Heat Stress Monitors

Heat Stress & Thermal Envirornment Monitors

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 and Questemp°III . These easy-to-use personal heat stress instruments monitor an individual’s heart rate and/or body temperature for indications of the onset of heat stress.

The rugged, easy to use QUESTemp° 32 Thermal Environment Monitor quickly and accurately evaluates the potential for individuals to experience heat stress.

It combines WGBT index values with Relative Humidity measurements to calculate Humidex and Heat Index.

For remote applications the QT°32 can be tripod mounted with the detachable sensor tethered at a distance up to 200 ft (60m) from the main unit.

The QUESTemp° 34 is a rugged, easy to use, datalogging Thermal Environment Monitor.

The QUESTemp° 34 is the datalogging version of the QT32 Thermal Environment Monitor.

Output recorded data directly to a serial printer or download to QuestSuite Professional software, "The System Solution" for storage, retrieval, analysis, reporting, and charting of all your heat stress monitoring data.

The datalogging QUESTemp° 36 is the premier monitor within the QUESTemp° Series of Thermal Environment Monitors.

The QUESTemp° 36 further simplifies heat stress management efforts by providing users with realtime guidance on stay times and work/rest regimens. Guidance is based on screening criteria for heat stress as defined in the ACGIH TLV Handbook,U.S. Navy PHEL Charts and EPRI Action Limits.

The QUESTemp° 36 eliminates the need to carry paper charts, pocket guides and look-up tables into the field.

An optional detachable probe for measuring air velocity extends the applications for the QUESTemp° 36 beyond traditional heat stress measurements. The QUESTemp° 36 can be used as an indoor thermal comfort monitor using the air velocity probe, temperature and RH sensor readings simultaneously.

Other applications include verification of air flow in fume hoods or rooms normally requiring a minimum amount of air flow to be safe for occupancy.

The QUESTemp° II personal heat stress indicator monitors an individual’s body temperature for indications of the onset of heat stress. It warns the user when their personal body temperature has risen above the "safe" level and that action should be taken to allow the body to cool.

The QUESTemp° II is a belt or pocket worn device with a thin, flexible cable leading up to a small earmold containing the sensor and a small speaker. An E.A.R.® foam earplug slides over the sensor providing a comfortable vehicle for inserting and maintaining the sensor. The speaker and earmold remain just outside of the ear to completely avoid any possible damage or injury to the ear canal.

Output recorded data directly to a serial printer or download to QuestSuite Professional software, "The System Solution" for storage, retrieval, analysis, reporting, and charting of all your heat stress monitoring data. QuestSuiteProfessional allows powerful correlations to be developed between environmental conditions, physical activity, clothing types and real physiological impact on an individualized basis.

The QUESTemp° III is a datalogging Personal Heat Stress Monitor. Based on extensive research funded by the Electric Power Research institute and performed by Westinghouse Electric and Pennsylvania State University, it monitors both body temperature and heart rate to calculate individual body strain in response to heat stress.

It uses a two-stage audio/visual alarm. The first stage "Warning Alert" indicates that conditions are approaching a level where there is a limited amount of time to work. The second stage "Action Alert" indicates that the worker should stop work immediately and take necessary actions.

The watertight lightweight monitor assembly can be slipped into a shirt pocket or clipped to a belt while the elastic sensor belt assembly is worn comfortably around the chest. It is programmable for the appropriate age group and clothing type of the individual being monitored.

Heart rate, temperature, and heat strain alert status are recorded once every minute and stamped with the date and time to correlate events and pinpoint problems.

Output recorded data directly to a serial printer or download to QuestSuite Professional software, "The System Solution" for storage, retrieval, analysis, reporting, and charting of all your heat stress monitoring data.

 
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