Digital Thermohygrometer with Guide for Comfortable Environment

Feature

■ Displays a difference between the measured and recommended values of temperature or humidity.

■ In influenza mode, it displays volumetric 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, volumetric 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 volumetric 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 volumetric 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 volumetric humidity?

Volumetric 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, volumetric humidity strongly correlates with seasonal influenza and the epidemic begins when the volumetric humidity is below 10 g/m³.

PC-5500TRH helps your effort to prevent influenza.

Volumetric 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 "Volumetric 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 Volumetric 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 Volumetric 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