Search Results
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Congratulations to the winners in the Beckman oldest pH meter contest
- 1971
Congratulations to CalTech, who in 1971 had the oldest Beckman Instruments pH meter still in operating condition according to this advertisement. The Model F was introduced in 1936 and the Model G in 1937, back when…
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Beckman HC/CO Tester in use measuring automobile exhaust
- 1970s
A man in a lab coat and a woman with a clipboard record the readings of an HC/CO Tester attached to the tailpipe of an automobile. This instrument measures the levels of hydrocarbons (HCs) and carbon monoxide (CO)…