Item Price Qty
Digital Psychrometer / Thermo-Hygrometer
Digital Psychrometer / Thermo-Hygrometer - with NIST Certification
Digital Psychrometer / Thermo-Hygrometer
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Fast and Accurate Humidity and Air Temperature Readings

This Digital Psychrometer/Thermo-Hygrometer provides simultaneous relative humidity and air temperature readings, as well as automatically calculating wet bulb and dew point temperature. Monitoring and controlling the relative humidity and air temperature is vital during the lamination process of any composite material. Most resin manufacturers do not recommend open-mold lamination if the RH exceeds 70%.  If the humidity is too high, it may result in improper cure of your finished composite part. Fiber Glast does not recommend the use of our polyester resins below 55 (F) and our System 2000 Epoxy requires a minimum of 77 (F), so measuring ambient air temperature during the laminating process is also critical. 

The Digital Psychrometer/Thermo-Hygrometer is also available with NIST certification. This is an assurance program that certifies that a laboratory, manufacturer or individual product is fully equipped to calibrate equipment to National Institute of Standards and Technology (NIST) standards. The Digital Psychrometer/Thermo-Hygrometer includes two AAA batteries.


  • Simultaneous display of %RH, temperature and dew point or wet bulb
  • Max/Min/Average readings
  • Fast response
  • Data Hold Function
  • User selectable °F/°C
  • Low battery indicator and auto shut-off


Measuring Range -4 to 158°F (-20 to 70°C)
Accuracy ±1.0°F (0.6°C)
Dew Point  
Measuring Range -109 to 122°F (-78 to 50°C)
Accuracy ±3% 
Wet Bulb  
Measuring Range -69 to 122°F (-21 to 50°C)
Accuracy ±3% 
Measuring Range 0-100% RH
Accuracy ±3% RH 



1 Year Manufacturer Defect Warranty

This item, when ordered alone, will typically ship in a small box. Where possible, we will combine ordered items to reduce the number of boxes shipped.
The Digital Psychrometer / Thermo-Hygrometer is sold by the unit.