QUESTemp 46 by TSI Quest - Area Heat Stress Monitor

Area Monitoring Datalogging

Heat Stress Manufacturer: TSI Quest

QUESTemp 46 by TSI Quest - Area Heat Stress Monitor

Training
Available

Training

How to use a TSI QUESTemp heat stress monitor

Training

Construction Industrial Hygiene: Recognizing, Evaluating, and Controlling Jobsite Health Hazards

Training

Industrial Hygiene (IH) Field Kit Essentials: A Professional Setup Guide

The TSI QUESTemp° 46 is a portable area heat stress monitor featuring waterless wet bulb technology, eliminating the need for wicks and distilled water maintenance. It measures dry 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 supports ACGIH TLV®, U.S. Navy PHEL charts, U.S. Navy/Marine Corps. flag conditions, and EPRI action limits. Measurement range covers 0–120°C (±0.5°C) for dry bulb and globe, 20–95% RH (±5%), and waterless wet bulb at ±1.1°C expanded uncertainty. Runs on a 9V alkaline battery (~80 hours) with RS-232 serial output. Well-suited for industrial facilities, construction sites, and hot work environments requiring low-maintenance, reliable WBGT monitoring.

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Rental Rates

Daily

$130.00

Weekly

$275.00

Monthly

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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 $4,485.00 / unit

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QUESTemp 46 by TSI Quest - Area Heat Stress Monitor

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Expert support available by phone and email

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Frequently Asked Questions

It's an area heat stress monitor that calculates WBGT (Wet Bulb Globe Temperature) using a waterless wet bulb sensor — eliminating the wick filling and maintenance required by traditional WBGT meters. It's used to set work/rest thresholds in hot industrial, construction, and outdoor environments.

Traditional WBGT meters use a water-soaked wick that requires regular filling, drying time, and contamination management. The QUESTemp 46's waterless sensor calculates wet bulb from RH and temperature, simplifying field deployment and reducing maintenance errors.

It measures dry bulb, globe temperature, and RH to calculate WBGT (indoor and outdoor), Heat Index, and Humidex. Stay-time guidance is based on ACGIH TLV criteria, U.S. Navy PHEL charts, U.S. Navy/Marine flag conditions, and EPRI action limits.

Choose the QUESTemp 46 when wick maintenance is a logistical problem — remote sites, high-frequency use, or crews without consistent water access. Choose the QUESTemp 36 when a traditional natural wet bulb measurement is specifically required by your program or client.

Use the QUESTemp 46 to characterize environmental heat conditions by location and set work/rest protocols. Use a wearable to monitor individual worker physiological strain during those conditions. They answer different questions and work well together.

Measuring in one location and applying the result to the whole site. WBGT varies with shade, proximity to radiant heat sources, and airflow. Place the monitor where workers are actually exposed and document placement conditions.

The QUESTemp 46 monitor, calibration verification module, serial cable and USB adapter, spare 9V battery, software and manuals on flash drive, tools, and carrying case.

$130/day and $275/week. Pricing beyond two weeks is by quote. For seasonal heat stress programs covering multiple months, contact us for a long-term rate — the waterless wet bulb sensor reduces maintenance overhead that would otherwise add cost over extended deployments.

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

Measurement Range:

Dry Bulb & Globe: 0 to 120°C, ±0.5°C accuracy

Relative Humidity: 20–95%, ±5% accuracy
Waterless Wet Bulb: ±1.1°C expanded uncertainty (0–80°C)
Operating Temperature: -5°C to 60°C (electronics), -5°C to 100°C (sensor assembly)
Stay time measurement per ACHIH TLV Handbook, US Navy PHEL charts, US Marine Flag system, and EPRI action limits
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 (~80 hrs)
Data Outputs: RS-232 serial, parallel printer, or via TSI Detection Management Software (DMS)

Kit Contents

QUESTemp° 46 Monitor, Calibration Verification Module, Serial Data Cable, Serial-to-USB Adapter with drivers, Spare 9V Battery, User Manual and Software on flash drive, Flathead Screwdriver, and Carrying Case

Manufacturer Resources

Documents

User manuals, safety guides, and technical documentation from the manufacturer:

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