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
  • Placeholder

    Reservoir Cover for QUESTemp

    $8.00
  • Placeholder

    Reservoir for QUESTemp

    $23.00
  • Placeholder

    120VAC to 9VDC Transformer/Adapter for QT-32/QT-34/QT-36/QT-44/QT-46/QT-48N, BA-202

    $120.00
  • Placeholder

    2" DIA COPPER GLOBE-PAINT

    $83.00
  • Placeholder

    220VAC to 9VDC Transformer/Adapter for QT-32/QT-34/QT-36/QT-44/QT-46/QT-48N, BA-202

    $145.00
  • Air Probe-9 Air Flow Sensor with (2) NiMH Batteries, 120VAC Dual Charger & storage case. Compatible Monitors are QT-36 or QT-46

    Air Probe-9 Air Flow Sensor with (2) NiMH Batteries, 120VAC Dual Charger & storage case for QT-36 & QT-46

    $2,190.00
  • CD containing Detection Management Software for use with QUEST datalogging products

    CD containing Detection Management Software for use with QUEST datalogging products

    $210.00
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    Digital Oral Thermometer

    $50.00
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    Digital Oral Thermometer Sheaths (box of 100)

    $31.00
  • Placeholder

    Dual 120V AC Charger for AirProbe

    $125.00
  • Placeholder

    Neck Strap for QT-48N only

    $73.00
  • Placeholder

    NiMH Battery & 120VAC Charger for QUESTemp Portable Monitors

    $270.00
  • Placeholder

    NiMH Battery & 220VAC Charger for QUESTemp Portable Monitors

    $280.00
  • Placeholder

    NiMH Battery Pack for QT-32/QT-34/QT-36/QT-44/QT-46/QT-48N

    $225.00
  • Placeholder

    QT-3X Series Replacement Battery Cover for QT-32, QT-34, QT-36, QT-44, QT-46 and QT-48N

    $47.00
  • Placeholder

    QT-3X Series Replacement Dry Bulb Shield Assembly for QT-32/QT-34/QT-36/QT-44/QT-46/QT-48N – consists of (5) shields and (1) cap/cover

    $26.00
  • Placeholder

    Remote Sensor Cable – 100 ft. length

    $305.00
  • Placeholder

    Remote Sensor Cable – 200 ft. length

    $550.00
  • Remote Sensor Cable - 25 ft. length

    Remote Sensor Cable – 25 ft. length

    $210.00
  • Placeholder

    Remote Sensor Cable – 6 ft. length

    $170.00
  • Placeholder

    Replacement E.A.R. expandable foam ear inserts – for temperature sensor insertion – Package of 50

    $62.00
  • Placeholder

    Replacement Earloops – Package of 10

    $57.00
  • Placeholder

    Replacement NiMH Battery for AirProbe

    $145.00
  • Replacement Wick Kit - contains 10 wicks

    Replacement Wick Kit – contains 10 wicks

    $93.00
  • Sensor Alignment Salt at 33% [MgCl (magnesium chloride)] for QT-48N only

    Sensor Alignment Salt at 33% [MgCl (magnesium chloride)] for QT-48N only

    $150.00
  • Sensor Alignment Salt at 75% [NaCL (sodium chloride)] for QT-48N only

    Sensor Alignment Salt at 75% [NaCL (sodium chloride)] for QT-48N only

    $150.00
  • Placeholder

    Serial Computer Cable (RS232 to PC) with 25 to 9 pin adapter for QUESTemp‚ II

    $275.00
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    Serial/Computer Interface Cable (RS-232 9-pin to PC) QUESTemp‚ 34/36/44/46/48N

    $295.00