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Measurement parameter(s) Relative humidity
Absolute humidity
Temperature
Dew point
Wet bulb
Mixing ratio
Measurement range 0 ... 100 % RH
-40 ... +60 °C (-40 ... +140 °F) T
Measurement accuracy At temperature +20 °C (68 °F):
± 1.0 % RH (0 ... 90 % RH) 
± 1.7 % RH (90 ... 100 % RH) 
± 0.2 °C (± 0.36 °F) T
Operating temperature for electronics -40 ...+ 60 °C (-40 ... +140 °F) 
with display -20 ...+ 60 °C (-4 ... +140 °F) 
storage -40 ...+ 70 °C (-40 ... +158 °F)
Operating voltage 12 ... 28 V
Analog outputs two-wire 4 ... 20 mA x2
Digital outputs RS-232C
Housing classification IP66 (NEMA 4X)