QUESTemp 36 by TSI Quest - Area Heat Stress Monitor

Area Monitoring Datalogging

Heat Stress Manufacturer: TSI Quest

QUESTemp 36 by TSI Quest - Area Heat Stress Monitor

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How to use a TSI QUESTemp heat stress monitor

The TSI QUESTemp° 36 is a portable area heat stress monitor for occupational and environmental heat stress assessments. It measures dry bulb, natural wet bulb, globe temperature, and relative humidity, calculating WBGT (Wet Bulb Globe Temperature) indoors and outdoors along with Heat Index (U.S.) and Humidex (Canada). Stay time guidance helps manage work/rest regimens based on ACGIH TLV®, U.S. Navy PHEL charts, and EPRI action limits. Measurement range covers 0–120°C (±0.5°C) for temperature and 20–95% RH (±5%), with remote sensor support up to 200 ft (60 m). Runs on a 9V alkaline battery (up to 140 hours) with RS-232 serial output and compatibility with 3M Detection Management Software. Well-suited for industrial facilities, construction sites, athletic events, and hot work environments requiring OSHA- or ACGIH-based heat management programs.

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$130.00

Weekly

$275.00

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Used Equipment: This equipment has been previously used and tested. It may show signs of wear but is fully functional and inspected.

Price $130.00 for 1 Day $4,350.00 / unit

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QUESTemp 36 by TSI Quest - Area Heat Stress Monitor

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It's an area heat stress monitor that calculates WBGT (Wet Bulb Globe Temperature) to support work/rest decisions in hot environments. WBGT captures the combined effect of air temperature, humidity, radiant heat, and airflow — a far more accurate measure of heat risk than air temperature alone.

Dry bulb temperature, natural wet bulb temperature, globe temperature, and relative humidity. From these it calculates WBGT (indoor and outdoor), Heat Index, and Humidex.

It provides stay-time guidance based on ACGIH TLV criteria, U.S. Navy PHEL charts, and EPRI action limits — the three most commonly referenced frameworks in industrial heat stress programs.

The QUESTemp 46 uses a waterless wet bulb sensor, eliminating the wick maintenance (filling, drying, contamination) required by the QUESTemp 36's traditional wet bulb. If field maintenance is a friction point, the 46 simplifies deployment. Both calculate WBGT and provide the same guidance outputs.

Use the QUESTemp 36 for environmental heat conditions by location to set work/rest thresholds. Use a wearable when you need worker-specific physiological strain. Many programs use both: the area monitor sets the protocol, wearables catch individual outliers.

Measuring in one location and applying results to the whole site. WBGT varies with shade, radiant heat sources, and air movement. Place the monitor where workers are actually exposed and document conditions with each reading.

The QUESTemp 36 monitor, calibration verification module, serial cable and USB adapter, spare battery, software and manuals on flash drive, and carrying case.

$130/day and $275/week. Pricing beyond two weeks is by quote. Most heat stress monitoring programs run for the duration of hot-weather work seasons — a weekly or quoted rate is almost always more economical than daily for any sustained deployment.

Exposure Hazards This Equipment Detects

PEL TWA

N/A

REL TWA

N/A

TLV TWA

N/A

PEL TWA

N/A

REL TWA

N/A

TLV TWA

N/A

Features & Capabilities

Calibration Certificate Available:	✓ Yes
Datalogging:	✓ Yes
Monitoring Scope:	Area Monitoring

Equipment Specifications

Relative Humidity (RH):
Range: 20–95% RH (non-condensing)
Accuracy: ±5%

Humidex:
Calculated from dry bulb temperature & RH
Valid range: 70–109 °F (21–43 °C) and 20–99% RH

Wet Bulb Globe Temperature (WBGT):
Indoor WBGT = 0.7WB + 0.3G
Outdoor WBGT = 0.7WB + 0.2G + 0.1DB
Used with stay time guidance (ACGIH TLV, U.S. Navy PHEL, EPRI)

Dry Bulb Temperature (DBT):
Range: 0–120 °C
Accuracy: ±0.5 °C

Key Specs:

Relative Humidity: 20–95% RH, ±5% (non-condensing)
Temperature: 0 to 120°C, ±0.5°C
Operating Temperature: -5°C to 60°C (electronics), -5°C to 100°C (sensor assembly)
Measurements up to 200 feet (60m)
Size/Weight: 9.2 in (23.5 cm) H × 7.2 in (18.3 cm) W × 3.0 in (7.5 cm) D; 2.6 lbs (1.2 kg)
Power Options: 9V alkaline (140 hrs), NiMH rechargeable pack (300 hrs), or AC adapter
Data Outputs: RS-232 serial, parallel printer, and compatibility with 3M Detection Management Software (DMS)

Kit Contents

QUESTemp° 36 Monitor, Calibration Verification Module, Serial Data Cable, Serial-to-USB Adapter with drivers, Spare 9V Battery, User Manual & Software on flash drive, Flathead Screwdriver, Water Bottle with distilled water, Spare Wicks (2), and Carrying Case

Manufacturer Resources

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