Hygro-Thermometer Psychrometer Extech RH300

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The RH300 is a compact meter that is ideal for field applications. Simultaneously displays relative humidity (10% to 90% RH), air temperature and dew point or wet bulb. Calculates T1-T2 differential (air temperature minus external probe temperature) using optional probe (TP890), and T2 minus dew point. Built-in protective sensor cap. Other features include Data Hold, Auto Power Off, and MAX/MIN reading. Complete with 2 AAA batteries.
Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or Probe Temperature
Wet bulb measurements without slinging
Calculates T1-T2 differential (Air Temperature-External Probe Temperature) using optional probe
Unique sensor cap design twists to closed position for protection during storage
Switchable °F/°C temperature units with 0.1° resolution

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Specifications	Ranges	Max Resolution	Basic Accuracy
Humidity	10 to 90%RH	0.1%RH	±3%RH
Temperature (internal)	-4 to 122°F (-20 to 50°C)	0.1°	±1.8°F or ±1°C
Temperature (external)	-4 to 158°F (-20 to 70°C)	0.1°	±1.8°F or ±1°C
Dew Point	-90.4 to 122°F (-68.0 to 49.9°C)
Wet Bulb	-6.9 to 122°F (-21.6 to 49.9°C)
Dimensions	7 x 1.9 x 1″ (178.5 x 48.4 x 24.7mm)
Weight	3.3oz (95g)