Air temperature alone cannot explain workload, radiant heat or the effect of protective clothing. Start by distinguishing thermal comfort assessment from heat stress screening.
Separate comfort from heat stress
Comfort in an office and heat load during work near furnaces or outdoors are different assessments. WBGT is an environmental screening index; it is neither body temperature nor an automatic safe working time.
Record the context
Document indoor or outdoor conditions, sun and radiant sources, physical workload, clothing, PPE and task durations. Locations and timing must represent exposure. Follow the manufacturer’s instructions for sensor placement, stabilisation and maintenance.
Specify the required output
WBGT monitoring requires suitable sensors. Broader microclimate work may require air temperature, humidity, velocity and radiant conditions. For PMV/PPD calculations, define all inputs and the assessment method separately. Instruments and probes do not automatically support every assessment.
Use results to improve controls
Competent personnel should consider results alongside workload and clothing. Options include reducing heat sources, ventilation, cooler rest areas and reviewing work arrangements. One WBGT reading does not establish universal work/rest times or medical fitness.
Discuss your measurement task with NOVEL
Tell us your application, working conditions and required output so we can help select an instrument and accessories.
Sources
General technical information. Use current manufacturer instructions and applicable local assessment methods for the actual task.