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LSI Lastem HeatShield - WBGT Thermal Comfort Meter

Occupational Safety and Environmental Measuring Instruments

LSI Lastem HeatShield WBGT thermal comfort and heat stress meter
LSI Lastem HeatShield WBGT thermal comfort and PMV PPD meter
LSI Lastem HeatShield WBGT thermal comfort and air velocity measurement probe

Thermal Comfort and Heat Stress Measurement: WBGT (ISO 7243) – Heat Index & Humidex – PMV/PPD (ISO 7730, ESV126 optional) – Post-analysis support for PHS (ISO 7933) and IREQ/Dlim (ISO 11079) with GIDAS TEA (optional). Cold Stress Measurement

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Product Specifications

  • Standards-Compliant Thermal Comfort Measurement - Additional Cold Measurement Function
    HeatShield is a complete system compliant with international standards. Real-time ISO 7243-compliant WBGT measurement and ISO 7730*-compliant PMV/PPD measurement can be performed. It features probe design and performance compliant with ISO 7726. Compliant with Heat Index, Humidex, ISO 7933, and ISO 11079 calculation standards. In addition to warm environments, it can calculate cold environment thermal stress, as well as additional ISO indices for PHS, IREQ, and duration limits.

  • All Calculations with Superior Software
    With the HS Manager software supplied with the instrument (included), measurements are downloaded to PC, and limits/warnings and reports are generated. For advanced thermal environment analyses, data can be transferred to GIDAS TEA (optional) software; here, indices such as ISO 7730 (PMV/PPD), ISO 7933 (PHS), and ISO 11079 (IREQ/Dlim) can be analysed post-measurement.

  • Capability to Operate Even in Harsh Field Conditions
    In addition to its compact and portable design, HeatShield is a highly robust instrument and can be used in arduous working conditions both indoors and outdoors.

  • Long Battery Operating Time
    HeatShield can operate for up to 200 hours in standard WBGT measurement with its internal rechargeable Li-ion battery. The manufacturer's current product literature specifies up to 20 hours of operation with wireless satellite modules. Since the ESV126 air velocity probe draws external power, operating time is significantly reduced; field planning of approximately 8 hours should be considered a safe practical baseline.

  • Wireless Operation Advantage
    Models with integrated radio technology provide simultaneous monitoring at different locations or heights using up to 2 wireless satellite modules. Line-of-sight coverage of up to 300 m can be achieved in open areas (subject to indoor environmental conditions).


*According to the ISO 7730 standard, metabolic rate (met), clothing insulation factor (CLO), and mechanical efficiency (ETA) values must be entered separately for PMV-PPD calculation. This information can be entered directly on the instrument or edited post-measurement via optional advanced software.

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Technical Specifications

Technical reference: manufacturer data sheet MW9002-ENG-00 (04.03.2026). Battery operating time varies depending on operating conditions and connected accessories.

Product Videos

NOVEL · HeatShield WBGT and Thermal Comfort
NOVEL · HeatShield WBGT and Thermal Comfort · Watch on YouTube ↗
NOVEL · HeatShield Box Contents
NOVEL · HeatShield Box Contents · Watch on YouTube ↗
NOVEL · HeatShield Setup and Operation
NOVEL · HeatShield Setup and Operation · Watch on YouTube ↗

Technical Specifications

Instrument, Logging, and Communications
IndicesIndoor/outdoor WBGT, WBGT Eff, WBGT Ref, Heat Index, and Humidex; optional ESV126 and individual evaluation inputs required for PMV/PPD
Data acquisition / loggingMeasurement every 10 seconds; 1 second for air velocity; 1-minute average logging
Memory8 MB
SoftwareHS Manager included; GIDAS TEA optional for advanced analysis
PC connectionRS232 via USB adapter; radio link is for satellite modules
BatteryRechargeable lithium; up to 200 hours on manufacturer product page, up to 20 hours with radio/satellite use
Radio rangeUp to 300 metres line of sight outdoors; dependent on indoor building conditions
Operating limits−20…+60 °C
Ingress protection / weightIP54; main module 1.4 kg
Globe options5 cm or 15 cm; depending on model and measurement method
Dry Bulb Temperature
SensorSilicon bandgap
Range−20…+60 °C
Accuracy±0.3 °C; ±0.4 °C at 10 °C and 40 °C; ±0.8 °C at 60 °C
Resolution0.1 °C
Natural Wet Bulb Temperature
SensorPt100 Class AA
Range−20…+60 °C
AccuracyMain module ±0.3 °C at 25 °C; satellite module ±0.5 °C
Resolution0.1 °C
Globe Temperature
SensorPt100 Class AA; 5 cm or 15 cm globe
Range−20…+120 °C
AccuracyMain module ±0.3 °C at 25 °C; satellite module ±0.5 °C
Resolution0.1 °C
Relative Humidity
SensorCapacitive
Range0–100% RH
Accuracy±1.8% RH in 10–90% RH range
Resolution0.1% RH
ESV126 Optional Air Velocity Probe
PrincipleHot wire
Measurement range0.1–20 m/s; range specified in detailed probe data sheet
AccuracyAt 10…30 °C, 1013 hPa, and 0…300° yaw angle: ±0.06 m/s for 0.1…0.4 m/s; ±0.08 m/s for 0.4…3.0 m/s; ±3.5% of reading for 3.0…20 m/s
Resolution0.1 m/s
Directional sensitivity300° arc; must not be interpreted as full 360° omnidirectionality
ComplianceISO 7726; manufacturer specifies an exception for probe directional sensitivity
Measurement and Standards Approach
The ISO 7243 WBGT approach should be taken into account in heat stress assessment; ISO 7726 should be taken into account for thermal environment measurement principles. In thermal comfort studies, ISO 7730 is evaluated according to the application, whereas in cold stress, the relevant IREQ methods are evaluated separately. Globe diameter, sensor placement, and measurement duration must be selected in compliance with the method used.

Sectors

Occupational Health, Occupational Hygiene and EnvironmentIron & Steel, Metals and MiningPower and InfrastructureConstruction and Civil EngineeringAgriculture, Food and BeverageAutomotive and Transportation
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Frequently Asked Questions

Which indices does HeatShield measure?The instrument displays WBGT, WBGT Eff, WBGT Ref, Heat Index and Humidex values. PMV/PPD assessment can be performed using the ESV126 air velocity probe.
Are 5 cm and 15 cm globe options available?Yes. The HeatShield range includes models with 5 cm and 15 cm black globe sensors; model selection should be made according to the application and relevant regulations.
What do the wireless satellite modules provide?Radio-enabled models support up to two satellite modules, enabling simultaneous measurement at different locations or heights and facilitating Head-Torso-Ankle weighted WBGT assessment.
What is the battery operating time?The manufacturer's current product information specifies up to 200 hours of operation for standard use and up to 20 hours for wireless satellite/radio operation. When the ESV126 air velocity probe is connected, power consumption increases, noticeably reducing field operating time.
What is the difference between HS Manager and GIDAS TEA?HS Manager is supplied with the instrument for data download, evaluation and reporting. GIDAS TEA is optionally available to support more advanced thermal environment analyses, such as PMV/PPD, PHS and IREQ/Dlim.
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Notice: The technical information, product specifications and images on this page are based on manufacturer publications. The manufacturer may change specifications without notice. For current specifications or assistance in selecting a suitable product for your application, please contact NOVEL at info@novel.com.tr .

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