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Extech RH300 Digital Psychrometer
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Extech RH300
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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 T-2 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)
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Description
External Probe Temperature measurements for differential. Calculates T1-T2 differential (Air Temperature minus External Probe Temperature).
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Models, Options, & Accessories
| Model |
Description |
List Price |
Sale Price |
| RH300 |
PSYCHROMETER, DIGITAL |
| $89.99 |  |
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| RH300-NIST |
PSYCHROMETER WITH NIST RH300 |
| $194.99 | |
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| RH305 |
PSYCHROMETER, DIGITAL KIT |
| $129.99 | |
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| RH305-NIST |
PSYCHROMETER KIT W/NIST RH305 |
| $234.99 | |
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| Model |
Accessories |
List Price |
Sale Price |
| RH401-CAL |
HUMIDITY SOLUTION KIT FOR RH401, 33% & 75% |
| $49.99 | |
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| TP890 |
PROBE, THERMISTOR FOR RH300 |
| $14.99 | |
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Specifications
| General |
| Humidity |
10 to 90%RH |
| Temperature (internal) |
-4 to 122°F (-20 to 50°C) |
| Temperature (external) |
-4 to 158°F (-20 to 70°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 |
7x1.9x1" (178.5x48.4x24.7mm) |
| Weight |
3.3oz (95g) |
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