[Ideal for heat stroke prevention! Black ball type WBGT index meter] Equipped with a black ball type sensor that complies with JIS B 7922:2023! Accurately measures temperature, humidity, and WBGT index, and warns of four danger levels with sound and display. Visualizes the risk of heat stroke in factory sites, schools, sports facilities, outdoor activities, etc.
[Product Features] JIS B 7922 compliant Glass 2 accuracy: Safe design that meets Japanese standards. Equipped with a black ball sensor: Accurately measures solar radiation and radiant heat. Automatically calculates WBGT value: Displays in real time in 0.1°C increments. 4 levels of heatstroke alert level - LED and buzzer alert notification. Ultra-lightweight at 79g, easy to carry!
[For safety measures in the following situations] Construction and building sites Factories Schools, kindergartens, daycare centers Elderly care facilities, nursing homes Sports sites Leisure, outdoors Event venues Homes and offices
[Supports a variety of installation methods] Supports belt, bag, arm, tripod, and wall mounting. Carabiner and band (long and short) are included, so you can use it flexibly according to the site environment.
[How is it different from a thermometer?] A typical thermometer can only measure "temperature," but this product evaluates "temperature, humidity, and sunlight (radiant heat)" together and displays the heat danger level (WBGT value). For example, during exercise or outdoor activities, the burden on the body can change greatly depending on sunlight and humidity. The big difference with this product is that it visualizes the "true heat" and can determine the risk of heatstroke.
■ Mandatory measures against heat stroke and the social background
Heatstroke prevention measures will become mandatory for companies starting June 1, 2025. This applies to situations where work is carried out for a certain period of time in an environment with a temperature of 31°C or above or a WBGT of 28 or above. Accidents due to heatstroke are also increasing in schools and welfare facilities, making on-site measures an urgent necessity.
*WBGT (heat index) is an index that focuses on the exchange of heat (heat balance) between the human body and the outside air, and incorporates three factors that have a large impact on the human body's heat balance: humidity, the surrounding thermal environment such as solar radiation and radiation, and temperature.
[What is a black ball?]
The "black ball" allows us to measure radiant heat from sunlight and the ground's glare, quantifying the "heat that the body actually feels."
This makes it possible to grasp the risk of heatstroke both indoors and outdoors, and is useful for safety management during exercise or work.
*Radiant heat: Direct sunlight and reflected heat from the ground, etc.
*The Ministry of the Environment also recommends the "Heat Stroke Index Meter with Black Ball."
[How is it different from a thermometer?]
While a typical thermometer can only measure "temperature," this product evaluates "temperature, humidity, and sunlight (radiant heat)" all at once and displays the heat danger level (WBGT value).
For example, during exercise or outdoor activities, the strain on the body can vary greatly depending on sunlight and humidity.
The big difference with this product is that it makes the "true heat" visible and can assess the risk of heatstroke.
[You can choose the installation method and flexibly adapt to various sites]
Attach to belt
Attach to bag
Wear on arm
Setting up on a tripod
Installing on a wall
【accessories】
Main unit, carabiner, band (short), band (long)
[Safety measures for situations like these]
Construction sites, factories, schools, kindergartens, daycare centers, elderly care facilities, sports sites, leisure and outdoor activities, homes and offices, event venues
[Product specifications (per piece)]
Product name: Black ball heat stroke index meter
Model number: KO392
Standard: JIS B 7922: 2023 compliant
Accuracy classification: Class 2
WBGT
Measurement range: 0.0 to 50.0°C in 0.1°C increments
Accuracy: 15.0 to 40.0°C ±2.0°C
0.0 to 14.9/40.1 to 50.0: ±3°C
Temperature
Measurement range: -9.9°C to 60.0°C in 0.1°C increments
Accuracy: 20.0 to 50.0°C ±0.6°C
-9.9 to 19.9 / 50.1 to 60.0°C ±1.0°C
Humidity (relative humidity) Measurement range: 0.1 to 99.9% in 0.1% increments
Accuracy: 30.0 to 90.0% ±5.0%
10.0 to 29.9/90.1 to 99.9% ±10.0%
Storage environment
Temperature: -10.0 to 60.0°C
Humidity: 0.0 to 100.0% (non-condensing)
Wind speed: 0.3 to 3 m/s
Usage environment
Temperature: 5.0 to 60.0°C
Humidity: 20.0 to 80.0% (non-condensing)
Warning alarm: 3 volume levels: high/low/none
Dimensions: Approx. Width 60 x Height 112 x Depth 33 mm
Mass: Approx. 79g
Country of manufacture: China
