美国Extech RH300 干湿球湿度计
温度计＋干湿球湿度计RH300
外接探头实现温差测量
- 同时显示湿度，温度、露点或湿球温度、探头温度
- 计算T1-T2温度差（环境温度-探头温度）以及T2露点温度
- 数据保持、自动关机最大值、最小值
| 技术参数 | |
| 探头类型： | 电容式 |
| 露点温度： | -68~49.9℃ |
| 湿球温度： | -21.6~49.9℃ |
| 湿度量程及精度： | 10~90 %RH（±3%RH） |
| 温度（内置）： | -20~50℃精度：±0.6℃ |
| 温度（外置）： | -20~70℃精度：±0.6℃ |
Digital Psychrometer
External Probe Temperature measurements for differential
Calculates T1-T2 differential (Air Temperature minus External Probe Temperature)
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
• Switchable °F/°C temperature units with 0.1° resolution
• Data Hold freezes current reading on display
• Max/Min readings
• Auto power off to save battery life
• RH300 complete with 2 AAA batteries
• Optional external temperature probe (TP890)
• Optional kit RH305 includes RH300, temperature probe,33% and 75% calibration bottles, and carrying case
Specifications: Range Max Resolution Basic uracy
Humidity 10 to 90%RH 0.1%RH ±3%RH
Temperature (internal) -4 to 122°F (-20 to 50°C) 0.1° ±1°F or ±0.6°C
Temperature (external) -4 to 158°F (-20 to 70°C) 0.1° ±1°F or ±0.6°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)
Ordering Information:
RH300 ..........................Digital Psychrometer
RH300-NIST ................RH300 with NIST Certificate
RH305 ..........................Digital Psychrometer Kit
RH305-NIST ................RH305 with NIST Certificate
RH300-CAL ..................33% and 75% RH calibration reference
TP890 ..........................Optional Thermistor Temperature Probe (for Model RH300)
