Hood assembly for opacity monitor

Details Hood assembly for opacity monitor Hood assembly for opacity monitor

1988-11-07

1990-02-20

Chapman, John

Measuring and testing

Instrument casing

73 23, 356438, G01D 1124, G12B 902

Patent

active

049015680

ABSTRACT:
A hood assembly for opacity monitoring equipment including an opacity monitor fixedly secured to an outside surface of a smokestack or chimney includes a hood for protectably covering the opacity monitor and associated guide. The guide is connectable to the monitor in a stationary relationship therewith and cooperates with the hood for guiding bodily displacement of the hood relative to the monitor along a substantially vertical path between a lowered condition at which the monitor is substantially covered by the hood and an elevated condition at which the monitor is accessible.

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