WBGT Meter WBGT-302 (For Workplace Health & Safety

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. In an industry-first, it 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 users’ everyday needs.


  • 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.
  • It 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 NameWBGT-302
Intended UseFor use in the workplace/industrial sites
Precision RatingJIS Class 1.5 (*1)
Ingress ProtectionEquivalent to IP65 (*2) (dustproof and water resistant)
Display2.8-inch LCD screen (56mm x 42mm)
Measurement capabilitiesWBGT, 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 capabilityStores the data of up to 30,000 measurements (most recent data saved)
External interfaceUSB Type C
Communication specification (*3)USB connection (USB communication/RS communication)
UART connection
Power sourceAA alkaline batteries
Battery lifeApproximately 6 months (*4)
Dimensions69 (W) x 36 (D) x 272 (L) mm
2.7 (W) x 1.4 (D) x 10.7 (L) inches
WeightApproximately 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 to connect the device.
(*4) Depending on utilized settings, period of active use, usage environments, etc.


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