Onkaram B, Stroschein L A, Goldman R F
Am Ind Hyg Assoc J. 1980 Sep;41(9):634-41. doi: 10.1080/15298668091425428.
Environmental heat stress, expressed as the Wet Bulb Globe Temperature (WBGT), was measured outdoors using three different instruments: a) the conventional shaded dry-bulb, 15.2-cm black globe and naturally convected wet bulb thermometers, b) a minaturized thermometer kit, and c) a commercial WBGT instrument using a thermistor sensors. The WBGT values were compared with the Wet Globe Temperature (WGT) measured with a Botsball. Measurements were made visually on the instruments at regular intervals and an automated data collection system also was used to obtain data from thermocouples attached to the instruments. Statisticallly significant differences in WBGT readings were found among the instruments; however, the difference for a given environment usually was less than 0.5 degrees C. Readings taken by visual observations resulted in WBGT values which differed by less than 0.3 degrees C from those calculated from the automated data collection system. By using an equation derived for the Botsball, WBGT = 1.044 WGT - 0.187 (in degrees C), it is possible to convert the Botsball thermometer dial to indicate the conventional WBGT for outdoor environments, thus making it a simple instrument for assessing environmental heat stress at the work site.
环境热应激以湿球黑球温度（WBGT）表示，在户外使用三种不同仪器进行测量：a）传统的带遮阳罩的干球、15.2厘米黑球和自然对流湿球温度计；b）一种小型温度计套件；c）一种使用热敏电阻传感器的商用WBGT仪器。将WBGT值与用博茨球测量的湿球温度（WGT）进行比较。定期对仪器进行目视测量，还使用自动数据采集系统从连接到仪器的热电偶获取数据。各仪器之间的WBGT读数存在统计学上的显著差异；然而，给定环境下的差异通常小于0.5摄氏度。目视观测获得的读数所得到的WBGT值与自动数据采集系统计算得出的值相差不到0.3摄氏度。通过使用从博茨球推导得出的公式WBGT = 1.044WGT - 0.187（单位为摄氏度），可以将博茨球温度计刻度转换为指示户外环境的传统WBGT，从而使其成为一种在工作现场评估环境热应激的简单仪器。
