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KES-QM Warm/Cool Feeling qmax Measurement Tester

KES-QM Warm/Cool Feeling qmax Measurement Tester 

It is a high-precision testing instrument developed by Kato Tech Co., Ltd. of Japan (formerly known as the KES-F7). It is used to quantify the contact cool/warm sensation of textiles, fabrics, and other materials, expressed as the qmax value.


The instrument simulates the instantaneous heat-transfer process that occurs when human skin comes into contact with a material. It is widely used in the research, development, and quality control of cooling fabrics for summer wear, thermal underwear for winter, and bedding products.

  • Standard

    • GB/T 35263-2017 紡織品 接觸瞬間涼感性能的檢測和評價
    • CNS15687, L3272 織物瞬間涼感性能試驗法
    • JIS L 1927 接觸冷感性能的評價方法

  • Product Features

    • qmax Index: Measures the maximum heat flux (qmax) at the instant the human body comes into contact with a material. A higher qmax value indicates a stronger cooling sensation.
    • Simulation of Human Touch: Equipped with a thermal sensing plate that simulates contact between human skin and the material, accurately reproducing the actual tactile sensation.
    • Multiple Testing Modes: Supports both dry and wet testing and can calculate thermal conductivity and heat retention rate.
    • Automation and Accuracy: Equipped with a fully automatic sampler capable of performing up to 10 consecutive measurements in a single run, minimizing human error.

  • Technical SPEC

    Dimensions / Weight (Approx.)
    W330 × D620 × H664 mm / 42 kg

    Power Supply
    AC 100–240 V, 50/60 Hz

    Maximum Power Consumption
    250 W

    Operating Temperature and Humidity
    20–30°C / 50–70% RH, non-condensing. Temperature and humidity must remain constant during measurement.
    Standard conditions: 20°C / 65% RH.
    The installation location must be free from drafts and vibration.

    Measurement Unit Configuration

    • T-Box: 30 × 30 mm
    • Constant-temperature cooling plate: 118 × 118 mm

    Temperature Display

    • Unit: °C
    • Minimum display increment: 0.1°C

    Contact Cooling Sensation Value
    qmax [W/cm²] or [J/cm²·s]

    Number of Automatic Measurements
    1–10 measurements

    Heating Plate Control Method
    PID control combined with proportional voltage output based on the temperature difference

    Temperature Setting Range

    • T-Box: Room temperature to 40°C, adjustable in 0.1°C increments
    • Constant-temperature cooling plate: 10–40°C, adjustable in 0.1°C increments

    Specimen Requirements

    • Area: 180 × 180 mm (standard)
    • Thickness: 25 mm or less

    Touchscreen Display

    • Type: Projected capacitive touchscreen
    • Screen: 7-inch widescreen
    • Resolution: 800 × 480 pixels (WVGA)
    • Active display area: 152.4 × 91.4 mm

    System Settings

    • Stabilization time: 0–60 minutes, adjustable in 1-minute increments
    • Operation sound: ON/OFF
    • Data transfer confirmation screen: ON/OFF

    Measurement Data Review

    • Touchscreen display: Up to 10 × 3 measurements
    • Application software: Up to 30 measurements

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