• clean background
  • worker heat stress
  • wind
  • anemometer
  • A Whole New Experience

    Need to measure heat index? TWL-1S is the answer for Thermal Work Limit and WBGT. Heat Stress Management Like Never Before

    Learn more
  • Noise Hazards at Work

    Noise induced hearing loss is irreversible damage to the ears caused by exposure to high levels of noise. Scarlet ST-109 Class 1 Sound Level Meter complies with IEC 61672-1, ANSI, CNS and JJG international standards to give you reliable measurements.

    Learn more
  • Know Which Way Wind Blows

    In high wind condition, workers are at greater risk of falling from height. To ensure site safety, Scarlet Wireless Anemometer is designed to accurately measure wind speed, in addition to wind direction and gusts.

    Learn more..
  • Safety First

    Creating a safe work environment is critical to the success of your business, and is one of the best ways to retain staff and maximise productivity.

    Read more


Scarlet Tech - A Leading Company in Environmental and Occupational Health Instruments. Scarlet merges medical science and technology, along with the capacity of coordinating international academy to translate research into practice.

Why Scarlet

1We care about safety. We listen to our customers, solving their problems. Our customers stay with us because of our flexibility and excellent support.

2We want to improve occupational safety & health by leveraging wireless and smartphone technology. We deliver tailor-made, state-of-art instrumentation to help our clients focus on their work.


of all our customers are satisfied with our products and services

Read reviews

Our skills

Design and Manufacture
Transfer Research into Practice
Software Develop

State-of-Art Heat Stress Detector

Learn TWL-1S in 1 Minutes

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.

Learn More