Made heat stress management easyHeat Stress Monitor

TWL 1 s

Scarlet Tech

Designing portable instruments

Founded in 2011, Taipei, Taiwan

scarlet.com.tw

Connecting to international academy

Fusing medical knowledge and technology taste

Coordinate local manufactures to implement the design

TWL 1 sMeasure Environment

Calculate Heat Index&

Measure Environment

Web bulb temperature (Tw)

Air temperature (Ta)

Globe temperature (Tg)

Wind speed (WS)

Sample parameters

TEMP FELTTEMP

WBGT TWL

Calculate Heat IndexGive scientific-based index

Mandatory

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

4 Sensors

GLOBE RH%

TEMP WIND

Globe TemperatureSmall 3” black ball, for portable

Range 0...80℃Accuracy ±1.0℃ (15...40℃)

Built-in correction factor for standard 6”

Reach 90% equilibrium in 7 min

Relative HumidityCapacitive sensor, small and responsive

Range 5...95%rh

Accuracy ±3% @ (10...90 %rh) 25℃

Capacitive sensor 140pF±40pF

Responsive. Took 12 sec from 10% to 80%

Air TemperatureSmall size, industrial spec

Range 0...60℃Accuracy ±0.6℃

NTC type thermistor

Beneath globe. Prevent from radiation heat

Wind SpeedWind cup. No worries about wind direction

Range 0.5...10 m/s

Accuracy ±(2% reading + 0.2) m/s

Wind tunnel lab calibrated

Optical method (IR) to read out RPM

indoor

4 Calculations

WETBULB WBGT

WBGToutdoor

TWL

indoorWBGT

WBGToutdoor

WBGT

The US Army proposed WBGT in 1957

Comply with ISO 7243, ACGIH TLV, ISO 7730

WBGT indoor = 0.7 x Tw + 0.3 x Tg

Wet Bulb Globe Temperature

WBGT outdoor = 0.7 x Tw + 0.2 x Tg + 0.1 Ta

everything in one deviceBest solution

four sensors

wet bulb measure RH: 5-95% accuracy 0.1%

calculator

globe 0-80℃, accuracy 0.1℃

Wind 0.5-10 m/s, accuracy 0.1 m/s

Dry bulb 0-50℃, accuracy 0.1℃

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

tableZone Risk Level Cycle (min)

TWL ≥ 140 Low Continuous*

115 ≤ TWL < 140 Medium Continuous*

TWL < 115 High 20 work - 40 rest

dashboardBest solution

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

3-color LCD backlight R/Y/G indicates risk levelRisk icons is readable alternative in sunlightOn screen timer is helpful for safety manager to schedule work-rest cycle based on TWL value

innovative display

data loggerBest solution

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

logger TWLIT

For research purposeFor build up database of forecastConfigurable sample rate: 10 min to 4 hr/dataStandard mini USB connector

PC software to download data and setup device Download data in zero click. SimpleConfigure device nameConfigure sampling rateExport CSV for Excel analysis

210

255

300

12.06 12:36 13:06 13:36

TWL RH (normalized)

sensor protectionBest solution

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

protect rh sensor

Polypropylene (PP) film allows vapor going through but blocks fine dust and dirt. So vapor and moisture reach sensor but particles don’t. This design is to extend the life of sensor in harsh environment.

Protect anemometer bearing

A silicone pad clamped on top of the plate of wind miller plate. This prevents the bearing inside of the structure from dust and other particles.Compare to competitors, this effectively extends the sensor life.

calibration & partsServices

© Scarlet Tech Co. Ltd. 2013 www.scarlet.com.tw +886 2 2325 7712

humidity wind cup

>> Calibration Should calibrate every 6 months. Local agent or clients can do it.

>> PartsPp filter is suggested to be replaced every 2 to 4 weeks in heavy usage. By order.

Dry/globe bulb

>> Calibration Calibration drift of thermistors are negligible. No need to calibrate.

>> PartsBlack ball along with thermistor is replaceable. By order.

>> Calibration Local calibration is not feasible due to wind tunnel costs.

>> Quick checkHold device and walk 5 meters in 10 sec and make sure the cups keep rotating.

>> PartsWind cup and bearing is replaceable. By order.

Free PC Software

Portability is Considered

EN 61326-1:2006(IEC/EN61000-4-2 (2009)/

-3 (2006 + A2:2010)) Electrical Equipment for

Measurement, Control and Laboratory Use

Certification

Middle East includes Abu Dhabi, Dubai, Oman, Iran, KSA. Australia and New Zealand

Region Industry

Construction, oil and gas, open-cut mining, aluminum ,glass, forest management, cement, transportation, government

Our Customers

Brand

Our Customers

Customer VisitingWe visited 100+ companies in 18 months

ConstructionReach 50 °C in summer.

Risk assessment is mandatory and essential

Abu Dhabi Municipality

Safety in the heat conference. Scarlet was invited and had a

booth

Plastic PlantIntroduction and training

Dubai, UAEWorld Expo 2020

Introduction and training

Road ConstructionIntroduction and training

Mall Beside F1 Track

Cement Plant

Metal Manufacture

Cable FactoryReach 60 °C @ 2 meter. Heat risk assessment is

mandatory

ImprovementValidation

Increase ventilation in the site