TSI QUESTemp 34 – Heat Stress Monitor

TSI QUESTemp 34 Heat Stress Monitor – Workplace Heat SafetyThe TSI QUESTemp 34 Heat Stress Monitor is a rugged, IP54-rated instrument designed to measure heat stress risks in industrial, construction, military, and environmental applications. Using Wet Bulb Globe Temperature (WBGT) analysis, it provides real-time, precise measurements to help prevent heat-related illnesses and ensure compliance with workplace safety standards.
This model features Dry Bulb, Wet Bulb, and Globe Temperature readings, along with a built-in Relative Humidity (RH) sensor. It calculates both indoor (WBGTi) and outdoor (WBGTo) WBGT values, ensuring accurate heat stress assessment. The QT-34 is available with a 2-inch or 6-inch black globe sensor, meeting BS EN 27243 standards for workplace heat safety.
With multiple power options, it operates using a 9V disposable battery (140-hour runtime), an optional NiMH rechargeable battery (300-hour runtime), or mains power for continuous 24/7 monitoring. The optional tri-sensor plug-in assemblies allow for Head-Torso-Ankle WBGT weighting or multi-location monitoring, making it ideal for high-risk heat environments.
Who Should Use the TSI QUESTemp 34?

Industrial & Manufacturing Workplaces – Prevent heat stress in factories, foundries, and warehouses
Military & Emergency Response Teams – Monitor heat risk during training, operations, and field exercises
Construction & Outdoor Work Sites – Protect workers in hot and humid environments
Energy & Utilities Sector – Ensure safety in power plants, refineries, and mining operations
Environmental & Occupational Health Monitoring – Improve workplace safety and comply with regulations

Key Features

Comprehensive Heat Stress Measurements – Monitors Dry Bulb, Wet Bulb, Globe Temperatures, and Relative Humidity (RH) for precise environmental readings.
WBGT Index Calculation – Calculates and displays WBGTi (indoor) and WBGTo (outdoor) values for accurate heat stress exposure assessment.
Rugged, Field-Ready Design – IP54-rated for dust and water ingress protection, ensuring durability in demanding environments.
Multiple Power Options—It operates on a 9V battery (140 hours), NiMH rechargeable battery (300 hours), or mains power for continuous monitoring.
Advanced Heat Stress Indexing – Includes Heat Index and Humidex calculations for a broader understanding of environmental conditions.
Expandable Multi-Sensor System – Compatible with optional tri-sensor plug-ins for Head-Torso-Ankle WBGT weighting or multi-location monitoring.

Measurement Parameters

• Dry Bulb, Wet Bulb, and Globe Temperatures
• Relative Humidity (RH)
• WBGT (Indoor & Outdoor) Index
• Heat Index / HUMIDEX
• Temperature Reading: Celsius or Fahrenheit
• Data Logging Intervals: 1, 2, 5, 10, 15, 30, or 60 minutes

Operating Temperature Range

• Sensor Assembly: -5°C to 100°C (23°F to 212°F)
• Electronics: -5°C to 60°C (23°F to 140°F)

Data Management

• Detection Management Software (DMS) Compatible

Output

• RS-232 Serial Printer / Computer Interface
• Parallel Printer Interface

Power Source Options

• 9V Disposable Battery – 140 hours runtime
• NiMH Rechargeable Battery (Optional) – 300 hours runtime
• AC Power Adaptor for Continuous Operation

Mechanical Features

• IP54 Water & Dust Ingress Protection
• Tripod Mount / Remote Sensor Bar for up to 61m (~200ft) Distance Measurement
• D-Ring with Lanyard Attachment for Hands-Free Monitoring

Physical Dimensions

• Size: 23.4 x 18.3 x 7.6 cm (9.2” x 7.2” x 3”)
• Weight: 1.2 kg (2.6 lbs) with Mounted Sensor Assembly

Compliance & Certifications

• CE Marked
• Complies with BS EN 27243 Standards