Why Choose TWL-1S
Compact Design
TWL-1S is designed for all kinds of worksites including mining and construction. All devices have been tested in rigid environment settings.
Smart Device
Our product is based on the scientific research and algorithm, which gives user built-in risk level flags and instruction for work, rest and hydration.
Quickstart Datalogger
Free software allows users to download data on TWL and WBGT; air temperature, humidity, wind speed, globe and wet bulb temperature.
World Class Standards
We ensure every devices with calibration providing accurate and reliable readings. The 3rd Party Certification is available upon request.
Learn TWL-1S in 1 Minute
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.
TWL-1S Heat Stress Monitor
Smart User-Friendly Interface
Automatic Warning (TWL-1SR Model)
Sensor Protection
Smart User-Friendly Interface
Automatic Warning (TWL-1SR Model)
Sensor Protection
Sensor Protection
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.
- Wet Bulb Globe Temperature (WBGT)
- Thermal Work Limit (TWL)
- Globe Temperature
- Dry Bulb Temperature
- Relative Humidity
- Wet Bulb Temperature
- Wind Speed
| Item | Description |
| 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) |
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.
Scenario
Risk assessment for heat-related illness in the worksite is quite essential in high temperature environments. TWL-1S can be applied at outdoor and indoor working environments. For instance, a health and safety officer can place the TWL-1S at the “hot spot” zone in worksite and continuously monitor environmental parameters. With 200 meters transmission distance of wireless signal, the paging system can actively warn safety officers in real time. TWL-1S is able to help managers set work/rest cycle and hydration plans for workers.
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.
Our Clients
What Our Clients Say
TWL-1S's friendly user interface has assisted me a lot in implementing the new occupational heat exposure prevention system in the field. This is one of the key elements to success.
Since Commencing the heat stress management program in November 2013, the project has not had a SINGLE CASE of a heat stress related illness despite air temperatures of 45 degrees.
Companies in Abu Dhabi should comply with EHSMS heat safety standards by adopting thermal work limit (TWL) for risk assessment of heat working environment.