Extech RH300 Hygro-Thermometer Psychrometer
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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.
Features
• 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 minus
External Probe Temperature) using optional probe
(TP890) and T2-Dew Point
• Unique sensor cap design twists to closed position for
protection during storage
• Data Hold freezes current reading on display
• Max/Min readings
• Auto power off to save battery life
• Optional external temperature probe (TP890)
• Complete with 2 AAA batteries
Specifications
| Specification | Value |
|---|---|
| Dew Point | -90.4 to 122 °F (-68.0 to 49.9 °C) |
| Relative Humidity | 10 to 90% |
| Relative Humidity Basic Accuracy | ±3% |
| Relative Humidity Max Resolution | 0.1% |
| Temperature (Air) | -4 to 122 °F (-20 to 50 °C) |
| Temperature (Air) Basic Accuracy | ±1.8 °F or ±1 °C |
| Temperature (Air) Max Resolution | 0.1 ° |
| Temperature (Type K) Max Resolution | -4 to 158 °F (-20 to 70 °C) |
| Temperature (Type N) | ±1.8 °F or ±1 °C |
| Temperature (Type N) Basic Accuracy | 0.1 ° |
| Wet Bulb | -6.9 to 122 °F (-21.6 to 49.9 °C) |
| Certifications | CE |
| Dimensions | 7 × 1.9 × 1" (178.5 × 48.4 × 24.7 mm) |
| Power | 2 × AAA (1.5 V) batteries |
| Warranty | 2 years |
| Weight | 3.3 oz (95 g) |