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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 humidityAir dryness and the risk of the seasonal influenza epidemics
    7 g/m3 and underExtremely dry. The risk is at highest.
    8–11 g/m3Dry. The risk is high.
    12–16 g/m3Wet. The risk is low.
    17 g/m3 and upExtremely 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.

    WBGTType of risks in relation to physical activityRemarks
    Danger
    (31°C or higher)
    Risk during any physical activityRisk 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 activityTake adequate rest regularly when exercising or doing vigorous work.
    Caution
    (25°C or lower)
    Risk during very vigorous physical activityLow 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 nameDigital Thermohygrometer with Guide for Comfortable Environment
    Model namePC-5500TRH
    Measuring rangeTemperature: 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)
    ResolutionTemperature: 0.1°C
    Humidity: 0.1%rh
    Absolute humidity: 1 g/m3
    WBGT index: 1°C
    Operation ambient0 to 50°C, less than 95%rh without condensing or freezing
    Sampling time30 sec.
    DetectorTemperature: Thermistor
    Humidity: Resistive humidity sensor
    Alarm volume65 dB
    MaterialABS resin, acrylic glass
    Dimensions120 (W) x 170 (H) x 25 (D) mm
    Weight280 g including batteries
    PowerAA battery x3
    Battery lifeApprox. 1 year with AA alkaline batteries if a buzzer beeps once a day
    Standard accessoriesAA zinc-carbon battery x3, instruction manual
    Lot size10 per box, 4 boxes per carton