The role of global radiation measured by a light sensor on heat stress assessment

The purpose of this study was to evaluate a new and relatively small (5 mm) light (L) sensor in order to measure global radiation (GR) for use in heat stress assessment, Data were collected during 25 days from three instrumen ts: L, pyranometer (P) and black globe. Analysis of these data revealed the construction of a new model which converted the L data measured in mV to P values measured in W.m(-2) as follows: P=-13.81+0.619L-0.0001278L(2). The correlation coefficient between P and L was very high (R-2 =0.933, P<0.001) , Therefore, we concluded that the L sensor has the potential to measure GR for use in heat stress assessment. (C) 2001 Elsevier Science Ltd. All righ ts reserved.