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QUESTemp° 44/46/48N Area Waterless Wet Bulb Heat Stress Monitors

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The QUESTemp° 44/46/48N utilizes a waterless wet bulb sensor designed for working environments where daily instrument upkeep is difficult. 

Product Details

A high-quality humidity sensor and proprietary algorithm perform the calculation of the Wet Bulb Globe Temperature (WBGT) values, eliminating the hassle of daily wet bulb maintenance.


  • Utilizes WBGT sensing technology; the standard for heat stress management
  • Waterless wet bulb sensing technology eliminates daily maintenance
  • Convenient stay time parameters per multiple standards help determine work-rest ratios
  • IP 54 ingress rating helps protect unit from exposure to dirt, dust, oil and water
  • Designed to withstand the rigors of everyday use in demanding environments


Measurement Parameters QT°44 QT°46 QT°48N
Dry bulb, wet bulb and globe temperatures + + +
Air Velocity   Optional  
WBGT (indoor index) + +  
WBGT (outdoor index) + + +
Heat index/ HUMIDEX + +  
Temperature reading: Celsius or Fahrenheit + + +
Data logging intervals: 1, 2, 5, 10, 15, 30 or 60 minutes + + +
Event logging mode     +
Time & date stamping with clock and calendar + + +
Displayed stay times: ACGIH TLV, U.S. Navy PHEL charts, U.S. Navy/Marine Corp. Ashore Flag Conditions, EPRI action limits (QT°48N excludes EPRI) + + +
Head-Torso-Ankle Weighted Average WBGT (optional with tri-sensors) optional optional  

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