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Apparatus-for-determining-vapor-content-of-a-gas-vapor-mixture

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Apparatus for determining vapor content of a gas/vapor mixture

Details

Inventors: Land, Thomas;
Assignee: Land Pyrometers Limited (Dronfield, GB2)
Primary Examiner: Goldberg; Gerald
Assistant Examiner: Roskos; Joseph W.
Attorney, Agent or Firm: Sigalos & Levine

Apparatus for determining the vapor content of a gas/vapor mixture comprises two temperature sensing devices. One of the devices measures the temperature of a liquid evaporating from a liquid saturated wick in contact with the device. The other temperature sensing device measures the temperature of the gas/vapor mixture in which it is immersed. A cooling device is provided for condensing some of the vapor from the gas/vapor mixture to maintain a liquid supply for the wick.

DETAILED DESCRIPTION I claim: 1.
Apparatus for determining the vapour content of a gas/vapour mixture, said apparatus comprising two temperature sensing devices, one of said devices being adapted to measure the temperature of a gas/vapour mixture in which said device is immersed; a wick in contact with the other of said devices; a cooling device for condensing vapour from said gas/vapour mixture to maintain a liquid supply for said wick, said other temperature sensing device being adapted to measure the temperature of said liquid evaporating from said wick, said cooling device comprising a reservoir for collection of said condensed vapour and in which part of said wick in located, and a tube; said apparatus further comprising a sampling chamber in which said tube is mounted, means for circulating a cooling medium through said tube, and means for drawing the gas/vapour mixture through said sampling chamber so that vapour condenses out of said gas/vapour mixture onto a surface of said tube to form said reservoir, wherein two parts of said tube extend alongside and in contact with one another to form a V-shaped reservoir in which said condensed vapour collects.
2.
Apparatus according to claim 1, wherein said temperature sensing devices are coupled to leads extending along said passage.
3.
Apparatus according to claim 1, wherein said cooling device comprises an air cooled surface.
4.
Apparatus according to claim 1, wherein said cooling device comprises a water cooled surface.
5.
Apparatus according to claim 1, wherein said cooling device comprises a thermo-electrically cooled surface.
6.
Apparatus according to claim 1, wherein at least one of said temperature sensing devices is a mercury in glass thermometer.
7.
Apparatus according to claim 1, wherein at least one of said temperature sensing devices is a thermocouple.
8.
Apparatus according to claim 1, wherein at least one of said temperature sensing devices is a resistance thermometer.
9.
Apparatus according to claim 1, wherein said wick comprises a mineral fibre textile capable of withstanding exposure to hot gases

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