3M™ QUESTemp™ II Datalogging Personal Heat Stress Monitor

Directly Detects An Individual’s Physiological Heat Response.

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  • Overview
  • Features
  • Specifications
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The QUESTemp II personal heat stress monitor provides an additional level of data by directly detecting the individual’s physiological heat response. User-selected alarm trip points provide an audio alert to workers experiencing elevated core temperatures. This instrument is ideal for applications where individuals face a wide range of heat exposure. It allows safety directors to monitor personal heat stress levels and create heat stress measures that can minimise risk.
The QUESTemp II Single-Unit Kit QTII includes control module, cable to ear sensor, thermoplastic earmold w/ speaker assembly, 10 replacement E.A.R. expandable foam earplugs, 53-287 Digital Oral Thermometer, 53-288 Digital Oral Thermometer Sheaths (box of 100), 58-867 serial RS-232 computer cable and 56-906 storage case.
  • Compact size combined with belt or pocket attachment allows for convenient personal monitoring 
  • E.A.R. “Earlink” earplug covers ear canal sensor providing a comfortable vehicle for measurement and warning if dangerous deep body core temperatures are reached 
  • Minute-by-minute data logging allows for documentation of personal heat exposure 
  • Intrinsic safety certification for monitoring in potentially hazardous locations where heat is often extreme
Specifications for QuesTemp II Personal Heat Stress Monitors
Sensors Thermistor Temperature Sensor Accuracy and ranges: +/-0.1° C (0.2° F) from 32° C to 40° C (89.6° F to 104° F) 
Measurement Parameters
  • Temperature reading: Celsius or Fahrenheit 
  • Time stamping with clock 
  • 10 second data logging intervals 
  • Overall summary data 
  • Detailed time history data 
Mechanical Design
  • IP54 water & dust ingress protection rating 
  • Case (Aluminum): 13 x 6.4 x 2.5 cm (5.1” x 2.5” x 1”) 
  • Weight Housing: 283 g (10 oz) Ear sensor assembly: 4.2 g (0.15 oz) 
Operating Temperature Range Unit: 0° C to 70° C (32° F to 158° F) 
Operating Humidity 0% to 95% (non-condensing) 
Data Management DMS
  • RS-232 serial printer / computer interface 
  • Audio Alert 
Power Source 9V disposable batteries (60 hrs) 
  • Intrinsic Safety UL/CSA standards for Class I groups C & D; Class II groups E, F & G; 
  • Class III temperature code T3C 
  • Electromagnetic conformance: CE Mark 
  • Patent number: 5062432