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Compact WBGT Heat Index Meter (WBGT-208) 40mm Black Ball

Model #: WBGT-208

Condition: New

Regular Price: $259.95 $179.00

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Lutron WBGT Heat Index Meter with 40mm Black Brass Ball.

Compact size with high accuracy and audible alarm.

WBGT (wet-bulb globe temperature) was developed as a monitoring basis at US military training camps and became widespread for the use in workplaces and sports training facilities all over the world. It is suggested in the international standard ISO 7243, OSHA (US Occupation Safety), Japan Society for Occupational Health and the SMA (Sports Medicine Australia) in establishing the permissible heat exposure limits in health, sports or other physical activities.

  • Measurement:
    • WBGT: value (indoor/outdoor wet bulb globe temperature).
    • TG: Black globe temperature.
    • RH: Relative humidity.
    • TA: Air temperature.
    • WB: Wet bulb temperature.
    • DP: Dew point temperature.
  • Adjustable WBGT alarm setting (when the WBGT value is over the alarm threshold, the buzzer will sound along with a flashing display).
  • Use to control and monitor physical activity in hot environments to limit the danger of heat related injuries.
  • Threaded tripod mount.


  • Black globe temperature range (TG): 32° to 176°F (0° to 80°C) with 0.1° resolution.
  • Black globe temp. accuracy: plus or minus 1.1°F (0.6°C).
  • Humidity range: 5 to 95% RH with 0.1% resolution.
  • Humidity accuracy (within): 3% of reading.
  • Dew point temperature range: -13.5° to 120.1°F (-25.3° to 48.9°C) with 0.1° resolution.
    Dew Point Temperature is calculated automatically from Humidity and Air Temperature.
  • Wet bulb temperature range: -6.9° to 122.0°F (-21.6° to 50.0°C) with 0.1° resolution.
    Wet Bulb Temperature is calculated automatically from Humidity and Air Temperature.
  • WBGT formula:
    • Outdoor and no sun: WBGT = (0.7 x WB) + ( 0.3 x TG) globe Temperature.
    • Outdoor and full sun: WBGT = (0.7 x WB) + (0.2 x TG) + (0.1 x TA).
  • Sampling time: approximately 1 second.
  • Operating Temperature: 32° F to 122° F (0° to 50° C).
    NOTE most batteries are not rated for below -4° F or above 125° F.
  • Operating Humidity: less than 85% RH non-condensing.
  • Power: (3) AAA alkaline batteries or equivalent.
  • Dimensions:
    • Power Current (consumption):
      • with LCD Backlight OFF, approximately 5 mA.
      • with LCD backlight ON, approximately 11 mA.
    • Meter: 7" x 2.2" x 0.9" (177 x 57 x 24mm).
    • Black brass ball: 1.57" (40mm).
  • Weight: 4 ounces (130 grams), without batteries installed.

Supplied with:

  • CA-05 Carrying Case
  • Instruction manual.
  • 40mm black brass ball.

Lutron Certificate of Calibration

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