QUESTemp° Series Monitors are designed to provide you with maximum value.

In all QUESTemp° Thermal Environment Monitors a dry bulb sensor measures ambient temperature; a wet bulb sensor takes into account evaporative cooling, giving an indication of the effects of humidity on an individual; and a globe sensor provides an indication of the radiant heat exposure on an individual due to either direct light or hot objects in an environment.

QUESTemp° Thermal Environment Monitors convert these measurements to a simplified, single-number Indoor and Outdoor WBGT Index. This index can then be used in conjunction with guidelines developed by ACGIH, U.S. Navy, EPRI, ISO and others. Each of these guidelines includes considerations for real-life variables such as activity levels or clothing types worn. Advanced models of the QUESTemp° Thermal Environment Monitors also compute Humidex. Humidex is another form of a heat stress index used in Canada in accordance with guidelines such as those defined by the Occupational Health Clinics for Ontario Workers-Hamilton (OHCOW). Using QUESTemp° Thermal Environment Monitors in conjunction with any one of these guidelines enables you to determine appropriate work/rest regimens or stay times for workers in situations where heat stress is a life safety and liability risk.

Area heat stress monitors are very valuable for their ability to provide simultaneous protection to groups of workers with a single instrument. The compromise present in area heat stress measurements is that each worker is in reality physiologically unique. Environmental conditions and physical activity that cause heat stress for one worker may not affect another while conditions that do not affect one worker may affect another. The guidelines that exist for stay times and work/rest regimens based on measured WBGT values are generalized to represent the expected impact of given environmental conditions and physical activity on groups of individuals. The results of the WBGT method can include unnecessarily shortened work times for some workers and insufficient protection of others. This is why experts insist that monitoring be used only in conjunction with worker observation and monitoring for heat stress symptoms. For these reasons, we also offer the Questemp°II. This easy-to-use personal heat stress instrument monitors for indications of the onset of heat stress.