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2. Catalytic bead sensor - Wikipedia

   en.wikipedia.org/wiki/Catalytic_bead_sensor

   Passing combustible gas raises the temperature further which increases the resistance of the platinum coil in the catalysed bead, leading to an imbalance of the bridge. This output change is linear, for most gases, up to and beyond 100% LEL , response time is a few seconds to detect alarm levels (around 20% LEL), [ 1 ] at least 12% oxygen by ...

3. Autogas - Wikipedia

   en.wikipedia.org/wiki/Autogas

   Autogas or LPG is liquefied petroleum gas (LPG) used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane. [1] Autogas is widely used as a "green" fuel, as its use reduces CO 2 exhaust emissions by around 15% compared to petrol. [2]

4. Liquefied petroleum gas - Wikipedia

   en.wikipedia.org/wiki/Liquefied_petroleum_gas

   LPG, vaporised and at atmospheric pressure, has a higher calorific value (46 MJ/m 3 equivalent to 12.8 kWh/m 3) than natural gas (methane) (38 MJ/m 3 equivalent to 10.6 kWh/m 3), which means that LPG cannot simply be substituted for natural gas. In order to allow the use of the same burner controls and to provide for similar combustion ...

5. Pressure regulator - Wikipedia

   en.wikipedia.org/wiki/Pressure_regulator

   All vehicular motors that run on compressed gas as a fuel (internal combustion engine or fuel cell electric power train) require a pressure regulator to reduce the stored gas (CNG or Hydrogen) pressure from 700, 500, 350 or 200 bar (or 70, 50, 35 and 20 MPa) to operating pressure. [citation needed])

6. Coupon - Wikipedia

   en.wikipedia.org/wiki/Coupon

   Coupons can be used to research the price sensitivity of different groups of buyers (by sending out coupons with different dollar values to different groups). Time, location and sizes (e.g. five pound vs. 20 pound bag) [12] affect prices; coupons are part of the marketing mix. [13] So is knowing about the customer. [14] [12]

7. Propane - Wikipedia

   en.wikipedia.org/wiki/Propane

   A 20 lb (9.1 kg) steel propane cylinder. This cylinder is fitted with an overfill prevention device (OPD) valve, as evidenced by the trilobular handwheel. Propane (/ ˈ p r oʊ p eɪ n /) is a three-carbon alkane with the molecular formula C 3 H 8. It is a gas at standard temperature and pressure, but compressible to a