Scarlet - Model TWL-1S - Smart Heat Stress Detector
From Heat Stress Meter
Scarlet TWL-1S is designed to measure WBGT and thermal work limit (TWL) heat index. The TWL measures air temperature, humidity, radiant heat and wind speed to come up with instructions for work, rest and hydration plan. We integrate the algorithm of TWL and work-rest schedule based on the latest guideline. The user-friendly interface even showed different colors to ensure users in line with TWL schedule. For example, red means unsafe for work, yellow means buffer zone and green means safe for work.
Key Features
- Compact design: Ideal for all worksites, including mining and construction. Tested in rigid environment settings.
- Smart device: Scientifically researched and algorithm-based. Provide risk level flags and instruction for work, rest and hydration.
- Quick start data logger: Free software to download TWL and WBGT data.
- World Class Standards: Calibrated for accurate and reliable readings. 3rd party certification available upon request.
Measurements
- Wet Bulb Globe Temperature (WBGT)
- Thermal Work Limit (TWL)
- Globe Temperature
- Dry Bulb Temperature
- Relative Humidity
- Wet Bulb Temperature
- Wind Speed
User-Friendly Interface
Colorful LCD backlight tells you the risk level based on the TWL value. Work-rest schedule and fluid intake are integrated into the display. A countdown timer shows the time remaining before a recommended rest.
Sensor Protection
Delicate temperature and humidity sensor are well protected by a replaceable polypropylene (PP) filter in a solid shield, exempted the sensors from dust damage and external strike. A silicone pad protects the mechanism of anemometer from dust.
Data Recording
TWL-1S can record data with configurable sampling rate from 10 minutes to 3 hours. PC side software automatically convert data into CSV format and helps download the data for further analysis using other analytical tools, and it also synchronizes the date and time of the device with PC.
Optimized Globe
TWL theory considers mean radiant temperature (MRT), the most important parameter on human energy balance. The smaller the surface area of the black bulb, the greater the effect of the air temperature and velocity is, thus causing inaccuracy. The 7.5 cm globe bulb is the optimal size based on our research.
All-Direction Wind Cup
Cup anemometer captures winds from any direction. You do not have to manually decide the wind direction before measuring the wind speed. Compared to the impeller, wind cup is not restricted to the direction of the wind. It considers all the horizontal components of winds that move the anemometer.
Automatic Warning (TWL-1SR Model)
The working timer starts counting according to TWL value. When it expired, the device will notify the pager carriers remotely. It reminds you to take actions. 433 MHz technology is used to offer better penetration ability and 200 meter coverage in an open area is achieved. Please note that pager is available in TWL-1SR model.
Data Sheet
- Air Temperature: Range 0…60 °C / Accuracy ±0.6 °C
- Globe Bulb Indoor: Range 0...80 °C / Accuracy ±1.0 °C (15...40 °C); ±1.5 °C (others)
- Globe Bulb Outdoor: Range 0...80 °C / Accuracy ±1.5 °C (15...40 °C); ±2.0 °C (others)
- Relative Humidity: Range 5...95 %rh / Accuracy ±3% (at 25 °C; 10...90 %rh) ±5% (others)
- Wind Speed: Range 0.5...10 m/s / Accuracy ±(2% of reading + 0.2) m/s
- Dimensions: Body 59 x 37 x 316 mm (w x d x h). Wind cup (top view) diameter 182 mm
- Operating range electronics: -10…60 °C
- Accuracy at 23 ±5 °C: ±1.0 %rh / ±0.2 K
- Power supply / consumption: 4 AAA 3V battery, power supply 6 mA consumption without lighting
- Probe protection: Polypropylene plastic cage
- Measurement interval: 2 seconds
- Data logger: Yes. Min data rate 1 min up to 60 min, 2,000 data.
- Connection Interface: Mini USB (UART)
- Calibration / adjustment: Scarlet calibration kit
- Wireless Connection (Optional): 433 MHz (TWL-1SR Model)
Scientific Validation
The TWL-1S has been tested and validated by Health Authority – Abu Dhabi in the extreme high temperature and high humidity Gulf region as well as the mines in Australia. The TWL algorithm used by TWL-1S device is the latest version attested by the research team in Curtin University, Australia.
Certification
The TWL-1S Heat Stress Detector is certified by CE mark following the EN 61326-1:2006 Electrical Equipment for Measurement, Control and Laboratory Use.
TWL-1S Heat Stress Detector has also received a third party certification for its temperature and humidity sensors from SGS, a globally renowned company for inspection, verification, testing and certification.
Use Cases
This is The Way to Heat Safety
Health, safety and environmental protection are among the fundamental concerns of Bauer in Abu Dhabi and they are top priorities for Scarlet.
We Value Customer Success
Scarlet TWL-1S Heat Stress Detector was applied in Al Fara’a General Contracting (AFGCO) project in downtown Abu Dhabi.
Safety at Worksites
Specialist services in Dubai used TWL-1S to ensure health and safety of people, contractors and others stakeholders.
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