... , Temperature, Dew Point, & Wet Bulb TemperaturesThe Model RP2 Wireless Thermo-Hygrometer Probe measures relative humidity, temperature, dew point, and wet bulb ... :Process: -4 to 140°F (-20 to 60°C); Ambient: 5 to 125°F (-15 to 51°C); Battery Charging: 32 ... @ 77°F (±0.3°C @ 25°C).Response Time:1.5 s.Probe Length:8" (203 mm) insertion.Power Requirements:3 ...