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

Abstract 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 instruments: 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+0.619 L −0.0001278 L 2 . The correlation coefficient between P and L was very high ( R 2 =0.933, P L sensor has the potential to measure GR for use in heat stress assessment.