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
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
Globe, dry bulb temperature, wet bulb temperature, % relative humidity, WGBTin, WGBTout, WGBT weighted average (if 3 sensor sets), and Heat Index / Humidex.
Temperatures given in Celsius or Fahrenheit.
Index (QUESTemp 46 only)
ACGIH TLV, U.S. Navy PHEL Charts, Flag Conditions for U.S. Navy/Marine Corp. Ashore, and EPRI
Records and prints all measurements at user selected interval of 1, 2, 5, 10, 15, 30, or 60 minutes. 128K bytes of data memory.
English, French, Spanish, Italian, German.
Designed 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.
9.2 in. (23.5 cm)
7.2 in. (18.3 cm)
3.0 in. (7.5 cm)
Dimensions include mounted sensor assembly.
2.6 lbs. (1.2 kg) with mounted sensor assembly.
1000 ohm platinum RTD
Integrated circuit with capacitive polymer sensor
Dry Bulb and Globe Temperature
±0.5 C between 0 C and 120 C
Waterless Wet Bulb Temperature
Expanded measurement uncertainty of 1.1 C (k=2) between 0 C and 80 C
±5% between 20 to 95% (non-condensing)
Operating Temperature Range
-5 C to +100 C
-5 C to 60 C
Remote Sensor Bars
2 x 15-pin D-sub jacks are located on the side of the unit for plugging in one or two additional sensor bars by using remote cables up to 200 feet (61 m). The top sensor bar can also be remote with a cable.
9V alkaline, 7.2V NiMH rechargeable pack (charged in the unit), or AC adapter wall power cube (AC adapter will operate the unit or recharge the NiMH battery pack).