Heat & Weather Stations

Prevent workers from prolonged heat exposure with heat stress meters. These devices assess environmental heat conditions using WBGT and TWL calculations, offering guidance on work-rest scheduling and hydration planning. Solutions include handheld TWL-1S model for on-site use and TWL-1SV for remote heat monitoring.

Why Heat Stress Measurement in Worksites is Important?

Measuring heat stress is important for worksite safety in hot and physically demanding environments. It provides a reliable assessment of thermal conditions through established indices such as Wet Bulb Globe Temperature (WBGT), Thermal Work Limit (TWL), and Heat Index. These heat data support informed decisions, such as adjusting work schedules, adding rest periods, or improving hydration plans, especially during periods of extreme heat or in the summer months. Proactive monitoring helps prevent heat-related illnesses and ensures safer working conditions.

What is Thermal Work Limit (TWL)?

Thermal Work Limit (TWL) is a globally recognized heat safety index. It was developed by Graham Bates and Derrick Brake in 1997. TWL estimates the maximum level of physical work a well-hydrated, acclimatized worker can safely sustain in a specific environment—without exceeding physiological safety thresholds, such as a core body temperature below 38.2 °C (100.8 °F) and a sweat rate below 1.2 kg (2.6 lb) per hour.