JT2011 WBGT Index Meter

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JT2011 WBGT Index Meter

Product ID：CLWDqtOther001

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberJT2011

Brand NameSHIJIJIANTONG

Payment TermsTT，PAYPAL，Alibaba.com Pay

JT2011 WBGT Index Meter
Product Overview
The JT2011 WBGT Index Meter is a high-precision thermal index measurement instrument designed for evaluating heat stress and thermal environments in workplaces and other high-temperature conditions. It measures dry bulb temperature, natural wet bulb temperature, globe temperature and relative humidity, providing comprehensive data for WBGT-based heat stress assessment.
WBGT, or Wet Bulb Globe Temperature, is a widely used heat stress index that considers the effects of air temperature, humidity, air movement and radiant heat. The JT2011 uses digital temperature sensors together with a proprietary 50 mm or 150 mm globe thermometer to provide accurate thermal environment measurements.
The JT2011 uses a conventional water-filled wet bulb temperature sensor for direct wet bulb temperature measurement. The JT2013 is available as an alternative model with a waterless wet bulb sensor for long-term online monitoring without the need to replenish water.
Both models incorporate a relative humidity sensor for real-time humidity measurement and support 50 mm or 150 mm globe configurations for different application requirements. The RS485 communication interface allows the instrument to connect to industrial control systems and external devices and supports measurement data download and export.
The JT2011 complies with relevant Chinese and international standards and can be verified by national metrology institutions.

Key Features
• High-precision WBGT measurement for workplace heat stress assessment
• Simultaneously measures dry bulb, wet bulb and globe temperatures
• Built-in relative humidity sensor for real-time humidity measurement
• Conventional water-filled wet bulb sensor for JT2011
• Optional JT2013 waterless wet bulb version for long-term online monitoring
• Interchangeable 50 mm and 150 mm globe configurations
• Separate sensor assembly and main unit design for convenient sensor replacement
• Three expandable sensor channels for gradient measurement
• Supports simultaneous measurement with up to three WBGT sensor assemblies
• Backlit LCD display for convenient reading
• Rugged integrated housing with dust, water and drop resistance
• User-configurable calibration capability
• Chinese and English menu options
• Adjustable data storage interval from 1 to 60 minutes
• SD card data storage
• RS485 communication interface for industrial equipment integration
• Supports °C and °F units

Working Principle
WBGT is a comprehensive thermal stress index derived from several temperature parameters. It takes into account the combined influence of air temperature, humidity, air movement and radiant heat on the human body.
The JT2011 collects temperature data through multiple temperature sensor channels. The dry bulb sensor measures ambient air temperature, while the wet bulb sensor measures natural wet bulb temperature. The globe thermometer measures the radiant thermal environment through a black globe.
The instrument also uses a built-in relative humidity sensor to monitor ambient humidity. Based on the measured thermal environment parameters, the system provides the necessary data for WBGT assessment.
The 50 mm and 150 mm globe options allow the instrument to be configured for different measurement environments and testing requirements.

WBGT Measurement Parameters
The JT2011 provides measurement of the following environmental parameters:
• Dry bulb temperature
• Natural wet bulb temperature
• Globe temperature
• Relative humidity
• WBGT-related thermal environment parameters
The combination of these measurements provides a more comprehensive assessment of occupational heat stress than air temperature alone.

Applicable Standards
The JT2011 is designed for applications related to the following standards and guidelines:
• GB/T 4200-2008 — Classification of High Temperature Work
• GB/T 17244-1998 — Thermal Environment — Assessment of Heat Stress of Workers Based on WBGT Index
• GB/T 18977-2003 — Ergonomics of the Thermal Environment — Assessment of the Influence of the Thermal Environment Using Subjective Judgment Scales
• GB/Z 2.2-2007 — Occupational Exposure Limits for Hazardous Agents in the Workplace — Part 2: Physical Agents
• GBZ/T 189.7-2007 — Measurement of Physical Agents in the Workplace — Part 7: High Temperature
• ISO 7243:2017 — Ergonomics of the Thermal Environment — Assessment of Heat Stress Using the WBGT Index
• ACGIH guidelines
• EPRI-related requirements
• OSHA-related workplace heat stress applications

Technical Specifications

Parameter	JT2011 / JT2013 Specification
Dry Bulb Temperature Sensor	Range: 0–120°C; Accuracy: ±0.5°C (±0.2°C at 10–40°C); Resolution: 0.1°C; PT1000
Globe Temperature Sensor	Range: 0–120°C; Accuracy: ±0.5°C (±0.2°C at 10–40°C); Resolution: 0.1°C; PT1000
Wet Bulb Temperature Sensor	Range: 0–120°C; Accuracy: ±0.5°C; Resolution: 0.1°C; applicable to JT2011
Relative Humidity Sensor	0–100% RH; Accuracy: ±3% of reading
Data Storage	SD memory card
Display	2.8-inch LCD
Storage Interval	Adjustable from 1–60 minutes
Globe Diameter	50 mm or 150 mm, optional
Sensor Expansion	Up to 3 gradient measurement sets
Sensor Extension Cable	Standard 5 m
Communication	RS485
Language	Chinese / English
Units	°C / °F
Power Supply	4 × AA alkaline or rechargeable batteries / DC 9 V
Dimensions	210 × 65 × 270 mm
Weight	Approx. 1500 g (main unit)

Sensor Configuration
The JT2011/JT2013 can be configured with different sensor assemblies according to the measurement environment.
Dry Bulb Temperature Sensor
• Measurement range: 0–120°C
• Accuracy: ±0.5°C
• Accuracy at 10–40°C: ±0.2°C
• Resolution: 0.1°C
• Sensor type: PT1000
Globe Temperature Sensor
• Measurement range: 0–120°C
• Accuracy: ±0.5°C
• Accuracy at 10–40°C: ±0.2°C
• Resolution: 0.1°C
• Sensor type: PT1000
Wet Bulb Temperature Sensor
The JT2011 uses a conventional water-filled wet bulb temperature sensor.
• Measurement range: 0–120°C
• Accuracy: ±0.5°C
• Resolution: 0.1°C
The JT2013 uses a waterless wet bulb temperature measurement design and is intended for applications requiring long-term continuous monitoring without frequent water replenishment.
Relative Humidity Sensor
• Measurement range: 0–100% RH
• Accuracy: ±3% of reading
• Real-time relative humidity display

Globe Options
The JT2011 supports interchangeable globe configurations:
• 50 mm globe: suitable for applications requiring a compact globe configuration and specific measurement conditions.
• 150 mm globe: suitable for applications requiring a larger standard globe configuration.
The interchangeable globe design allows users to select the appropriate configuration according to the measurement environment and applicable testing requirements.

Gradient Measurement
The JT2011 supports expandable multi-point measurement through three sensor channels.
• Up to three WBGT sensor assemblies can be connected
• Three measurement points can be monitored simultaneously
• Suitable for measuring temperature gradients in different locations
• Standard sensor extension cable length: 5 m
This configuration is useful when thermal conditions need to be evaluated at different heights or positions within the same workplace.

Applications
The JT2011 WBGT Index Meter is suitable for occupational health, industrial safety, environmental monitoring and thermal comfort assessment.
Typical applications include:
• Workplace heat stress monitoring
• High-temperature work environment assessment
• Occupational health and safety monitoring
• Industrial heat exposure measurement
• Thermal environment assessment
• Factory and workshop temperature monitoring
• Outdoor heat stress assessment
• Construction site heat monitoring
• Sports and athletic environment monitoring
• Military and emergency response applications
• Research on human thermal environments
• Environmental ergonomics studies

Application Scenarios
High-Temperature Workplaces
The JT2011 can be used to evaluate heat stress in factories, workshops, foundries, boiler rooms and other high-temperature workplaces.
Occupational Health Monitoring
The instrument provides the thermal environment parameters required for WBGT-based workplace heat stress evaluation.
Industrial Safety Management
RS485 communication allows measurement data to be integrated with industrial control equipment or monitoring systems.
Multi-Point Thermal Environment Measurement
With up to three expandable sensor channels, the instrument can measure WBGT-related parameters at different positions or heights within the same environment.
Long-Term Monitoring
For applications requiring extended unattended monitoring, the JT2013 waterless wet bulb version can be selected to avoid frequent wet bulb water replenishment.

JT2011 vs. JT2013

Feature	JT2011	JT2013
Wet Bulb Sensor	Water-filled	Waterless
Water Replenishment	Required	Not required
Long-Term Online Monitoring	Suitable with water management	Particularly suitable
Dry Bulb Measurement	Supported	Supported
Globe Temperature Measurement	Supported	Supported
Relative Humidity Measurement	Supported	Supported
50 mm / 150 mm Globe	Optional	Optional
RS485 Communication	Supported	Supported
Gradient Measurement	Up to 3 sensor sets	Up to 3 sensor sets

The JT2011 is suitable for conventional WBGT measurement using a water-filled wet bulb sensor, while the JT2013 is better suited to long-term online monitoring where avoiding water replenishment is important.

JT2011 vs. Conventional Temperature Meters

Feature	JT2011 WBGT Index Meter	Conventional Temperature Meter
Dry Bulb Temperature	Supported	Usually supported
Wet Bulb Temperature	Supported	Usually not supported
Globe Temperature	Supported	Usually not supported
Relative Humidity	Supported	Depends on model
WBGT Assessment	Designed for WBGT applications	Usually not available
Heat Stress Monitoring	Supported	Limited
Multi-Point Measurement	Up to 3 sensor sets	Depends on model
Globe Options	50 mm / 150 mm	Usually unavailable
RS485 Communication	Supported	Depends on model
SD Data Storage	Supported	Depends on model

The JT2011 integrates multiple thermal environment measurements into one instrument, providing more comprehensive information for WBGT-based heat stress assessment than a conventional air temperature meter.

FAQ
What is the JT2011 WBGT Index Meter used for?
The JT2011 is used to measure and evaluate thermal environments and workplace heat stress by measuring dry bulb temperature, natural wet bulb temperature, globe temperature and relative humidity.
What does WBGT mean?
WBGT stands for Wet Bulb Globe Temperature. It is a comprehensive heat stress index that considers environmental factors including air temperature, humidity, air movement and radiant heat.
What temperatures can the JT2011 measure?
The dry bulb and globe temperature sensors have a measurement range of 0–120°C. The JT2011 wet bulb sensor also has a range of 0–120°C.
What is the accuracy of the temperature sensors?
The dry bulb and globe temperature sensors have an accuracy of ±0.5°C, improving to ±0.2°C within 10–40°C.
What is the relative humidity measurement range?
The built-in relative humidity sensor measures 0–100% RH with an accuracy of ±3% of reading.
What is the difference between JT2011 and JT2013?
The main difference is the wet bulb sensor. JT2011 uses a conventional water-filled wet bulb sensor, while JT2013 uses a waterless wet bulb measurement design for long-term monitoring without frequent water replenishment.
Can the JT2011 measure multiple locations simultaneously?
Yes. The instrument supports up to three expandable WBGT sensor assemblies, allowing gradient or multi-point thermal environment measurement.
What globe sizes are available?
The JT2011 supports interchangeable 50 mm and 150 mm globe configurations.
Does the JT2011 support data storage?
Yes. Measurement data can be stored on an SD memory card, with a storage interval adjustable from 1 to 60 minutes.
Does the JT2011 support industrial communication?
Yes. The instrument provides an RS485 communication interface, which can be used to connect the instrument to industrial control equipment and other external systems.
Is the JT2011 suitable for workplace heat stress monitoring?
Yes. It is specifically designed for thermal environment and WBGT-related applications and is suitable for occupational health, workplace safety and high-temperature work environment assessment.

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