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Scarlet TWL-1S Heat Stress Meter
In stock

Scarlet TWL-1S Heat Stress Meter

SKU : SCTWL1S
MAKE : SCARLET
MODEL : TWL-1S
AVAILABILITY : IN STOCK
Scarlet
SAR 3,650.00 - SAR 3,650.00
SAR 3,650.00
SAR 3,650.00 - SAR 3,650.00
SAR 3,650.00
(Including VAT)

Scarlet TWL-1S Heat Stress Meter

The SCARLET TWL-1S Heat Stress Meter is a portable thermal safety instrument designed to monitor and evaluate heat stress in both indoor and outdoor working environments. It measures Thermal Work Limit (TWL) and Wet Bulb Globe Temperature (WBGT), along with environmental parameters such as air temperature, humidity, radiant heat, and wind speed. The intuitive color-coded display, audible alarm, and built-in data logger enable HSE professionals to make informed decisions on work-rest cycles, hydration plans, and worker safety in hot environments. It is ideal for construction sites, oil & gas facilities, mining, utilities, ports, and other industrial workplaces.

Key Features

  • Measures TWL (Thermal Work Limit) and WBGT (Wet Bulb Globe Temperature) in a single device.
  • Monitors air temperature, globe temperature, wet bulb temperature, relative humidity, and wind speed.
  • Tri-color LCD backlight (Green, Yellow, Red) for instant heat risk assessment.
  • 90 dB audible alarm alerts users when heat stress reaches dangerous levels.
  • Provides work-rest cycle guidance and hydration recommendations.
  • Built-in data logger with USB connectivity for exporting historical data to a Windows PC in Excel format.
  • High-accuracy sensors with 2-second measurement intervals for fast environmental monitoring.
  • Compact, lightweight, and portable design for field applications.
  • Replaceable sensor protection filters for improved durability in dusty environments.
  • CE certified and equipped with SGS-certified temperature and humidity sensors.
  • Scientifically validated for use in extreme hot climates, including the Gulf region and mining environments.
  • Suitable for construction, oil & gas, petrochemical, mining, ports, airports, utilities, and industrial safety applications.

Temperature Sensor

Range: 0 to 60°C

Temperature Accuracy

±0.6°C

Humidity Sensor

Range: 5 to 95% RH

Humidity Accuracy

±3% (25°C, 10–90% RH); ±5% (others)

Globe Bulb Temperature (Indoor)

0 to 80°C

Indoor Globe Bulb Accuracy

±1.0°C (15–40°C); ±1.5°C (others)

Globe Bulb Temperature (Outdoor)

0 to 80°C

Outdoor Globe Bulb Accuracy

±1.5°C (15–40°C); ±2.0°C (others)

Wind Speed

0.5 to 10 m/s

Wind Speed Accuracy

±(2% of reading + 0.2) m/s

WBGT (Indoor)

0 to 66°C

WBGT (Outdoor)

0 to 64°C

TWL Calculation

Based on Tw, Tg, Ta and Wind Speed

Safe Maximum Core Temperature

< 38.2°C

Display

32 × 50 mm LCD

Power Supply

4 × AA batteries (6V)

Battery Life

120 hours

Dimensions

59 × 37 × 316 mm

Weight

330 g

Enclosure

ABS

Compliance

CE

Logger Memory

2,000 readings

Alarm

85 dB @ 10 cm

Operating Temperature

-10 to 60°C

Standard Accessories

Tripod, Pager, AA Battery, AAA Batteries, USB Cable, Toolbox, Conformity Certificate, User Manual

Optional Accessory

Humidity Calibration Kit

Storage Condition

25°C Indoor

TWL-1S Datasheet : Download

1. What is the SCARLET TWL-1S used for?
It measures heat stress conditions to help protect workers in hot environments.

2. What parameters does it measure?
It measures air temperature, humidity, globe temperature, and wind speed, and calculates WBGT and TWL.

3. Where can the TWL-1S be used?
It is suitable for construction sites, mining, manufacturing plants, outdoor work, and industrial facilities.

4. Does it provide heat stress warnings?
Yes, it features visual backlight indicators and an audible alarm for high heat stress.

5. Can it log measurement data?
Yes, it has a built-in data logger that stores up to 2,000 readings.

6. Is the device portable?
Yes, it is lightweight, battery-powered, and supplied with a tripod and carrying case.

7. How is the device powered?
It operates on four AA batteries with up to 120 hours of battery life.

8. Does the TWL-1S require calibration?
Yes, annual calibration is recommended to maintain measurement accuracy.

9. Can the data be transferred to a computer?
Yes, data can be downloaded using the included USB cable and Scarlet software.

10. What industries commonly use the TWL-1S?
Construction, mining, oil & gas, manufacturing, utilities, and other industries where heat stress monitoring is essential

Scarlet TWL-1S Heat Stress Meter

The SCARLET TWL-1S Heat Stress Meter is a portable thermal safety instrument designed to monitor and evaluate heat stress in both indoor and outdoor working environments. It measures Thermal Work Limit (TWL) and Wet Bulb Globe Temperature (WBGT), along with environmental parameters such as air temperature, humidity, radiant heat, and wind speed. The intuitive color-coded display, audible alarm, and built-in data logger enable HSE professionals to make informed decisions on work-rest cycles, hydration plans, and worker safety in hot environments. It is ideal for construction sites, oil & gas facilities, mining, utilities, ports, and other industrial workplaces.

Key Features

  • Measures TWL (Thermal Work Limit) and WBGT (Wet Bulb Globe Temperature) in a single device.
  • Monitors air temperature, globe temperature, wet bulb temperature, relative humidity, and wind speed.
  • Tri-color LCD backlight (Green, Yellow, Red) for instant heat risk assessment.
  • 90 dB audible alarm alerts users when heat stress reaches dangerous levels.
  • Provides work-rest cycle guidance and hydration recommendations.
  • Built-in data logger with USB connectivity for exporting historical data to a Windows PC in Excel format.
  • High-accuracy sensors with 2-second measurement intervals for fast environmental monitoring.
  • Compact, lightweight, and portable design for field applications.
  • Replaceable sensor protection filters for improved durability in dusty environments.
  • CE certified and equipped with SGS-certified temperature and humidity sensors.
  • Scientifically validated for use in extreme hot climates, including the Gulf region and mining environments.
  • Suitable for construction, oil & gas, petrochemical, mining, ports, airports, utilities, and industrial safety applications.

Temperature Sensor

Range: 0 to 60°C

Temperature Accuracy

±0.6°C

Humidity Sensor

Range: 5 to 95% RH

Humidity Accuracy

±3% (25°C, 10–90% RH); ±5% (others)

Globe Bulb Temperature (Indoor)

0 to 80°C

Indoor Globe Bulb Accuracy

±1.0°C (15–40°C); ±1.5°C (others)

Globe Bulb Temperature (Outdoor)

0 to 80°C

Outdoor Globe Bulb Accuracy

±1.5°C (15–40°C); ±2.0°C (others)

Wind Speed

0.5 to 10 m/s

Wind Speed Accuracy

±(2% of reading + 0.2) m/s

WBGT (Indoor)

0 to 66°C

WBGT (Outdoor)

0 to 64°C

TWL Calculation

Based on Tw, Tg, Ta and Wind Speed

Safe Maximum Core Temperature

< 38.2°C

Display

32 × 50 mm LCD

Power Supply

4 × AA batteries (6V)

Battery Life

120 hours

Dimensions

59 × 37 × 316 mm

Weight

330 g

Enclosure

ABS

Compliance

CE

Logger Memory

2,000 readings

Alarm

85 dB @ 10 cm

Operating Temperature

-10 to 60°C

Standard Accessories

Tripod, Pager, AA Battery, AAA Batteries, USB Cable, Toolbox, Conformity Certificate, User Manual

Optional Accessory

Humidity Calibration Kit

Storage Condition

25°C Indoor

TWL-1S Datasheet : Download

1. What is the SCARLET TWL-1S used for?
It measures heat stress conditions to help protect workers in hot environments.

2. What parameters does it measure?
It measures air temperature, humidity, globe temperature, and wind speed, and calculates WBGT and TWL.

3. Where can the TWL-1S be used?
It is suitable for construction sites, mining, manufacturing plants, outdoor work, and industrial facilities.

4. Does it provide heat stress warnings?
Yes, it features visual backlight indicators and an audible alarm for high heat stress.

5. Can it log measurement data?
Yes, it has a built-in data logger that stores up to 2,000 readings.

6. Is the device portable?
Yes, it is lightweight, battery-powered, and supplied with a tripod and carrying case.

7. How is the device powered?
It operates on four AA batteries with up to 120 hours of battery life.

8. Does the TWL-1S require calibration?
Yes, annual calibration is recommended to maintain measurement accuracy.

9. Can the data be transferred to a computer?
Yes, data can be downloaded using the included USB cable and Scarlet software.

10. What industries commonly use the TWL-1S?
Construction, mining, oil & gas, manufacturing, utilities, and other industries where heat stress monitoring is essential

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