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Welcome to our new and updated site. Browsing through the site you will find information on mass and liquid measurement as well as discussions on many of the latest consumer measurement issues. Take a look at our ever popular and expanding calculators & conversion sections.

We have just added sections on calibrating open neck provers and made available our Gravimetric Proving Worksheet. Also now available is the H2O density reference book and an open neck proving worksheet. There is so much to see, please look around and don't hesitate to contact us with your comments or to enquire about your custom metrology software needs.

Come back often as we are still editing daily and there will always be lots of new information. Please drop us an email and let us know what you think.

Motor Fuel


Liquefied Natural Gas

Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4) that has been converted to liquid form for ease of storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state. The liquefaction process involves purifying the natural gas as much as possible, specifically to remove condensates and gases such as CO2 and H2S that may freeze or otherwise cause problems at the extremely low temperatures that LNG is kept at. The natural gas is condensed into a liquid at a plant referred to as an LNG train. At close to atmospheric pressure it is cooled to approximately −162 °C (−260 °F). Pressure is usually only slightly above atmospheric pressure (25 kPa).

LNG achieves a higher reduction in volume than compressed natural gas (CNG) so that the (volumetric) energy density of LNG is 2.4 times greater than that of CNG or 60 percent of that of diesel fuel. This makes LNG cost efficient to transport over long distances. Specially designed cryogenic sea vessels (LNG carriers) or cryogenic road tankers are used to ship LNG to distant markets. LNG is principally used for transporting natural gas to markets, where it is regasified and distributed as pipeline natural gas. There are also some processes that will use LNG directly such as fuel for transportation.

Motor fuel means any fuel intended for use in internal combustion engines. In same cases these fuels may also have other uses such as Hydrogen for a fuel cell. If it is a fuel burned for internal combustion for locomotion or stationary power, we will discuss it here. The obvious fuels are gasoline or petrol, diesel and propane but we will also discus emerging fuels such as bio-diesel, compressed natural gas (CNG), liquefied natural gas (LNG), Hydrogen and others. Look for the links at the top of the page to see what is currently covered. Stay tuned for even more discussions.

While we are at it, and in keeping with the philosophy of this site, we will discuss the best methods for measuring these fuels, the drawbacks and issues involved and how to address them. We will also look at related emerging liquids such as DEF which is not a fuel at all but may be considered as a mandatory additive for some newer engines.

Last modified: 28 April 2015 20:20:00