The one choice metabolic system for both laboratory and field testing

  • The K5 is the 4th generation of the most popular wearable metabolic system, a breakthrough in the field of exercise physiology and human performance assessment.

    The K5 is the most innovative and versatile metabolic system ever created. It reaps the benefits of more than 25 years of experience with metabolic systems.

    The extensive list of new and unique characteristics of the K5 expands the scope of metabolic testing from clinical exercise testing to performance assessment.

  • Key Features
    Accuracy and reliability. The K5 uses the latest technology, including COSMED's 4th generation opto-electronic reader and proven and reliable highly linear and rapid response O2 (GFC) and CO2 (NDIR) sensors.

    Intelligent Metabolic Sampling Technology. IntelliMET™ (US Patent 9581539) measures gas exchange either with micro-dynamic mixing chamber or breath by breath techniques. Users can select between the two modes depending on the protocol type, research field or other factors.

    Wireless connectivity. The K5 offers efficient wireless data transmission (both standard Bluetooth and long range Bluetooth) and seamless integration with other devices (i.e., wireless wrist-worn pulse oximeter).

    Metabolic cart test mode. The K5 features include a standard USB port and medical grade AC/DC power plug. These features turn the device into a conventional metabolic cart (PC-controlled via software).

    Advanced wearability. The single-body design (battery inside) reduces weight, simplifies subject setup and improves ergonomics. The new harness (2 sizes) is comfortable and offers freedom of movement during testing. Alternatively, the K5 can be mounted on supports through the integrated tripod mount (1/4”-20 UNC).

    Rugged device designed according to IP54 standard. All plugs, connectors and caps are protected by seals and are water, moisture and dust resistant. Resistive touch-screen technology allows use either with gloves or wet fingers.

    User-accessbile slots. Users can easily access and replace the O2 sensor, Li-ion battery and SD-card (for extra storage capacity).

    Intuitive device user interface. The K5 display assures simplified navigation and quick access to all commands and features. The status bar provides information regarding time, date, battery status, Bluetooth, GPS and notification icons (QC messages, warnings, etc). Also included is the ability to switch between data, graphs, GPS etc, during real-time measurements.

    Metabolic + Kinematic. Synchronize data with integrated 10 Hz GPS and altimeter.

    ANT+ certified. The K5 can be integrated with the world’s largest sport sensors network (up to 5 profiles available for 250+ compatible products). Up to 8 wireless devices can be contemporarily connected with the K5.
  • IntelliMET (Option)

    IntelliMET (Option)

    • Intelligent Dual Metabolic Sampling Technology
    • US Patent 9581539
    • New standard in metabolic measurements by providing a dual gas sampling system able to provide both micro-dynamic mixing chamber and breath by breath gas exchange measurements
    • Users can select gas sampling mode depending on the protocol type, research or other factors
    Long Range Data Transmission (Option)

    Long Range Data Transmission (Option)

    • Bluetooth 2.1 + EDR Class I
    • TX/RX (Transmit and Receive)
    • Up to 1000 m line-of-sight
    ANT+ (Option)

    ANT+ (Option)

    • Wireless technology that allows monitoring devices to communicate each other and integrating and synchronizing data in a single source.
    • ANT+ engine for integration with up to 250 external wireless devices (SRM, CycleOps, Garmin etc.)
    • Up to 8 channels simultaneously
    • Compatible with 5 profiles (Bike Power & Torque, Bike Speed & Cadence, Blood Pressure, HR monitor, Muscle Oxygen Monitor, Stride Based Speed & Distance, Weight Scale).
  • Aquatrainer


    New Snorkel for enhanced breath-by-breath gas analysis during Swimming
    • Improved version of the swimming snorkel kit
    • Breath by Breath data acquisition during swimming (VO2 , VCO2 , VE, HR)
    • Light and hydrodynamic design
    • Ergonomic, waterproof and easily mounted
    • High accuracy and proven reliability; scientifically validated

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    Bluetooth Pulse Oximeter

    Bluetooth Pulse Oximeter

    Continuously monitor SpO2 with K5 through wireless wrist-worn pulse oximeter
    • Versatile and reliable wrist-worn Pulse Oximeter
    • Rugged durability with large display screen
    • Long battery life (24h w/Bluetooth, 48h w/out Bluetooth)
    • Patient recordings capacity (270h with high resolution 1 sec storage rate, 1080h with 4sec storage rate)
    • Secure data transfer via Bluetooth or USB connection
    • Optional software for 6MWT or overnight oximetry reporting
    Stress ECG

    Stress ECG

    Diagnostic quality 12-lead Stress testing ECG in cable or telemetry configuration
    • Resting and Exercise ECG interpretation
    • High resolution ECG processing
    • Full disclosure and scroll back during the test
    • ST segment, ST slopes, Trends
    • Retrospective ECG and arrhythmia analysis available during test
    • Standard and user-defined exercise protocols
    • Integration with COSMED gas exchange equipment
    • Patient database and network compatible

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    Directly connecting to a USB port turns any PC into a spirometer
    • Full spirometry testing (FVC, SVC, MVV, Pre-Post BD, Bronchochallenge)
    • Plug-and-play technology
    • Independently validated turbine flowmeter by LDS Hospital using the ATS 24 standard volume-time waveforms
    • User-friendly, visually appealing software interface providing comprehensive graphical and text interpretation
    • Compatible with Windows 10
    • Full networking (SQL) and multilanguage environment
    • Meet latest ATS/ERS standards

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    Face Mask

    Face Mask

    Multi-use silicone face masks with headgear for comfortable leak-free resting and exercise gas exchange measurements
    • 5 sizes (3 Adult and 2 Pediatric)
    • Available also with inspiratory valve for high performance exercise testing
    • Reusable and easily disinfected for multiple use
    • Anatomical design for leak free and comfortable fit
    • Integrated chin cup for stability
    • Excellent adherence to any face shape
    • Easy to clean and sterilize

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    Metabolic Simulator

    Metabolic Simulator

    Completely designed by COSMED, the Metabolic Simulator provides an important tool that can be used for periodic verification of metabolic systems in both clinical and research settings.

    COSMED metabolic simulator is able to replicate the typical waveform of the respiratory pattern and, by applying the dilution principle, gas exchanges (oxygen consumption and carbon dioxide production).

    • 4-300 L/min Ventilation range
    • VO2 and VCO2 range up to 3900 mL/min
    • Designed by COSMED, compatible with all metabolic devices on the market
    • Reproduction of human breathing profile
    • Adjustable respiratory parameters suitable for both clinical and research purposes
    • Easy and precise quality control

    International guidelines recommend the use of a metabolic simulator to perform a thorough systematic check on the overall performance of a metabolic system.

    With COSMED Metabolic Simulator you will be able to address this recommendation and check that the accuracy of your metabolic system is in line with the declared values.

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