Check the listing for details. EXTECH VFM200 Formaldehyde Meter,LCD Display 52ZK80. Condition: New. Listed at 429.70 USD. Formaldehyde Meter, Calibration Certificate Type Not Certified, Digital Display Screen Type LCD with Backlight, Features Fuel Cell Formaldehyde Sensor, Two Selectable Units of Measure (PPM, Mg/m3), Includes Universal Power Adapter, Maximum Carbon Dioxide Measured Not Applicable, Maximum Carbon Monoxide Measured Not Applicable, Maximum Dew Point Measured Not Applicable, Maximum Oxygen Measured Not Applicable, Maximum Pressure Measured Not Applicable The VOC/formaldehyde meter measures VOC compound and formaldehyde concentrations in real time. Fast response time, compact, easy-to-carry, and excellent for checking the indoor air quality of homes, offices, factories, hotels, schools and other indoor environments. Potential sources for VOCs include paints, finishes, adhesives, cigarette smoke,.