QUESTemp 48N

TSI Quest QUESTemp 48N

The QUESTemp° 44/46/48N utilizes a waterless wet bulb sensor designed for working environments where daily instrument upkeep is difficult.

A high-quality humidity sensor and proprietary algorithm perform the calculation of the Wet Bulb Globe Temperature (WBGT) values, eliminating the hassle of daily wet bulb maintenance.
  • Utilizes WBGT sensing technology; the standard for heat stress management
  • Waterless wet bulb sensing technology eliminates daily maintenance
  • Convenient stay time parameters per multiple standards help determine work-rest ratios
  • IP 54 ingress rating helps protect unit from exposure to dirt, dust, oil and water
  • Designed to withstand the rigors of everyday use in demanding environments
MeasurementsGlobe, dry bulb temperature, wet bulb temperature, % relative humidity, and WGBT Index.
Temperatures given in Celsius or Fahrenheit.
Index (displayed stay time with selected index)ACGIH TLV, U.S. Navy PHEL Charts, Flag Conditions for U.S. Navy/Marine Corp. Ashore
Data LoggingData logging mode records and prints all measurements at user selected interval of 1, 2, 5, 10, 15, 30, or 60 minutes.
Event logging mode (1 second record) 128K bytes of data memory.
LanguagesEnglish, French, Spanish, Italian, German.
SensorsDry Bulb Sensor1000 Ohm Platinum RTD
Accuracy and Ranges±0.5 from 0 C to 120 C (±0.9 F from 32 F to 248 F)
Waterless Wet Bulb (Humidity) Sensor
Accuracy and RangesExpanded measurement uncertainty of 1.1 C (k=2) between 0 C and 80 C (32 F and 176 F)
Globe Sensor1000 Ohm Platinum RTD
Accuracy and Ranges±0.5 from 0 C to 120 C (±0.9 F from 32 F to 248 F)
Relative Humidity SensorIntegrated circuit with capacitive polymer sensor
Accuracy and Ranges±5% from 20 to 95% (non-condensing)
Operating Temperature RangeSensor Assembly-5 C to +100 C
Electronics-5 C to 60 C
HousingDesigned water resistant to a light rain or mist. If rain is frequent, best practice would be to remote the sensor bar and keep the instrument sheltered.
SizeHeight9.2 in. (23.5 cm)
Width7.2 in. (18.3 cm)
Depth3.0 in. (7.5 cm)
Dimensions include mounted sensor assembly.
Weight2.6 lbs. (1.2 kg) with mounted sensor assembly.
Remote Sensor BarUsing a cable, the top sensor bar can be setup for remote measurements, up to 200 feet (61 m).
Power9V alkaline
Battery Life9V alkaline80 hours
Measurement ParametersQT°44QT°46QT°48N
Dry bulb, wet bulb and globe temperatures+++
Air Velocityoptional
WBGT (indoor index)++
WBGT (outdoor index)+++
Heat index / HUMIDEX++
Temperature reading: Celsius or Fahrenheit+++
Data logging intervals: 1, 2, 5, 10, 15, 30 or 60 minutes+++
Event logging mode+
Time & date stamping with clock and calendar+++
Displayed stay times: ACGIH TLV, U.S. Navy PHEL charts, U.S. Navy/Marine Corp. Ashore Flag Conditions, EPRI action limits (QT°48N excludes EPRI)++
Head-Torso-Ankle Weighted Average WBGT (optional with tri-sensors)optionaloptional