QUESTemp 44
TSI Quest QUESTemp 44
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.
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
| Measurements | 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. | ||
| Data Logging | Records and prints all measurements at user selected interval of 1, 2, 5, 10, 15, 30, or 60 minutes. 128K bytes of data memory. | |
| Languages | English, French, Spanish, Italian, German. | |
| Housing | 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. | |
| Size | Height | 9.2 in. (23.5 cm) |
| Width | 7.2 in. (18.3 cm) | |
| Depth | 3.0 in. (7.5 cm) | |
| Dimensions include mounted sensor assembly. | ||
| Weight | 2.6 lbs. (1.2 kg) with mounted sensor assembly. | |
| Sensor Types | Temperature | 1000 ohm platinum RTD |
| Humidity | Integrated circuit with capacitive polymer sensor | |
| Accuracy | 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 | |
| Relative Humidity | ±5% between 20 to 95% (non-condensing) | |
| Operating Temperature Range | Sensor Assembly | -5 C to +100 C |
| Electronics | -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. | |
| Power Options | 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). | |
| Battery Life | 9V alkaline | 80 hours |
| Rechargeable Nickel Metal Hydride | 160 hours | |
| (Adding additional sensor bars reduces battery life.) | ||
| Charge Time (NiMH Battery Pack) | 16 hours (charge in the unit) | |
| Air Probe Accessory | Range | 0-20 meters per second. 0.1 m/s increments |
| Sensor | Omni directional heated thermistor | |
| Accuracy | ±(0.1 m/s + 4%) of measurement value | |
| Battery Life | 6-8 hours for fully charged NiMH battery | |
| Charge Time | 9 hours | |
| Measurement Parameters | QT°44 | QT°46 | QT°48N |
|---|---|---|---|
| Dry bulb, wet bulb and globe temperatures | + | + | + |
| Air Velocity | optional | ||
| 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) | optional | optional |
