. 2017 Dec;52(12):1161–1167. doi: 10.4085/1062-6050-52.12.18

Table 1. .

Costs and Descriptions of Wet Bulb Globe Temperature Devices Assessed

Unit	Manufacturer	Reported Accuracy			Size of Unit (Height × Width × Depth), cm	Diameter of Black Globe, cm	Corrects Black Globe to 15 cm?	Retail Value,^a $
Unit	Manufacturer	Wet Bulb Globe Temperature, °C	Air Temperature, °C	Relative Humidity, %	Size of Unit (Height × Width × Depth), cm	Diameter of Black Globe, cm	Corrects Black Globe to 15 cm?	Retail Value,^a $
General WBGT8778 Heat Index Checker	General Tools & Instruments LLC, Secaucus, NJ	Unreported	±0.6	±3	27.8 × 7.5 × 7.5	7.5	No information	189.95^b
REED Heat Index WBGT Meter model SD-2010	REED Instruments, Wilmington, NC	Unreported	±0.8	±3	17.7 × 6.8 × 4.5	7.5	No information	219.00^c
Extech HT30 Heat Stress Wet Bulb Globe Temperature Meter	FLIR Commercial Systems Inc, Nashua, NH	±2.0	±1.0	±3	29.2 × 8.9 × 8.6	4.0	No information	169.99^d
QUESTemp° 34	3M Detection Solutions, St. Paul, MN	Unreported	±0.5	±5	23.5 × 18.3 × 7.5	5.1	Yes	2926.60^e
Kestrel 4400 Heat Stress Tracker	Neilsen-Kellerman Co, Boothwyn, PA	±0.7	±0.5	±3	16.5 × 5.9 × 2.8	2.5	Yes	469.00^f
WBGT-103 Heat Stroke Checker	Kyoto Electronics Manufacturing Co, Ltd, Kyoto, Japan	±2.0	±1.0	±5	24.0 × 4.0 × 3.2	2.4	Yes	99.00^g

^{^a}

Retail value at the time of the assessment.

^{^b}

General Heat Index Tracker manufacturer's information.

^{^c}

Reed Instruments manufacturer's information.

^{^d}

Extech manufacturer's information.

^{^e}

Quest Technologies manufacturer's information.

^{^f}

Kestrel manufacturer's information.

^{^g}

Kyoto manufacturer's information.