Indicator, Carbon Monoxide

A chemical indicator changed color as it absorbed carbon monoxide, warning a crew of a gas they could not smell.

Date: 1943
Maker: Cambridge Instrument Co.
Place: United States of America
Materials: Possible Cadmium Plating, Aluminum Alloy, Non-Magnetic Metal Alloy, Glass, Paint, Possible Silver Plating, Unknown Green-Yellow Chemical Compound, Unknown Purple-Brown Chemical Compound, Grease Pencil
Dimensions: 3-D: 8.3 × 11.4 × 11.4cm (3 1/4 × 4 1/2 × 4 1/2 in.)
Museum: National Air and Space Museum
Credit line: Transferred from the Department of Commerce

Color indicator changes as Carbon Monoxide is absorbed; 24-volt; alt. set.