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You are here: Home > Air Measurement > Psychrometers
Psychrometers

Psychrometers can be used to measure humidity, and relative humidity. To measure relative humidity, the psychrometer relies on the fact that humidity will change evaporation speed. The device consists of two thermometers. One is a dry bulb thermometer that is exposed to the air to measure the temperature. The second is a wet bulb thermometer that is used to determine the rate of evaporation in relation to temperature.  The drier the air, the more quickly the water will evaporate and the cooling effect will be stronger. These devices can compare the two temperatures and determine the humidity based on the difference. When the two thermometers have the same reading, the relative humidity is 100%.

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Extech RH350 Datalogging Superheat Psychrometer Extech HD500 Psychrometer with Infrared Thermometer Extech RH300 Digital Psychrometer
Our Price: 139.99
Our Price: 269.99
Our Price: 94.99
RH350 Datalogging Superheat Psychrometer Extech HD500 Psychrometer with Infrared Thermometer RH300 Digital Psychrometer
Superheat differential measurements: T1-T2, Air-T1, T1-Dewpoint
  • Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or External Probe Temperatures
  • Built-in RS-232 interface (optional RS-232 cable) - uses Windows Hyperterminal to download data to a PC
  • Memory stores up to 99 data records
  • Temperature-K Probes and Calibration Salts are optional (see RH355 kit)
3-in-1 combination meter
Combines the functions of a Humidity Meter, Type K Thermometer, and InfraRed Thermometer for non-contact surface Temperature measurement
  • Built-in InfraRed Thermometer for non-contact temperature measurement to 932F (500C) with 30:1 distance to target ratio
  • Type K Temperature function for contact temperature measurement to 2501F (1372C)
  • Highest 2% RH accuracy
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
  • External Temperature probe and Calibration Salts are optional
Extech RH305 Digital Psychrometer Kit Extech RH355 Datalogging Superheat Psychrometer Kit Extech RH390 Precision Psychrometer
Our Price: 139.99
Our Price: 179.99
Our Price: 189.99
RH305 Digital Psychrometer Kit RH355 Datalogging Superheat Psychrometer Kit RH390 Precision Psychrometer
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 external probe
  • Unique sensor cap design twists to closed position for protection during storage
  • Switchable F/C temperature units with 0.1 resolution
  • Includes: RH300 Psychrometer, TP890 Temperature Probe, and RH Calibration Salts
Superheat differential measurements: T1-T2, Air-T1, T1-Dewpoint
  • Dual Type K external temperature probes
  • Simultaneous display of %RH, Temperature and Dew point or Wet Bulb or External Probe Temperatures
  • Built-in RS-232 interface (optional RS-232 cable) - uses Windows Hyperterminal to download data to a PC
  • Memory stores up to 99 data records
  • Includes the RH350 psychrometer, two Type K temperature probes, 33% and 75% calibration bottles, PC Software, RS-232 cable, four AAA batteries and a carrying case.
Highest 2% RH Accuracy
  • Fast response time (<30 seconds)
  • Dual backlit display
  • Displays Humidity and Temperature, Dew Point, or Wet Bulb
  • Data Hold and Min/Max functions
TPI-597C1 Digital Hygrometer / Psychrometer Extech MO290-EK: Energy Audit Kit Extech AN310 Large Vane CFM/CMM Anemometer/Psychrometer
Our Price: 199.95
Our Price: 1,499.99
Our Price: 349.99
EXT-MO290-EK: Energy Audit Kit Extech AN310 Large Vane CFM/CMM Anemometer/Psychrometer&#8206;
Relative Humidity (RH), Temperature, Ambient Temperature, Dew Point, wet bulb, carrying case.

Small diameter (0.45) probe for measuring in air ducts
Relative Humidity (RH) accuracy of +/-2% provides accurate reliable readings
Measure dew point and wet bulb temperature
Data record function stores minimum and maximum humidity and temperature measurement
39 hard wired probe
Protective rubber boot

Monitor airflow, moisture levels, and provides inspection equipment to find energy loss Extech AN310 Large Vane CFM/CMM Anemometer/Psychrometer
   
 
Reliability Direct, Inc.
900 W. Main Street
Ephrata, PA 17522
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