The Wet Bulb Globe Heat Stress Meter is a lightweight meter that’s compact enough to carry anywhere. WBGT Temperature Air Temperature Relative Humidity Globe Temperature OSHA and other government organization have set recommended heat stress limits for various activities. WBGT Wet Bulb Globe Temperature provides the most accurate determination of the heat stress index based on the cumulative effect of air temperature, air movement, relative humidity, and radiant heat. Helps avoid heat exhaustion in public health, sports, military and industrial activities. Highly accurate readings with a typical response time of only 15 seconds. Provides settings for both indoor and outdoor activity and includes an audible alarm, adjustable to your WBGT threshold. One of the many advantages of the WBGT Heat Stress Meter is its ability to stream data directly to a computer to log real-time information. In order to connect this model to a computer to stream data, you will need the USB Cable #840054 and Data Acquisition Software #840052. Comes with tripod screw and has the ability to connect with a computer with the proper accessories. Globe diameter:11⁄2 38 mmMeter dim: 93⁄4 × 2 × 11⁄4 248 × 51 × 32 mmWeight: 4.6 oz 130 g *Certification Option N.I.S.T. traceable Certificate of Compliance available at additional cost Select option above. Specifications Unit of Measure Range Resolution Accuracy WBGT 0 to 50 degrees C32 to 122 degrees F 0.1 degrees C/F ±2 degrees C indoor, 3 degrees C outdoor-15 to 40 degrees C otherwise ±2.5 degrees C indoor,3.5 degrees C outdoor Air Temperature 0 to 50 degrees C32 to 122 degrees F 0.1 degrees C/F ±0.6 degrees C Globe Temperature 0 to 80 degrees C32 to 176 degrees F 0.1 degrees C/F ±2 degrees C 15 to 35 degrees C Relative Humidity 0 to 100% 0.1% RH ±3%10 to 90% otherwise ±5% Downloads Instruction Manual Product Brochure Comparison Chart Comparison Chart