Despite such opposition, the first meters were installed by the Dual Parking Meter Company beginning in July 1935; they cost a nickel an hour, and were placed at 20-foot intervals along the curb that corresponded to spaces painted on the pavement.
The single solution for everything in your air. Many air cleaning systems filter out particles. Some combat germs, and some fight odors. But only the PureAirâ¢ Air Purification System addresses all three types of indoor air pollutants.
Ambient Air Analyzer. The ambient air analyzer measures and tests VOCs and a large list of atmospheric gases. They let you easily collect and analyze air samples. Galsonâs air analyzers include the ambient air analyzer, dust/particulate, gas monitors, IAQ monitors, mercury monitors, ozone monitors. Mercury is, of course, important to monitor.