No.1079-00
Digital Thermohygrometer
PC-7300GTI
JAN code : 4974425802043
Calibration : Available
JCSS Accredited Calibration : Available
Based on a measured temperature and humidity, this thermohygrometer calculates WBGT index and volumetric humidity to show.
It also converts volumetric humidity into influenza index to notify of the risk in three steps.
With index bars on sides and a WBGT alarm, PC-7300GTI helps maintain the comfort ambient.
■ Overview (Japanese only)
Information
To be released in January 2025
Feature
■ Display
■ WBGT index
Displays a cautious level of heat stress corresponding to WBGT in four steps
| WBGT | Type of physical activity to be warned | Remarks |
| Danger 31°C or more | Any physical activity | Risk of heat stress is high for the elderly, even when they rest. Avoid going out and stay in a cool room. |
| Severe warning 28 to 31°C | Avoid direct sunlight outdoors and watch for any rise in room temperature indoors. | |
| Warning 25 to 28°C | Moderate to vigorous physical activity | Take adequate rest regularly when exercising or doing vigorous work. |
| Caution 25°C or less | Vigorous physical activity | Low in risk basically, but high in risk when doing vigorous exercise or heavy labor. |
* "28 to 31°C" above means 28°C or higher, lower than 31°C
What is WBGT:
WBGT is an acronym of wet bulb globe temperature, which is an index introduced from three elements related to biological heat balance: temperature, humidity, and heat radiation.
PC-7300GTI calculates WBGT from temperature and humidity based on the guideline "Heat Stress Prevention Guidelines for Daily Life Ver. 4" by Japanese Society of Biometeorology.
■ Influenza index
Displays a cautious level in three steps based on volumetric humidity.
| Volumetric humidity (g/m3) | Survival rate of viruses | Environment for viruses | Countermeasures | |
| Danger | Less than 7g | 20% | Suitable for viruses. High risk of infection | Increase temperature and humidity by using a humidifier |
| Warning | Less than 11g | 5% | Viruses can survive. Be cautious of infection | Avoid a decrease in temperature and humidity |
| Safe | Less than 17g | Nearly 0% | Viruses cannot survive | Keep temperature and humidity at a reasonable level |
What are volumetric humidity and influenza index:
Volumetric humidity is mass of water vapor contained in a unit volume of air.
It can be used as a barometer of the probability of epidemics of seasonal influenza according to a report of "Absolute humidity as a deterministic factor affecting seasonal influenza epidemics in Japan" by Makoto Shoji.
■ Temperature, humidity, and their maximum and minimum
Pressing of Max/Min key switches the indication of current temperature/humidity to the maximum and minimum temperature/humidity of the day and the previous day.
| Current temp./humidity | Maximum temp./humidity | Minimum temp./humidity |
| Display example | Today's maximum temp./humidity | Yesterday's minimum temp./humidity |
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At 0:00 midnight today's maximum and minimum data changes to yesterday's data, and the previous yesterday's data is erased automatically.
■ Clock, WBGT, volumetric humidity
Pressing of Mode key changes the indication of clock to WBGT and volumetric humidity in sequence.
| Clock | WBGT | Volumetric humidity |
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| 12-h/24-h notation | Unit: °C | Unit: g/m3 |
■ Can be used as an alarm clock
■ WBGT alarm equipped to alert when it exceeds the set level
Description
■ Caution
Each value of WBGT and influenza indexes is a rough estimation to help consider health management. It does not directly protect you from heat stroke or influenza.
Indicated alerts may vary from an official alert from a government.
Specifications
| Cat. No. | 1079-00 | |
| Product name | Digital Thermohygrometer | |
| Model name | PC-7300GTI | |
| Measuring range | Temp. | −9.9 to 50.0°C |
| Humidity | 20 to 95%rh | |
| Accuracy | Temp. | ±1.0°C (10 to 40°C) ±2.0°C (other) |
| Humidity | ±5%rh (20 to 30°C, 40 to 80%rh) ±8%rh (other) | |
| Resolution | Temp. | 0.1°C |
| Humidity | 1%rh | |
| WBGT | 1°C | |
| Volumetric humidity | 0.01g/m3 | |
| Sampling time | 30 seconds | |
| Detector | Temp. | Thermistor |
| Humidity | Resistive polymeric humidity sensor | |
| WBGT alarm range | Settable in 1°C steps between WBGT 0 and 50°C | |
| WBGT alarm volume | 80 dB | |
| Index bars | Heat stress | Displays WBGT as a cautious level in four steps: Danger, Severe warning, Warning, Caution |
| Seasonal influenza | Displays a cautious level of the spread of influenza inversely proportional to volumetric humidity in three steps: Warning, Caution, Safe | |
| Operation ambient | −10 to 50°C, less than 95%rh without condensing | |
| Power | AAA battery x2 | |
| Battery life | Approx. 18 months under room temperature with alkaline batteries, with alarm activated once per day | |
| Material | ABS resin, acrylic glass | |
| Dimensions | 100(W) x 120(H) x 18(D) mm | |
| Weight | 151 g including batteries | |
| Standard accessories | AAA battery x2, instruction manual | |
* Attached batteries are for test purpose and may last shorter.
* JCSS-accredited calibration is only available for temperature and humidity.
