QUESTemp 48N Heat Stress Meter

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Item #: QT-48N
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QUESTemp 48N Heat Stress Meter

The QUESTemp 48N model was specifically engineered for the Department of Defense Ashore and Afloat Operations in which conditions require hand’s free monitoring, in-the-field user RH/WBGT sensor alignments, and snapshot measurement logging (called “event logging mode”).

The QT48N measures and calculates the dry bulb, wet bulb, globe, WBGT outdoors,and relative humidity with two different types of data logging modes – as a time history session or an event logging mode.

You also have the capability to measure stay times in order to manage work/rest regimens. Guidance is based on the screening criteria for heat stress as defined in the ACGIH TLV Handbook, U.S. Navy PHEL charts, and Flag Conditions for U.S. Navy/Marine Corp. Ashore.


  • Waterless Web Bulb
  • Engineered for DoD Ashore and Afloat Operations


  • (Alkaline Battery)- Standard Accessories, (1)* Sensor Bar Assembly with Calculated Wet Bulb using Replaceable RH Sensor, and 2" Style Globe Sensor

*Sensor Bar Assembly (1) includes: 1 sensor bar containing a Wet Bulb, Dry Bulb, Globe Temperature & Humidity (%RH) sensors.

QUESTemp 48N Heat Stress Meter

Temperature Range-5 to 100°C (23 to 212°F)
Relative Humidity Range0 to 100%
Case / HousingAluminum, D-Ring attachment and lanyard
Size9.2 x 7.2 x 3" (23.4 x 18.3 x 7.5 mm)
Weight2.6 lbs ( 1.2 kg)
Available Measurements• Celsius and Fahrenheit Scale
• Wet Bulb
• Dry Bulb
• Globe
• WBGT Indoor / Outdoor
• Relative Humidity
• Heat Index
• Humidex
• Air Flow
Power Source9V Disposable Batteries (80 Hrs.),
NiMH Rechargeable Option (160 Hrs.), AC Adapter
InputsRTD Temperature Sensor, Capacitive Polymer
Relative Humidity Sensor
OutputsRS232 Serial Computer / Printer Interface,
Parallel Printer Interface
Standards / ApprovalsElectromagnetic Conformance, CE Mark
DataloggingTime History Profile for all Displayed Parameters
Datalogging Intervals1, 2, 4, 10, 30, or 60 minutes
Event Logging (1 Second Record )
DMS CompatibleYes
QSP II CompatibleYes
Stay Time / Work Rest Cycles• ACGIH TLV Handbook
• EPRI Action Limits
• U.S. Navy PHEL Charts
• U.S. Marine Flag System

QUESTemp 48N Heat Stress Meter

How To Operate the QUESTemp Heat Stress Monitor Video

QUESTemp Heat Stress Monitor Power Options and Rechargeable Battery Installation Video

QUESTemp 48N Heat Stress Meter

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