Help identify gas sensor tubes CE-122

[MarkAren]

http://www.geocities.com/markaren10/misc/tubes.jpg

Hi All,

I have just acquired two glass tubes, just over 6" long and 0.6" dia
max with electrical connections at their ends.

The main tube is marked CE-122 Active Element Hard Glass, the other
one is marked Compensator Element.

The internal structures appear to be identical - two fine wires on a
suspension mechanism.

The Compensator may be evacuated, and has a getter has been fired to
remove any trace of Oxygen (?), the usual silver deposit is present.

The Active element has an open end and was attached to a (sample ?)
feed from pump mechanism via a rubber hose.

Each unit has two wires attaching to the top and enter the tube via
hermetic seals.

DC resistance of each is around 4 ohms and do not appear to be very
temperature sensitive.

The piece of the equipment that they were attached to did have an
Ultra Violet warning, so presumably UV is part of the process...

Any ideas what type of gas these might be used to detect ?

Many thanks,

Mark

 

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You have a early form of thermocouple guage, the compensator is at a
known vacuum level and both fit in a wheatstone bridge. Thats old
tech, 30s or 40s, maybe early 50s. The American Vacuum Society might
want them for a museum piece. The gas is almost certainly air.

Steve Roberts

 

[MarkAren]

You have a early form of thermocouple guage, the compensator is at a
known vacuum level and both fit in a wheatstone bridge. Thats old
tech, 30s or 40s, maybe early 50s. The American Vacuum Society might
want them for a museum piece. The gas is almost certainly air.

Steve Roberts

Many thanks.

Anyone I can talk to at AVS ?

-Mark