Ozone. MQ135. Air Quality. MQ136 2. Liquefied Gases - LPG, Liquefied Nitrous Oxide 3. Dissolved Gases - Acetylene . Cryogenic vapour could also be considered as a gas but is dealt with in a separate document. Refer to . In general, there are three types of gas cylinders: 1. High Pressure Cylinders - High pressure cylinders come in a variety of sizes, see Figure 1. Enter any fuel station and you'll see a whole range of different fuels, especially the premium offerings. You'll see regular unleaded, or 91-octane, premium unleaded 95, premium unleaded 98, E10 pN6p.

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