FAQ

An ATEX-certified, explosion-proof wireless anemometer designed for hazardous areas, measuring wind speed and direction with long-range transmission.

ATEX stands for “ATmosphere EXplosible.” It is also the name of the European Directive 2014/34/EC, which regulates the market for explosion-proof electrical and mechanical equipment, components, and protective systems.

Intrinsically safe equipment is designed to prevent ignition by limiting electrical or thermal energy under normal or abnormal conditions. This is achieved by reducing the power available to the equipment in hazardous areas to levels incapable of igniting gases, even in their most flammable concentrations. (ISA-RP12.6)

Yes, a one-year warranty from the purchase date. During this period, defective products will be repaired or replaced with a comparable item. The warranty excludes the battery and damages caused by misuse.

Runs on a 3.6V lithium battery for up to 3 years of operation in harsh conditions. The low-power wireless sensor uses 20-30 µA under normal conditions, peaking at 35 mA every 2 sec.

Secure wind sensor to any metal surface using the mounting bracket. Once powered, the portable receiver displays real-time data immediately.

+/- 3% accuracy, with each wind sensor is calibrated and tested before shipping.

Up to 400/1,300 meters (XB model) in open space; with an external antenna, the range extends to 2,000 meters. Actual distance varies with topology and obstacles. Users report vertical transmission up to 500 meters. While harmonic disturbances are theoretically possible, no complaints have been received to date.

No, all E11 units are connected and tested before shipping. Once you receive the E11, simply power on the receiver to view the wind speed readings.

Suitable for various applications, including FPSOs, petroleum refineries, shipbuilding, offshore and onshore sites, HVAC systems, sewage plants, landfills, and the manufacturing industry.

ATEX stands for “ATmosphere EXplosible.” It is also the name of the European Directive 2014/34/EC, which regulates the market for explosion-proof electrical and mechanical equipment, components, and protective systems.

The SL-27 fully charges in under 6 hours.

It operates reliably in temperatures from -20°C to +55°C.

The SL-27 provides effective illumination up to 30 meters.

The TWL is the thermal work limit. It’s an advanced heat stress index and research found it more useful in workplaces.

Yes. The TWL-1S has been tested and validated by the Health Authority – Abu Dhabi in extreme high temperature and humidity conditions in the Gulf region, as well as in Australian mining sites. Thermal Work Limit (TWL) algorithm used in the device is the latest version and has been attested by the research team at Curtin University, Australia.

Thermal Work Limit (TWL) predicts the maximum safe level of work that can be performed in a specific environment without exceeding a core body temperature of 38.2°C (100.8°F) or a sweat rate of 1.2 kg (2.6 lb) per hour. In contrast, Wet Bulb Globe Temperature (WBGT) does not incorporate a direct measure of wind speed and requires estimated metabolic rates, which can have a margin of error of up to 50%.

Additionally, heat stress indexes like WBGT and ISO 7933 do not factor in the effects of prolonged hard work, dehydration, or the impact of personal protective clothing and equipment. WBGT and the heat index are often too conservative and impractical for extreme environments such as the Middle East, high-temperature industrial processes, or mining operations.

Scarlet TWL-1S combines the features of both WBGT and TWL indexes, allowing you to easily switch between heat indices based on your needs.

TWL-1S is ideal for assessing heat-related illness risks in high-temperature environments. Health and safety officers can place the device at “hot spot” zones to continuously monitor environmental conditions.

Because factors like humidity and sun exposure significantly affect how hot your body actually feels. A heat stress meter accounts for all of these, providing a more accurate assessment of environmental heat risk

Since TWL mimics the working environment’s impact on laborers, TWL-1S unit should be placed where most workers are located. For example, if the worksite lacks shade, TWL-1S should be in direct sunlight to reflect actual conditions.

To extend the device’s life, you can keep it in the shade when not measuring. While measuring, place TWL-1S in sunlight and let it stabilize for at least 10 minutes before pressing the TWL button. Once TWL level appears, you can return it to the shade.

TWL stands for Thermal Work Limit, an advanced heat stress index widely recognized for its effectiveness in workplace safety. It has been one of the key measure in heat stress programs at Abu Dhabi.

Because factors like humidity and sun exposure significantly affect how hot your body actually feels. A heat stress meter accounts for all of these, providing a more accurate assessment of environmental heat risk

Yes, the TWL-1SV provides visual heat level alerts directly on the device, and it also supports email notifications through the web portal’s online monitoring settings.

The TWL‑1SV transmits all data to the cloud for remote monitoring on Scarlet’s web portal. It connects to the internet via an RJ45 LAN port. TWL-1SV can also be integrated with PCs or existing systems using a serial port through MODBUS/RS485 communication protocols. This dual connectivity makes it flexible for both online access and local system integration.

There is no limit. You can connect as many TWL-1SV devices as needed for remote monitoring.

Since TWL mimics the working environment’s impact on laborers, TWL-1SV unit should be placed where most workers are located. For example, if the worksite lacks shade, TWL-1SV should be in direct sunlight to reflect actual conditions.

When beginning measurement, let the TWL-1SV stabilize for at least 10 minutes before checking the TWL levels for more precise readings and to allow the device to fully adapt to the surrounding conditions.

No formal training is needed. ST-12D features an intuitive interface, making it easy to use for professionals and beginners alike.

An accurate noise measurement instrument that meets IEC 61672-1:2002 standards (or equivalent standards such as BS EN 61672-1:2003). It has tighter tolerances (+/- 1.9 dB at 1 kHz) compared to Class 2 (+/- 2.2 dB). Class 1 meters are ideal for measuring sound pressure, Leq, and peak sound pressure, often required by regulations like the UK’s Noise at Work.

Your choice depends on the application:

Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements.

Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.

Using a windscreen or weatherproof outdoor kit helps reduce wind noise and ensures accurate readings in outdoor settings.

Yes, Scarlet offers microphone extension cables (available in 2.5m and 5m lengths) that allow the microphone to be positioned away from the meter, ideal for specific monitoring setups.

Yes. ST-12D supports analog outputs and RS-232 serial communication, enabling integration with external systems such as weather stations or environmental monitoring system.

No formal training is needed. ST-15D features an intuitive interface, making it easy to use for professionals and beginners alike.

Audio recording is an optional feature for the ST-15D. When equipped, it can record sound data and save it in WAV format, facilitating further analysis and documentation.

Yes, the ST-15D includes a built-in GPS analyzer. This feature allows the device to record noise source & measurements. Check out this video to learn how to view the GPS information.

An accurate noise measurement instrument that meets IEC 61672-1:2002 standards (or equivalent standards such as BS EN 61672-1:2003). It has tighter tolerances (+/- 1.9 dB at 1 kHz) compared to Class 2 (+/- 2.2 dB). Class 1 meters are ideal for measuring sound pressure, Leq, and peak sound pressure, often required by regulations like the UK’s Noise at Work.

Your choice depends on the application:

Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements.

Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.

No formal training is needed. ST-25D features an intuitive interface, making it easy to use for professionals and beginners alike.

A Class 2 sound level meter meets the accuracy and performance standards defined by IEC 61672 for general-purpose sound measurements.

Your choice depends on the application:

Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements.

Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.

Audio recording is an optional feature for the ST-25D. When equipped, it can record sound data and save it in WAV format, facilitating further analysis and documentation.

No, the GPS analyzer must be requested when placing your order. This feature enables the device to record both noise sources and measurement data. Check out this video to learn how to view the GPS information.

The ST-130 supports A, C, and Z frequency weightings, and Fast, Slow, or Impulse time weightings for accurate noise measurement.

Yes, sampling intervals can be set from 1 second to nearly 24 hours in the ‘Sampling Rate & Auto Record’ setup menu.

The screen will show ‘FULL.’ Connect to a PC, download the data, then erase it using the software to free up space.

The ST-130 supports OSHA, MSHA, DOD, ACGIH, ISO85, ISO90, and user-defined standards for compliance with occupational safety regulations.

Turn on the device and make sure it’s in NDM (Noise Dose Meter) mode. Press the START/PAUSE button to begin measurement. Press STOP when you’re done.

It can log up to 1,000,000 readings in SLM mode, and all readings can be saved, reviewed, and downloaded for analysis.

No formal training is needed. ST-21D features an intuitive interface, making it easy to use for professionals and beginners alike.

A Class 2 sound level meter meets the accuracy and performance standards defined by IEC 61672 for general-purpose sound measurements.

Your choice depends on the application:

Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements.

Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.

Using a windscreen or weatherproof outdoor kit helps reduce wind noise and ensures accurate readings in outdoor settings.

Yes, Scarlet offers microphone extension cables (available in 2.5m and 5m lengths) that allow the microphone to be positioned away from the meter, ideal for specific monitoring setups.

No formal training is needed. We provide complete instruction on how to use the device, please check the user guide.

An accurate noise measurement instrument that meets IEC 61672-1:2002 standards (or equivalent standards such as BS EN 61672-1:2003). It has tighter tolerances (+/- 1.9 dB at 1 kHz) compared to Class 2 (+/- 2.2 dB). Class 1 meters are ideal for measuring sound pressure, Leq, and peak sound pressure, often required by regulations like the UK’s Noise at Work.

Your choice depends on the application:

Class 1: Preferred for environmental noise surveys, low noise levels, legal applications, and standards like ISO 20906:2009 for aircraft sound monitoring.
Class 2: Suitable for less demanding applications without strict accuracy requirements.

Conduct field calibrations before and after each use. Additionally, have the device professionally calibrated annually to maintain compliance with standards.

Using a windscreen or weatherproof outdoor kit helps reduce wind noise and ensures accurate readings in outdoor settings.

Yes, Scarlet offers microphone extension cables (available in 2.5m and 5m lengths) that allow the microphone to be positioned away from the meter, ideal for specific monitoring setups.

Yes. ST-11D supports analog outputs and RS-232 serial communication, enabling integration with external systems such as weather stations or environmental monitoring system.

The ST-591 is a professional-grade personal noise dosimeter designed to monitor occupational noise exposure in industrial and workplace environments. It supports octave band analysis and complies with global safety standards.

Yes. The ST-591 capables to evaluate same measurement with 2 different exchange rate, threshold, and criterion level. This makes it easier to meet two regulations such as OSHA, NIOSH, MSHA, and DOD from a single measurement session.

Yes. The ST-591 has built-in audio recording in WAV format. You can use it to document specific noise events for further analysis. It stores audio and data on 64 GB of internal memory.

Use the free ScarletSound software on your PC to manage data logs, review 1/1 and 1/3 octave band analysis, access recorded audio, and export data for reporting or compliance.

Yes. It includes both 1/1 and 1/3 octave band analysis, allowing for detailed evaluation of the noise spectrum and frequency-specific exposure.

Absolutely. The ST-591 meets IEC 61252-1:2017 requirements and provides reliable performance for international occupational noise regulations.

It runs for up to 10 hours on a full charge—suitable for all-day shifts in industrial environments.

Yes. The ST-591 features IP65-rated housing, offering resistance against dust and water, making it ideal for rugged field use.

WR-3 Plus is a wireless wind speed meter designed for enhanced worksite wind safety by providing real-time wind data and instant alerts.

WR-3 Plus connects wirelessly, eliminating cable concerns; simply attach the wind sensor to any metal surface with the mounting bracket. For step-by-step guidance, watch the installation tutorial video.

No, all WR-3 Plus units are connected and tested before shipping. Once you receive the WR-3 Plus, simply power on the receiver to view the wind speed readings.

Yes, manufacturer and third party lab certificates can be ordered on demand.

Up to 500 meters between sensor and receiver in a direct line of sight. Inside buildings or obstacles in between may decrease the transmission range.

+/- 2% FS accuracy, with each wind sensor is calibrated and tested before shipping.

0.3 to 50 m/s with adjustable resolution between m/s (default), knots, MPH, km/hr.

Sub-1GHz wireless band (with central frequency 868, 915 MHz) between sensor and receiver.

You won’t need to worry about replacing the wind sensor battery for an extended period, it’s powered by a 3.6V lithium battery that lasts up to 3 years. The low-power wireless sensor consumes only 20–30 µA under normal conditions, with a peak of 35 mA every 2 seconds.

Yes, IP67 all-weather protection. Built tough and flexible for industrial installation.

Connect the portable receiver to Windows PC with USB cable and historical data can be export in Excel format. For step-by-step guidance, watch the installation tutorial video.

Yes, user can connect 1 wind sensor to multiple WR-3 Plus receivers within a 500 meters wireless range.

Pair the sensor and receiver using the wireless address labeled on the sensor.

The address is labeled on the sensor body. User can set receiver address by setting menus. All WR-3 Plus were paired and tested before shipping. If the text instruction is still not clear, please visit this video.

Yes, manufacturer and third party lab certificates can be ordered on demand.

Up to 500 meters between sensor and receiver in a direct line of sight. Inside buildings or obstacles in between may decrease the transmission range.

You won’t need to worry about replacing the wind sensor battery for an extended period, it’s powered by a 3.6V lithium battery that lasts up to 3 years. The low-power wireless sensor consumes only 20–30 µA under normal conditions, with a peak of 35 mA every 2 seconds.

Pair the sensor and receiver using the wireless address labeled on the sensor.

The address is labeled on the sensor body. User can set receiver address by setting menus. All WL-21 were paired and tested before shipping. If the text instruction is still not clear, please visit [this video].

WL-21 is a wireless wind speed & direction meter designed for enhanced worksite wind safety by providing real-time wind data and instant alerts.

WL-21 connects wirelessly, eliminating cable concerns; simply attach the wind sensor to any metal surface with the mounting bracket. For step-by-step guidance, watch the installation tutorial video, the steps also apply for WL-21.

No, all WL-21 units are paired and tested before shipping. Once you receive the WL-21, simply power on the receiver to view the wind speed readings.

+/- 2% FS accuracy, with each wind sensor is calibrated and tested before shipping.

±2% FS accuracy with 1° resolution, and each wind sensor is individually calibrated and tested before shipment.

0.3 to 50 m/s with adjustable resolution between m/s (default), knots, MPH, km/hr.

0 to 359°, ensuring complete coverage with no blank sectors.

Sub-1GHz wireless band (with central frequency 868, 915 MHz) between sensor and receiver.

Yes, IP67 all-weather protection. Built tough and flexible for industrial installation.

Connect the portable receiver to Windows PC with USB cable and historical data can be export in Excel format. For step-by-step guidance, watch the installation tutorial video.

Yes, user can connect 1 wind sensor to multiple WL-21 receivers within a 500 meters wireless range.

WindPro provides real-time data and wind speed alerts, enhancing safety and productivity with seamless control system integration.

Secure the wind sensor to any metal surface using the mounting bracket. The WindPro console is powered by an adapter and displays real-time data received from the wind sensor.

Yes, the WindPro console supports up to 4 customizable wind speed alarms and includes a controllable relay switch for activating external devices.

The WindPro console can be integrated with systems that support 4–20 mA analog input, relay control, or RS232 signal communication. Watch our YouTube playlist for the complete tutorials.

No, all WindPro units are connected and tested before shipping. Once you receive the WindPro, simply power on the WindPro console to view the wind speed readings.

Yes, users can connect up to two Scarlet wind sensors to a control console, displaying both data and alerts simultaneously.

Up to 1000 meters between sensor and console in a direct sight. Transmission may reduce with buildings or obstacles in between.

Yes, manufacturer and third party lab certificates can be ordered on demand.

+/- 2% FS accuracy, with each wind sensor is calibrated and tested before shipping.

±2% FS accuracy with 1° resolution, and each wind sensor is individually calibrated and tested before shipment.

0.3 to 50 m/s with adjustable resolution between m/s (default), knots, MPH, km/hr.

0 to 359°, ensuring complete coverage with no blank sectors.

Sub-1GHz wireless band (with central frequency 868, 915 MHz) between sensor and receiver.

Yes, IP67 all-weather protection. Built tough and flexible for industrial installation.

An ATEX-certified, explosion-proof wireless anemometer designed for hazardous areas, measuring wind speed and direction with long-range transmission.

ATEX stands for “ATmosphere EXplosible.” It is also the name of the European Directive 2014/34/EC, which regulates the market for explosion-proof electrical and mechanical equipment, components, and protective systems.

Intrinsically safe equipment is designed to prevent ignition by limiting electrical or thermal energy under normal or abnormal conditions. This is achieved by reducing the power available to the equipment in hazardous areas to levels incapable of igniting gases, even in their most flammable concentrations. (ISA-RP12.6)

Yes, a one-year warranty from the purchase date. During this period, defective products will be repaired or replaced with a comparable item. The warranty excludes the battery and damages caused by misuse.

Runs on a 3.6V lithium battery for up to 3 years of operation in harsh conditions. The low-power wireless sensor uses 20-30 µA under normal conditions, peaking at 35 mA every 2 sec.

Secure wind sensor to any metal surface using the mounting bracket. Once powered, the portable receiver displays real-time data immediately.

+/- 3% accuracy, with each wind sensor is calibrated and tested before shipping.

Up to 400/1,300 meters (XB model) in open space; with an external antenna, the range extends to 2,000 meters. Actual distance varies with topology and obstacles. Users report vertical transmission up to 500 meters. While harmonic disturbances are theoretically possible, no complaints have been received to date.

No, all E11 units are connected and tested before shipping. Once you receive the E11, simply power on the receiver to view the wind speed readings.

Suitable for various applications, including FPSOs, petroleum refineries, shipbuilding, offshore and onshore sites, HVAC systems, sewage plants, landfills, and the manufacturing industry.

WindPro Online monitors live wind data and alerts remotely via WindPro web portal. It is capable of connecting multiple WindPro devices on the portal for seamless management of all wind monitoring projects.

There is no limit. You can connect as many WindPro devices as needed for remote monitoring.

The WindPro console can be integrated with systems that support 4–20 mA analog input, relay control, or RS232 signal communication. Watch our YouTube playlist for the complete tutorials.

Yes, you can upgrade by purchasing the WindPro web portal access. The access is valid for a year, and you can continue renew it.

Yes, you can access our demo site. Visit https://windpro.scarlet-tech.com/login with the following credentials:

Email: demo1@scarlet-tech.com
Password: scar@123

3 people, consist of 1 manager and 2 members. Read the article of How to Access the WindPro Web Portal? for full details.

Yes, you can monitor data and receive audiovisual alerts directly from the WindPro device onsite, ensuring both onsite and remote capabilities.

The all-in-one hook camera providing real-time video feeds to improve crane safety and smooth blind lift operation.

Yes, SV300 uses Starlight hook-camera with full-color and auto-defog, even in low light conditions.

Please refer to HerculesPro, this system supports remote monitoring by including a Cloud Network Video Recorder (NVR), enabling live video feeds to be displayed in your site office.

Up to 300 meters transmission video and data in clear, open spaces.

Yes, the camera is designed for universal compatibility, such as tower crane & mobile crane.

No, SV300 is equipped with strong magnets. For added protection, a safety lanyard is included.

A cutting-edge wireless monitoring solution providing real-time video feeds to improve crane safety and smooth blind lift operation.

Yes, HerculesPro uses Starlight hook-camera with full-color and auto-defog, even in low light conditions.

Yes, HerculesPro supports remote monitoring by including a Cloud Network Video Recorder (NVR), enabling live video feeds to be displayed in your site office.

Up to 1000 meters transmission video and data in clear, open spaces.

Wireless crane hook camera system works well for all types of crane. Some crane types, dealing with heavy duty work and staggering heights such as tower crane, would benefit the most so it is highly recommended to use wireless crane camera system.

Crane hire/rental, construction business, oil and gas extraction, and other industry using heavy-duty crane.

For crane operator: Wireless crane camera system helps crane operator to have an unobstructed view of critical lifting area, so he is able to avoid blind lift. Also, lift faster and safer which also improves productivity and safety, eliminating lifting hazards and fatal injuries.

For manager: Wireless crane camera has Smartphone Remote Monitoring function which enable manager to monitor the status of multiple work sites at once at their choice of time and place, watch live-view from smartphone anytime anywhere.

Yes, HerculesPro allows for up to 4 cameras to be connected and stream them on your screen display.

No, HerculesPro is equipped with strong magnets. For added protection, a safety lanyard is included.

Domestic orders typically ship within 1–2 business days. International delivery varies by destination, usually within 1 week, depending on customs and local handling.

Yes. Once shipped, you’ll receive a tracking number via email to monitor your package in real time.

International shipments may incur customs duties or import taxes depending on your country’s regulations. Scarlet Tech does not control these fees; we recommend checking with your local customs office for details.

Scarlet Tech offers a one-year limited warranty against material or production defects, in accordance with our general sales conditions.

The warranty covers hardware failures due to manufacturing defects. It includes repair or replacement at Scarlet Tech’s discretion.

The warranty does not cover:
▪ Accessories and batteries (not covered by warranty)
▪ Repairs made necessary by improper use or improper combination with incompatible accessories or equipment.
▪ Repairs made necessary by improper shipping material causing damages in transit.
▪ Repairs made necessary by previous attempts for the repair carried out by non-skilled or unauthorized personnel.
▪ Instruments for whatever reason modified by the customer himself without the explicit authorization of our Technical Dept.

Yes. To avoid further damage during transit, it’s recommended to return the product in its original packaging.