The temperature meter is equipped with various sensors to determine HCHO, TVOC, ambient temperature and ambient humidity. The temperature meter thus already covers a large spectrum of measuring tasks. - HCHO measuring range: 0.00 5.00 mg/m - TVOC measuring range: 0.00 9.99 mg/m - Temperature measuring range: 0 50 C / 32 122 F - Humidity measuring range: 0 100% RH - Memory for 5000 measuring points - Battery and mains operation