WBGT Heat Stress Meter


This heat stress meter measures temperature, humidity, and direct or radiant sunlight with Wet Bulb Globe Temperature (WBGT).



  • Measures ambient temperature, humidity, wet bulb temperature, black globe temperature, WBGT (wet bulb global temperature), heat stress index, dew point and pressure
  • Heat Stress Index measures how hot it feels when humidity is combined with temperature, air movement and radiant heat
  • Black Globe Temperature (GT) monitors the effects of direct solar radiation on an exposed surface
  • In/Out function displays the WBGT value with or without direct sun exposure
  • Multi-line backlit LCD display simultaneously displays 4 measurements
  • Maximum, Minimum, Average and Data Hold functions
  • Internal memory stores up to 99 measurements
  • User selectable unit of measure (°F or °C)
  • User adjustable WBGT threshold alarm (audible)
  • Tripod mount for long-term monitoring
  • Low battery indicator and auto shut off

REED R6200 Specifications

Measuring RangesAir Temperature: 32 to 122°F (0 to 50°C)
Black Globe: 32 to 176°F (0 to 80°C)
WBGT (Indoor): 59 to 138.2°F (15 to 59°C)
WBGT (Outdoor): 59 to 132.8°F (15 to 56°C)
AccuracyAir Temperature: ±1.1°F (±0.6°C)
Black Globe:
68-122°F (20-50°C): ±1.1°F (±0.6°C)
Other: ±1.8°F (±1°C)
WBGT (Indoor): ±2.7°F (±1.5°C)
WBGT (Outdoor): ±3.6°F (±2°C)
Measuring Ranges5 to 95% RH
Accuracy (@ 25°C)10% to 70% RH: ±3%
Rest of Range: ±5%
Resolution0.1% RH
Barometric Pressure
Measuring Range300 to 1100 hPa (inHg, mmHg switchable)
Resolution1 hPa, 0.1 inHg, 0.1 mmHg
General Specifications
Dew Point/Wet Bulb CalculationYes
Response Time1 sec
BacklightYes (non-condensing)
Data HoldYes
Internal MemoryYes, up to 99 measurements
Auto Shut-OffYes (after 15 mins/off)
User Adjustable
WBGT AlarmYes (audible)
Tripod MountableYes
Low Battery IndicatorYes
Power Supply4 x AAA Batteries, Optional AC Adapter
Product CertificationsCE, RoHS
Operating Temperature32 to 122°F (0 to 50°C)
Operating Humidity<80% (non-condensing)
Storage Temperature-4 to 122°F (-20 to 50°C)
Storage Humidity<90% (non-condensing)
DimensionsInstrument: 6.4 x 2.3 x 1.3" (162 x 58 x 32 mm)
Black Brass Ball Diameter: 2.0" (50 mm)
Weight4.8oz (136g)

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