testo 610 Compact Humidity/Temperature Meter

Test-meter.co.uk

Precise Testo 610 Thermohygrometer. Measures air temperature -10˚C to 50˚C (±0.5˚C) and humidity 0-100% RH (±2.5%). Backlit display, dew point/wet bulb calculation. Compact design, 200-hr battery. Ideal for workplace climate monitoring.

Amazon

Calculation of dew point and wet bulb temperature Illuminated display Capacitive humidity sensor with long-term stability NTC temperature sensor provides great accuracy