No.1051-00
Digital Thermohygrometer with Guide for Comfortable Environment
PC-5500TRH
JAN code : 4974425100170
Calibration : Available
JCSS Accredited Calibration : Available
This thermohygrometer shows WBGT index (heat stress index) or absolute humidity, and a difference between the measured and recommended values. It helps you create a comfortable environment.
Feature
■ Displays a difference between the measured and recommended values of temperature or humidity.
■ In influenza mode, it displays absolute humidity as a measure to prevent seasonal influenza.
■ In heat stress mode, it displays WBGT index (heat stress index) as a measure to prevent heat stroke.
■ Sliding a mode switch changes the mode to heat stress mode or influenza mode.
■ Equipped with LED light and buzzer alerts
■ Use a hook for wall mount, a stand for desktop
■ Influenza mode
In this mode, absolute humidity as a guideline for prevention of seasonal influenza and the difference between the relative humidity of the comfortable environment and the current one are shown. The difference indicates how many percents (%rh) the humidity needs to be increased.
One of four colored icons is displayed based on absolute humidity.
* Comfortable humidity is set as 10 g/m3 regardless of temperature. Note that this threshold is not in a complete safe status but a cautious status.* Humidification may induce condensation or occurrence of molds. Consider stopping the humidification in such case.
* The difference is displayed as 0%rh if the absolute humidity is 10 g/m3 or more.
■ Heat stress mode
In this mode, WBGT index as a guideline for prevention of heat stroke and the difference between the temperature of the comfortable environment and the current one are shown. The difference indicates how many degrees (°C) the temperature needs to be lowered.
One of four colored icons is displayed based on WBGT index.
* Comfortable WBGT index is set as 27°C regardless of humidity. Note that this threshold is not in a complete safe status but a cautious status.
* Heat stroke may occur even in a safer status if you exercise heavily.
* The difference is displayed as 0°C if the WBGT index is 27°C or less.
Description
■ Caution
Each value of a guide to a comfortable environment is a rough estimation to help you consider your health management.
Indicated alerts may vary from an official alert from a government.
■ What is absolute humidity?
Absolute humidity is one of the units for measuring humidity, which is defined as mass of water vapor contained in a unit volume of air.
According to a report by Dr. Makoto Shoji, absolute humidity strongly correlates with seasonal influenza and the epidemic begins when the absolute humidity is below 10 g/m3.
PC-5500TRH helps your effort to prevent influenza.
Absolute humidity | Air dryness and the risk of the seasonal influenza epidemics |
7 g/m3 and under | Extremely dry. The risk is at highest. |
8–11 g/m3 | Dry. The risk is high. |
12–16 g/m3 | Wet. The risk is low. |
17 g/m3 and up | Extremely wet. The risk is at lowest. |
Cited from "Absolute humidity as a deterministic factor affecting seasonal influenza epidemics in Japan", Makoto Shoji et al., 2011
■ What is WBGT index?
WBGT, stands for wet bulb globe temperature, is an index introduced from three elements related to biological heat balance: temperature, humidity, and heat radiation. It is usually calculated from dry bulb temperature, wet bulb temperature, and black globe temperature, which requires professional techniques and devices with a limitation to install them.
PC-5500TRH easily calculates WBGT from temperature and humidity based on a guideline by Japanese Society of Biometeorology.
Make use of this device with WBGT to prevent heat stroke.
WBGT | Type of risks in relation to physical activity | Remarks |
Danger (31°C or higher) | Risk during any physical activity | Risk of occurrence 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) | Risk during moderate to vigorous physical activity | Take adequate rest regularly when exercising or doing vigorous work. |
Caution (25°C or lower) | Risk during very vigorous physical activity | Low in risk basically, but high in risk when doing vigorous exercise or heavy labor. |
Cited from "Heat Stress Prevention Guidelines for Daily Life", Japanese Society of Biometeorology, 2013
Specifications
Cat. No. | 1051-00 | |
Product name | Digital Thermohygrometer with Guide for Comfortable Environment | |
Model name | PC-5500TRH | |
Measuring range | Temperature: 0.0 to 50.0°C Humidity: 10.0 to 95.0%rh Absolute humidity: 1 to 65 g/m3 (calculated value) WBGT index: 0 to 50°C (calculated value) | |
Measurement accuracy | Temperature | ±1.0°C (10 to 40°C) ±1.5°C (other) |
Humidity | ±5%rh (40.0 to 70.0%rh, 20 to 30°C) ±8%rh (other) | |
Resolution | Temperature: 0.1°C Humidity: 0.1%rh Absolute humidity: 1 g/m3 WBGT index: 1°C | |
Operation ambient | 0 to 50°C, less than 95%rh without condensing or freezing | |
Sampling time | 30 sec. | |
Detector | Temperature: Thermistor Humidity: Resistive humidity sensor | |
Alarm volume | 65 dB | |
Material | ABS resin, acrylic glass | |
Dimensions | 120 (W) x 170 (H) x 25 (D) mm | |
Weight | 280 g including batteries | |
Power | AA battery x3 | |
Battery life | Approx. 1 year with AA alkaline batteries if a buzzer beeps once a day | |
Standard accessories | AA zinc-carbon battery x3, instruction manual | |
Lot size | 10 per box, 4 boxes per carton |