temperature measuring device / relative humidity / moisture / air

One of the family member of Testo measuring device is the Testo 610 which is widely known for its relative measurement of air moisture and temperature synchronously. This device has multitasking capability because it also works for dew point calculation, wet bulb, hold function and display for maximum-minimum variables. The device promises long term stable Testo humidity sensor, +/-2.5% RH accuracy, back-lit display allowing bright or dark areas operations, and a protective cap for safety handling.