JantyTech
Handheld WBGT Index & Heat Stress Meter
with Thermal Wind Speed measurement
(Model No.: JT2020-2/3)

For Occupational Health and Safety Measurement

JT2022 is a hand-held portable WBGT index instrument. The professional industrial design structure and appearance ensure the overall high quality of the product. The sensor can be disassembled independently. The 50mm diameter copper Globe is used to further improve the overall portable performance of the instrument. The sensor connection uses aviation connector, which is firm and stable and not easy to shake. The instrument screen uses LED display with backlight, humanized interface and easy to read. It can display wbgtin, wbgtout values, Ta, Tg, Tnw, RH and WBGT measurement curves.

Black bulb temperature (TG) Natural wet bulb temperature (TN)
Ambient (dry bulb) temperature (TA)
Relative humidity (RH) (not involved in WBGT calculation, display and screen reference values)
Based on the above measurements, jt2020-2 can calculate:
WBGT (in) index, i.e. wet bulb black bulb temperature index (in case of no solar radiation)
WBGT (out) index, i.e. black bulb wet bulb temperature index (when there is solar radiation)

WBGT, also known as the temperature index of wet bulb and black bulb, is a basic parameter to evaluate the heat load of human contact working environment. WBGT shows an index that is related to the metabolism of specific jobs that produce heat intensity.

WBGT index is composed of three parts: natural wet ball TNW, black ball TG and dry ball ta (sometimes).

The calculation formula is as follows:
Without solar radiation indoors and outdoors: WBGT = 0.7tnw + 0.3tg

In case of outdoor solar radiation: WBGT=0.7Tnw+0.2Tg+0.1Ta

Where TNW = natural wet bulb temperature TG = black bulb temperature
TA = dry bulb temperature / air temperature

Features:

• 50mm Globe diameter, handheld host, easy to carry
• The built-in humidity sensor displays the relative humidity at the same time
• Professional omnidirectional wind speed sensor
• Real time measurement curve display, intuitive view of WBGT change trend
• Built in high-capacity SD-card, which can record massive measurement data
• Built in lithium battery with standby time up to 9 days (screen off)

Executive Satnadard:

• GBZ/T 189.7-2007, GB/T 934-2008, IS0 7243-2017, ACGIH EPRI, OSHA
• ISO 7730, GB/T 18049-2000

Specifications:

• Thermal windspeed sensor:
  • Range: 0.05 ~ 10m/s
  • Accurancy: +/-(0.03 m/s + 2% of reading)
  • Acquistion frequency: <10Hz
• Air temperature sensor:
  • Range: 0℃ ~ 120℃
  • Resolution: 0.1℃, 0.1℉
  • Accurancy: +/- 0.5℃ (0.3℃ @10℃~40℃)
• Globe temperature sensor:
  • Range: 0℃ ~ 120℃
  • Resolution: 0.1℃, 0.1℉
  • Accurancy: +/- 0.5℃ (0.3℃ @10℃~40℃)
• Wet bulb temperature sensor:
  • Range: 0℃ ~ 120℃
  • Resolution: 0.1℃, 0.1℉
  • Accurancy: +/- 0.5℃ (0.3℃ @10℃~40℃)
• Relative humidity sensor:
  • Range: 10% ~ 90%RH
  • Accurancy: +/-3%RH
• Instrument storage: SD Card
• Display: 3.5-inch LCD screen
• Storage interval: Adjustable from 20 sec to 60 min
• Black globe size: Diameter 50mm
• Power supply: Built-in lithium battery 5000mAh, standby time 9 days
• Meter Dimension: 175 x 92 x 38mm
• Meter Weight: 350g
• Data-interface: micro USB
• Software: JTSOFT-MT
• Language: English/Chinese
• Use environment: -10℃ ~ 60℃; 0-95%RH
• Storage environment: -20℃ to 60℃; 0-95%RH

Standard Package:

• JT2020 Multi-function measuring instrument
• 2020-11 Black bulb temperature probe - 50mm black ball
• 2020-12 Nautal wet bulb temperature probe
• 2020-16 Dry bulb Temperature & RH probe
• 2020-21 Omnidirectional wind speed sensor probe
• User Manaul
• USB cable and software
• Hard carry case