PCE-VOC 1 is a portable handheld volatile organic compound (VOC) and formaldehyde (HCHO) meter or gas leak detector for indoor air quality (IAQ) monitoring applications. This easy-to-use VOC meter is ideal for measuring total volatile organic compound (TVOC) and formaldehyde (HCHO) levels in homes, offices, factories, laboratories, hotels, schools and other indoor environments. - TVOC range: 0.00… 9.99 ppm - HCHO range: 0.00… 5.00 ppm - Displays units in ppm or mg/m - Audible and visual alarms - Long-lasting rechargeable battery