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  2. Thermocouple - Wikipedia

    en.wikipedia.org/wiki/Thermocouple

    A thermocouple (the right most tube) inside the burner assembly of a water heater Thermocouple connection in gas appliances. The end ball (contact) on the left is insulated from the fitting by an insulating washer. The thermocouple line consists of copper wire, insulator and outer metal (usually copper) sheath which is also used as ground. [33]

  3. Thermopile - Wikipedia

    en.wikipedia.org/wiki/Thermopile

    The two top thermocouple junctions are at temperature T 1 while the two bottom thermocouple junctions are at temperature T 2. The output voltage from the thermopile, ΔV , is directly proportional to the temperature differential, ΔT or T 1 - T 2 , across the thermal resistance layer and number of thermocouple junction pairs.

  4. Pilot light - Wikipedia

    en.wikipedia.org/wiki/Pilot_light

    A photoresistor is used to detect the light from the pilot lamp. When the pilot light goes out, electrical circuitry connected to the photoresistor shuts off the gas valve. Use of a pilot generator or a thermocouple in the flame provides heating appliance safety as it generates enough electric current from the burning flame to hold the gas ...

  5. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    As illustrated in the use of the thermostat above, all of the power for the control system is provided by a thermopile which is a combination of many stacked thermocouples, heated by the pilot light. The thermopile produces sufficient electrical power to drive a low-power gas valve, which under control of one or more thermostat switches, in ...

  6. Aircraft fuel system - Wikipedia

    en.wikipedia.org/wiki/Aircraft_fuel_system

    The first function is to act as a fuel shut-off valve. This is required to provide the crew with a means to prevent fuel reaching the engine in case of an engine fire. The second function is to allow the pilot to choose which tank feeds the engine. Many aircraft have the left tank and right tank selections available to the pilot.

  7. Exhaust gas temperature gauge - Wikipedia

    en.wikipedia.org/wiki/Exhaust_gas_temperature_gauge

    An exhaust gas temperature gauge (EGT gauge or EGT sensor) is a meter used to monitor the exhaust gas temperature of an internal combustion engine in conjunction with a thermocouple-type pyrometer. EGT gauges are found in certain cars and aeroplanes. By monitoring EGT, the driver or pilot can get an idea of the vehicle's air-fuel ratio (AFR).

  8. 7 of Google’s most-searched health questions in 2024, with ...

    www.aol.com/7-google-most-searched-health...

    Since lupus can impact different parts of the body, symptoms may vary. The disease is most common in women aged 15 to 44, Stockdale noted. Americans were curious about how much water they should ...

  9. Systems for Nuclear Auxiliary Power - Wikipedia

    en.wikipedia.org/wiki/Systems_for_Nuclear...

    The SNAP-27 power supply weighed about 20 kilograms, was 46 cm long and 40.6 cm in diameter. It consisted of a central fuel capsule surrounded by concentric rings of thermocouples. Outside of the thermocouples was a set of fins to provide for heat rejection from the cold side of the thermocouple.

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