Heritage Electronics

Back in the 1980’s, the the US Hawk company marketed a low-cost analyser for car exhaust gas. I wouldn’t like to say whether or not this device is/was very accurate, but the hard-to-find user manual is provided as a pdf file below;

Hawk 766 Gas Analyzer

Sadly, the manual points out that this instrument will not work on a car fitted with catalytic convertor.



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