Wet Bulb Globe Temperature Sensor
HSS-100
The Wet Bulb Globe Temperature Sensor(HSS-100) is designed to track real-time heat conditions and prevent heat-related injuries. As an advanced heat stress monitor, it helps organizations implement effective heat stress prevention strategies in compliance with international safety standards.
More than just a wet globe thermometer, it intelligently analyzes work conditions and offers clear guidance on cooling periods and recommended break schedules, promoting safe productivity in hot environments. The Wet Bulb Globe Temperature Sensor ensures regulatory compliance while supporting proactive health and performance management through continuous monitoring.
By continuously measuring environmental parameters using a wet globe thermometer, the system reduces the risk of heat related illness and enhances overall safety for employees working in demanding conditions.
Optimized Break Planning
Analyzes exposure and workload to recommend personalized cooling periods and rest breaks, reducing the risk of heat related illness through effective heat stress prevention.
Real-Time Awareness
Delivers up-to-the-minute status updates and alerts, giving supervisors the insights needed to make fast, informed safety decisions using the wet globe thermometer.
Productivity Protection
Helps maintain safe work rates without compromising performance by balancing environmental stress with proactive recovery strategies.
Regulatory Compliance
Supports adherence to OSHA, ISO, and industrial guidelines with accurate, timestamped data for reporting and audits.
Simple Integration
Compact and wireless-ready, the WBGT monitor installs quickly and fits into existing safety systems with minimal setup.
Team Health Insights
Monitors heat levels across the work environment to help managers ensure safe conditions and prevent overheating.
Data-Driven Decisions
Empowers organizations with accurate environmental data to support planning, training, and operational risk assessments.
Proactive Risk Reduction
Identifies hazardous conditions before they become critical, enabling early intervention and safer work environments.
Potential Applications of WBGT monitor
Construction Sites
Monitors onsite heat stress conditions using the heat stress monitor to prevent heat-related illnesses among workers, ensuring compliance and optimizing work-rest cycles.
Athletic Training Centers
Athletic trainers use the Wet Bulb Globe Temperature to track heat during high-intensity workouts, helping coaches and trainers adjust training loads and recovery periods to avoid heat exhaustion.
Industrial Facilities
Provides real-time WBGT monitor data in high-temperature environments, supporting safe operations, improved productivity, and heat compliance.
Outdoor Event Environs
Ensures safe conditions for both staff and attendees by identifying heat risks early and enabling organizers to implement timely heat stress prevention strategies.
Measured Parameters of heat stress prevention
Humidity and Thermal Radiation
Ambient Temperature
Relative Humidity
Technical Specification of WBGT Sensor
| Main Power | Internal Battery (3VDC, 1550mAh LiMnO2) |
| Current Consumption | 22uA |
| Battery Life | 2 years* @ 5 minute reporting interval *battery life extended with reduced reporting interval |
| Operating Temperature | -20ºC to +70ºC |
| Storage Temperature | -20ºC to +70ºC (Battery Installed) -20ºC to +70ºC (Battery not Installed) |
| Permissible Humidity | 20-85% (operating and storage) |
| Ingress Protection Rating | IP30 |
| Pollution Degree | 2 |
| Altitude | 2000m |
| Thermal Radiation Sensor | PT100 |
| WBGT Temperature | 0°C to +60°C (±0.5ºC accuracy) |
| Dew Point | -35ºC + 49ºC |
| Dry Bulb | -40°C to 105°C (±0.1% accuracy) |
| Temperature Measurement | -30ºC to +75ºC (±0.2ºC accuracy) |
| Humidity Measurement | 0-100% relative humidity (±1.5% accuracy) |
| Housing Material | ABS plastic |
| Physical Dimensions | Height: 132mm / 5.2 inches Width: 88mm / 3.5 inches Depth: 36.6mm / 1.4 inches |
| Weight | 250g |
| Mounting | Magnetic mount |
| Equipment Mobility | Portable or fixed equipmentt |
| Wireless Module | 2.4GHz Bluetooth 5.0 transceiver |
| Communication Range | 250m line of sight |
| Communication Interval | User programmable in 10 second increments |
| Security | AES 128-bit crypto accelerator ECC and RSA public key accelerator (PKA) SHA2 accelerator (full suite up to SHA-512) True Random Number Generator (TRNG) |
| Indicators | Pairing and broadcast (red, green LED) |
| User Interface | 1 push button (device reset and pairing) |
| Alarm Range | User programmable |
| FCC | 2AXVKHSS01 |
| Industry Canada | 26661-HSS01 |
| Safety | CSA C22.2 No. 61010-1-12
UPD1: Jul 2015 UPD2: APR 2016 UPD3: Jun 2023 and AMD 1:2018 UL61010-1 3rd Edition: 2023 |
Measuring Heat Stress Exposure
What is heat stress – It occur when the body works harder to maintain a stable temperature in hot environments. High temperature, humidity, and radiant heat can cause fatigue, dehydration, or heat-related illness. Monitoring these factors ensures worker safety and productivity.
The Wet Bulb Globe Temperature Sensor follows guidelines from the Canadian Centre for Occupational Health and Safety (CCOHS), identifying key factors that influence how workers experience heat stress, including air temperature, humidity, radiant heat, air movement, physical activity, and clothing.
To assess workplace exposure, these environmental and personal factors are combined using the wet globe thermometer index (WBGT). Understanding and managing heat is vital for worker safety, comfort, and long-term performance.
Managing heat is essential for ensuring worker safety and comfort. The sensation of feeling hot or cold can vary based on:
Air temperature
Relative humidity
Radiant heat from nearby hot or cold surfaces
Air movement (breeze or ventilation)
Level of physical exertion
Type of clothing worn
By considering these, employers can accurately evaluate heat risks and implement effective heat stress monitor strategies.
Measured Key Factors
Air temperature
Measured using a standard thermometer, this captures the ambient air conditions in the workplace.
Radiant Heat
The wet globe thermometer measures radiant heat using a sensor inside a black sphere, simulating how the body absorbs heat from sunlight and surrounding surfaces.
Air Movement and Evaporative Cooling
The natural wet bulb thermometer’s moistened wick continuously evaporates water, reflecting cooling potential and airflow efficiency — essential data for any wet bulb globe temperature monitor.
Measurement Process
The black globe thermometer measures radiant heat using a sensor inside a black sphere, simulating how the body absorbs heat from sunlight and surrounding surfaces. It is commonly used to assess heat stress in various environments.
The natural wet bulb thermometer’s moistened wick continuously evaporates water, reflecting cooling potential and airflow efficiency — essential data for any wet bulb globe temperature monitor.
Features of heat stress monitor
24/7 Alarm Notifications:
Continuously monitors heat conditions and sends instant alerts when heat thresholds are exceeded.
Extended Battery Operation:
User-Defined Reporting:
Automatic Data Logging:
Customizable Alarm Limits:
Set heat thresholds based on job roles, locations, or compliance standards to tailor alerts.
Wireless Data Transmission:
Work-Rest Recommendations:
Fast, Scalable Deployment:
Accessible Data:
Real-Time Heat Monitoring with HSS-100
Monitor your facility’s heat conditions with ease using our intuitive E4A IoT Manager Dashboard, a powerful companion to the wet bulb globe temperature monitor.
Instant Heat Detection
The E4A IoT Manager provides real-time monitoring through an intuitive online dashboard for effective heat stress prevention.
Sensor Mapping
Wireless WBGT sensors are mapped onto your facility layout for precise location tracking.
Customizable Maps
Depending on the preference, our team creates either 2D or 3D maps of your facility or work with existing layouts to provide a clear spatial view of your environment.
Sensor Control
Data Analysis
View live and historical heat stress tracker data for trend analysis and insights.
Work Schedule Optimization
It allows you to plan work schedules more accurately, Plan schedules more accurately, optimize rest ratios, and reduce risks of heat stress incidents.
Graphing Capability
Observe trends and identify abnormalities using visual heat analytics.
System Health Insights
E4A IoT Manager
Unlock the full potential of your Wet Bulb Globe Temperature Sensor (HSS-100) with E4A’s IoT Manager—a centralized platform designed to simplify how you manage, monitor, and analyze your heat stress monitor in real time.
Effortless Sensor Onboarding
Deploy and configure HSS-100 units with just a few clicks.
Real-Time Monitoring & Alerts:
View live WBGT readings along with other contributing sensor parameters.
Historical Data Visualization:
Analyze trends across time and locations with intuitive, filterable charts.
Heat Stress Analytics:
Gain insight into environmental risk exposure, and safety compliance through detailed dashboards.
Cloud-Based Access:
Secure, remote access from any device — anytime, anywhere.
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