2:25am PDT - September 28th, 2021

Intuitive, precise and convenient CO2 measurement for optimum indoor air quality and for minimizing the risk of infection by aerosols - with testo 440 in the practical CO2 kit. Find out more: https://t.co/GWkI6Y5MHH #hvacr #testo #aerosols #CO2measurement https://t.co/slUMlfXBnT

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