WBGT Meter
WBGT-302 (For Workplace Health & Safety)

The WBGT-302 is a light and portable WBGT Meter, suitable for heat stress risk assessment on the go or at the worksite.
Packed with functions and features, it is a top-of-the-line WBGT analyzer. It has a simple, yet elegant design with a focus on easy operability, and in an industry-first, achieved conformity to the industry-leading standard “JIS B 7922” (Measurement of WBGT with a Digital Analyzer) as a “Class 1.5” instrument for measurement precision.
The device is dustproof and water-resistant for peace of mind, rated to the equivalent of IP65.
Functions such as data transfer and onboard memory are also available to meet the common needs of users.



  • Can measure Wet Bulb Globe Temperature (WBGT), perfect for preventing heat stress-related illness at work/industrial settings
  • Can measure Globe Temperatures up to 80°C, suitable for extremely hot industrial environments
  • The light and portable instrument can be battery-operated, letting you measure WBGT anytime, anywhere
  • Has a built-in temperature alarm and can save up to 30,000 measurements worth of data
  • The device is dustproof and water-resistant for peace of mind, rated to the equivalent of IP65
  • The device has a USB Type-C port for data transfer and for providing external power from a PC or portable battery charger* (as an alternative to using AA batteries)

*only use a portable charger that has compatibility with a low power consumption mode

WBGT & Safe Work Intensity


Model Name WBGT-302
Intended Use For use in the workplace/industrial sites
Precision Rating JIS Class 1.5 (*1)
Ingress Protection Equivalent to IP65 (*2) (dustproof and water resistant)
Display 2.8-inch LCD screen (56mm x 42mm)
Measurement capabilities WBGT, ambient temperature, relative humidity, globe temperature
Measurement range
& (display resolution)
WBGT: 0.0°C - 50.0°C (displayed to nearest 0.1°C)
Ambient Temperature: 0.0°C - 50.0°C (displayed to nearest 0.1°C)
Relative Humidity: 10.0% - 90.0%RH (displayed to nearest 0.1%RH)
Globe Temperature: 0.0°C - 80.0°C (displayed to nearest 0.1°C)
*under a natural draft (0.3 to 3 m/sec)
WBGT: ±1.5°C (15°C - 40°C)
Ambient Temperature: ±0.6°C (20°C - 50°C)
Relative Humidity: ±3.0% (30% - 90%RH)
Globe Temperature: ±0.6°C (20°C - 60°C)
Memory capability Stores the data of up to 30,000 measurements (most recent data saved)
External interface USB Type C
Communication specification (*3) USB connection (USB communication/RS communication)
UART connection
Power source AA alkaline batteries
Battery life Approximately 6 months (*4)
Dimensions 69 (W) x 36 (D) x 272 (L) mm
2.7 (W) x 1.4 (D) x 10.7 (L) inches
Weight Approximately 230 g/8.1 oz (battery weight included)

(*1) Sensor accuracy is based on the JIS B 7922 stipulation (Japanese Industrial Standards).
(*2) Devices confirmed to have IPX5-equivalent water resistance at time of shipment.
Use as recommended in the user manual. Damage due to liquids is not covered by warranty.
(*3) Please use the specified cable for connection to the device.
(*4) Depending on utilized settings, period of active use, usage environments, etc.

Operation manual(Download)


JIS B7922 Electronic Wet-bulb globe temperature (WBGT) index meter



■WBGT Meter WBGT-301 302

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