• Psychromètre à batterie

Psychromètre à batterie

  • Psychro-Dyne

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The Psychro-Dyne requires no whirling or special techniques and may operate in confined areas.

The operator is only required to wet te wick on the wet bulb, turn the instrument on, and allow the constant aspiration rate to cause the depression in wet bulb temperature. This operation, when compared to the conventional sling psychrometers, affords a safer, convenient, and more accurate method of RH determination. Night-time and dark space readings are provided by increasing the intensity of the illuminating thermometer scale. The high thermometers' breakage rate of the sling psychrometers is also eliminated in the Psychro-Dyne since the thermometers are shock mounted.



  • Greater than 1% accuracy for RH determination
  • Greater than 1/4% accuracy on thermometers
  • 1000 readings on 3 «D» cells
  • Variable intensity, built-in illumination
  • Requires no whirling or special technique
  • Steady aspiration allows readings in 1-1/2 to 2 min.
  • Customized, high-density polyethylene carrying case, spare wick and lamp included
  • Meets federal spec. GG-P-725B, Type III, Style B, NIST Certification available



  • Air conditioning
  • Heating
  • Refrigeration
  • Laboratories
  • Hospitals
  • Meteorology
  • Computer rooms
  • Mining
  • Printing
  • Warehousing
  • Transportation
  • Textile Manifacturing
  • Food Processing
  • Chemical Processing



  • Black custom molded carrying case
  • Instruction manual (contains part lists, humidity and dewpoint tables)
  • One 2oz. plastic water bottle
  • Psychrometric slide rule
  • Spare part kit consist of extra wicking material and lamp


Psychrometric Tables  10 to 140°F for relative humidity and dewpoint determination
Response Time 1-1/2 to 2 minutes
Thermometers Length  8-7/8 in.
Thermometers  °F range: 10 to 120°F (matched within 1/2°)
°C range: -15 to 45°C
Graduations  Whole degrees
Accuracy ±0.3°F (±0.2°C) over entire range
Slide Rules  +20 to 120°F (-10 to 60°C)
Battery life  1000 operations with three standard "D" cells
Speed  8500 rpm
Current no load  50 Milliamperes
Type  4.5V, direct current, permanent magnet
Weight  Including carrying case less batteries 2-1/2 lbs
Shipping Weight  3 lbs
H8500-0000  Battery operated psychrometer, mercury, °C
H8500F-000  Battery operated psychrometer, mercury, °F
H8500-ORGA Battery operated psychrometer, organic, °C
H8510-0000  Replacement thermometer pair, mercury, °C
H8510-ORGA  Replacement thermometer pair, organic, °C