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    • Home
    • Environmental Sensors
      • Humidity Sensors
        • Digital Humidity Sensor SHT4x (RH/T)
        • Digital Humidity Sensor SHT3x (RH/T)
        • Digital Humidity Sensor SHT85 (RH/T)
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        • Temperature Sensor STS3x
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      • CO2 Sensor STC31

        The most efficient way to measure high CO2 concentrations

        The STC31 is a chip-sized gas concentration sensor for high range, accurate CO2 measurements designed for high-volume production. The sensor is based on a revolutionized thermal conductivity measurement principle, which results in superior repeatability and long-term stability. This makes the STC31 the perfect choice for applications where reliability is key.

        More

    • Flow Sensors
      • Liquid Flow Meters
        • Lx – Compact Liquid Flow Meters
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      • Mass Flow Meters for Gases
        • Mass Flow Meter SFM3000
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      • Evaluation Kit SEK-Flow Sensing
      • Product Highlight

        Evaluation kit for the single-use liquid flow sensor LD20-2600B

        The LD20-2600B single-use liquid flow sensor for fast, precise and reliable measurements of the lowest flow rates in biomedical applications was successfully launched three years ago. The evaluation kit for this OEM liquid flow sensor can now also be purchased online via Sensirion's distribution network.

        Read more

    • Markets
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      • Our Markets

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        Experts for Smart Sensor Solutions

        Sensirion's sensors are used in a wide range of markets and different applications. Our high-quality environmental and flow sensors and sensor solutions improve energy efficiency and sustainability. They increase our safety, support our health and raise the quality of life. 

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        Sensirion Worldmap

        Sensirion Worldwide

        Founded in 1998 Sensirion has become the leading manufacturer of flow and environmental sensors solutions. The company now employs people in various countries such as the USA, South Korea, Japan, China, Taiwan, and Germany. The headquarters in Switzerland is responsible for research, development, and production. 

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    • Sensirion Medical Proximal Flow

      Proximal Flow Sensors

      For Medical Applications

    • Home
    • Flow Sensors
    • Mass Flow Meters for Gases

    Proximal Flow Sensors

    The SFM3300 and SFM3400 mass flow meters are sensors for proximal flow measurement in respiratory applications. Proximal flow sensors are widely used in respiratory devices for intubated patients and non-invasive ventilation patients in hospitals, home care situations and emergency rooms. With applications ranging from neonatal to adult care, the associated requirements for proximal flow sensors are both diverse and challenging.


    Proximal Flow Sensor for Neonatal Applications

    The SFM3400 flow sensor is a proximal flow sensor for neonatal and pediatric applications in respiratory devices such as ventilation or anesthesia. The sensor is available as a single-use version (SFM3400-D) and a reusable version (SFM3400-AW). 

    • For neonatal and pediatric applications
    • Flow range ± 33 slm (bidirectional)
    • Dead space < 1 ml

    Autoclavable and Single-Use Proximal Flow Sensor

    Sensirion Mass Flow Meters SFM3300 3200 Kombi

    The SFM3300 mass flow meter is a sensor for proximal flow measurement in respiratory applications such as ventilation or anesthesia. There are two versions available: the SFM3300-AW is autoclavable and washable and the SFM3300-D is single-use.

    • For adult applications
    • Flow range ± 250 slm (bidirectional)
    • Dead space < 10 ml

    Features

    • Fully calibrated
    • Very fast update time (0.5 ms)
    • Best-in-class accuracy
    • Robust and shock resistant
    • Designed for proximal flow measurements (medical applications)
    • Medical cones for pneumatic connection to standard breathing circuits
    • Mechanical interface for easy and reliable electrical reconnection

    Applications

    • Proximal flow measurements
    • Respiratory applications
    • Ventilation
    • Anesthesia
    • Metabolic measurement

    Single-use versions

    • Disposable solution
    • Optimized for low cost

    Reusable version

    • Autoclavable/ washable solution
    • Extremely robust housing
    • Extended EEPROM store usage data

    Flow Sensor Solutions in Modern Medical Ventilators

    The use and spread of ventilators will continue to grow strongly in the future due to the increasing number of lung diseases. Modern ventilators place ever-growing demands on sensors in order to place the focus on the patients and their therapy. The CMOSens® Technology has established a new generation of flow sensors that have proven their reliability millions of times in the field of CPAP devices and automotive applications with the advantages for ventilators being evident. This technological advantage will enable manufacturers to realize the next quantum leaps in ventilation.

    Read the complete specialist article


    Single-Use Proximal Flow Sensors

    In the past, the decision to opt for a particular flow sensing technology in respirators and ventilation devices was a painstaking and complex process. More recently, however, we have seen the emergence of flow sensor solutions that provide a fully calibrated and temperature-compensated output signal. Proximal flow sensors also have particularly high requirements with regard to hygienic sterilization due to the patient's contact with air, which can potentially be infected with pathogens.

    There are already a number of sensor solutions on the market that can be sterilized with autoclaving or other methods. All of these sensors use one of two different measurement principles: the hot-wire anemometry principle, or differential pressure measurement via an orifice or a variable orifice to increase sensitivity at low flow ranges.

    Read the complete specialist article


    Related Products

    Sensirion Mass Flow Meters SFM3300 3200 Kombi

    Mass Flow Meter SFM3300

    The SFM3300 proximal flow sensor features excellent measuring accuracy, robustness and a short signal processing time. The fully calibrated sensor measures bidirectional flow ranges of up to 250 slm.

    Mass Flow Meter SFM3400

    The SFM3400 is a proximal flow sensor for neonatal and pediatric application in respiratory devices. It is fully calibrated and temperature compensated and features high accuracy and a fast update time.

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