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      • Formaldehyde Sensor SFA30

        Formaldehyde Sensing Made Easy

        The SFA30 is Sensirion’s new digital formaldehyde sensor designed for easy integration into air purifiers, demand-controlled ventilation systems, or indoor air quality monitors. Based on Sensirion’s electrochemical technology, the SFA30 offers excellent formaldehyde sensing performance with a uniquely low cross-sensitivity to other VOCs. The sensor module’s on-board SHT sensor provides accurate humidity and temperature readings and enables a fully temperature/humidity compensated and factory calibrated formaldehyde concentration output in ppb.

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      • 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

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        Experts for Smart Sensor Solutions

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    • Liquid Flow Sensor LD20

      Single-use Flow Sensor for Biomedical Applications

    • Home
    • Flow Sensors
    • Liquid Flow Meters
    • Liquid Flow Sensor LD20

    Liquid Flow Sensor LD20

    Single-use Flow Sensor for Biomedical Applications

    Safe, precise, and reliable measurement of low flow rates in medical environment has never been so easy: The single-use liquid flow sensors of the LD20 series measure the liquid flow rate directly and at the point of interest for a more effective patient treatment and improved safety.

    Nowadays, keywords and trends such as point-of-care, patient compliance, complex drug administering, and wearable designs demand the development of smart medical devices. The LD20 series combines Sensirion’s proven liquid flow sensing technology with a single-use, cost-optimized design for high volume applications in the medical, life-science or food industry. The sensor provides a bidirectional measurement of flow rates from 1000 ml/h down to single-digit ml/h, while it as well reliably detects common failure modes such as occlusion, free flow, or air bubbles with unprecedented speed and sensitivity.

    The LD20 series optimizes costs by reducing the flow sensor to its bare minimum while still ensuring easy fluidic, electrical and mechanical connections. Barbed or luer lock fittings guarantee secure and straight-forward integration into the fluidic line: for example, into a catheter or an infusion set. Inert wetted materials provide outstanding chemical resistance and excellent media compatibility.

    When using a sensor of the LD20 series, drug delivery can be measured precisely and in real time. Consequentially, drug therapies become more effective, as they become easier to monitor and control. The LD20 liquid flow sensor series enables medical device manufacturers to enhance the safety, performance, and reliability of their products for the benefit of patients and care givers.

    Sensor Evaluation

    For quick and easy testing, a ready-to-use kit is available. Together with the provided software, it enables a plug and play connection of the sensor to a PC. The LD20 evaluation kit can be ordered from our distributors.


    Features

    • Full scale flow rate for water-based liquids: 1000 ml/h
    • Bidirectional measurement and real time failure detection
    • Highest sensitivity for detection of infiltration and multi-infusion settings
    • Media isolation: No contact of the sensor chip with valuable medications or body fluids
    • High speed measurement: Response time < 50 ms
    • Low power consumption: Suitable for battery-powered applications
    • Highly integrated: Fully calibrated, linearized, and temperature compensated digital I2C signal from a single chip
    • Highly scalable sensor design: Competitive pricing for single-use applications

    Applications

    • Biomedical devices
    • Advanced infusion therapy
    • (Wearable) drug delivery devices
    • Urine catheters
    • Surgical instruments
    • Bioreactors

     

     


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    Download Center

    Here you can find all documents of Sensirion's liquid flow meters for download.


    Yet Another Technical Gap Closed: Measuring Lowest Flow Rates in Medical Therapies

    Medical procedures and therapies are often faced by the same challenge: accurately measuring and controlling lowest flow rates down to the microliter per hour range. In most of these cases the outcome of the therapy, as well as the well-being or even the survival of  the patient strongly rely on the reliable and continuous drug administration in such low flow regimes. While various countermeasures have been evaluated and introduced, there is still room for improvement and for new technologies to be established. One novel development with tremendous potential is a single-use liquid flow sensor that is able to measure lowest flow rates and detect common failure modes quickly and reliably.

    Read more


    Advanced Failure Detection of the LD20 Series

    Due to Sensirion’s unique CMOSens® Technology, the LD20 liquid flow sensor is sensitive enough to detect the smallest changes in the flow rate. For instance, when integrated into an infusion set, it is so sensitive that it can detect the regular peaks in the infusion flow rate produced by the oscillating back pressure of the patient’s venous pulse – the sensor can feel the patient’s heartbeat.

    Detecting the heartbeat on the flow rate is a direct indication of an intact connection of the infusion cannula to the vein of the patient, absence of the pulsation on the contrary indicates an interrupted connection. Possible causes may include e.g. kinked, disconnected or, ruptured tubing or a dislodged infusion cannula which may in turn lead to infiltration. By evaluating the sensor signal, Sensirion’s sensor solution offers a unique possibility of detecting infiltration quickly and preventing harmful consequences to the patient.

    Read more


    Closed loop constant flow rate flow source for high precision applications

    In a typical lab environment, microfluidic experiments can often rely on external sources like pressurized air to drive media through the experiment. TTP Ventus manufactures the Disc Pump™, a small air pump, that can be used to build independent or even portable pressure driven flow sources for microfluidic applications. The advantage of a pressure driven flow source are the stable and non-pulsatile flow rates created over a large dynamic range. In order to leverage the full potential of such a flow source, the SLF3S-0600F liquid flow sensor for example can be used to create a small and highly integrated closed feedback loop system. By including the real time flow rate reading of the liquid flow sensor, the pump controller can drive the pump in exactly the right way to create the desired flow rates. Both, single and permanent use designs can be achieved by this approach.

    Read more


    Sensors for Single-Use Liquid Flow Applications

    Part of Quantex’s 4C Wearable Drug Delivery IoT Platform


    Related Products

    Liquid Flow Sensor SLF3x

    The SLF3x with a radically optimized mechanical design, takes the well-established functionality to the next level in price-performance ratio. The sensor maximizes safety, stability and long-term reliability in a vast range of applications.

    Sensirion Liquid Flow Meters SLI

    Liquid Flow Meter SLI

    The SLI mass flow meter series for liquids are for integration into demanding fluidic systems, ensures highly accurate measurements at low flow rates, and makes reliable and accurate dosage possible.

    Sensirion Liquid Flow Meters SLS 1500

    Liquid Flow Meter SLS-1500

    The SLS-1500 flow meter enables fast and precise measurements for flow rates of 0–40 ml/min. The inert, wetted materials of the sensor provide outstanding chemical resistance and biocompatibility.

    Sensirion Liquid Flow Meters SLQ QT500

    Liquid Flow Meter SLQ-QT500

    The versatile SLQ-QT500 flow meter measures flow rates of 0–120 ml/min. for water-based as well as hydrocarbon-based liquids and is suitable for a variety of dosing and flow applications.

    Sensirion Liquid Flow Meters SLQ-QT105

    Liquid Flow Meter SLQ-QT105

    The SLQ-QT105 flow meter is characterized by high sensitivity, reliability, and speed, and is ideally suited for measuring hydrocarbon-based liquids like photoresists and solvents.

    Sensirion Liquid Flow Meters SLG

    Liquid Flow Meter SLG

    The SLG flow meter series is ideal for monitoring rapidly changing ultralow flow rates in UHPLC applications and provides high pressure resistance of the flow channel and fast response time.

    Sensirion Liquid Flow Meters LG16

    Liquid Flow Meter LG16

    The small, pressure-resistant LG16 flow meter is used for measuring flow rates of less than 80 ml/min. Thanks to the short response time, the sensor makes it possible to detect air bubbles.

    Sensirion Liquid Flow Meters LG01

    Liquid Flow Meter LG01

    The flow switch and bubble detector LG01 measures flow rates of just a few milliliters per minute and below. It is characterized by excellent biocompatibility and chemical resistance.

    Sensirion Liquid Flow Meters LS32 1500

    Liquid Flow Meter LS32-1500

    The compact LS32-1500 flow meter measures flow rates in the 0–40 ml/min. range, is extremely robust in terms of mechanics and is characterized by its excellent repeatability and fast response time.

    Sensirion Liquid Flow Meters LPGx

    Liquid Flow Sensor LPG10

    The LPG10 OEM flow sensor on a surface of just 10 mm × 10 mm offers a smart, accurate and fast sensor solution for flow rates of only a few microliters per minute to up to 1 ml/min.

    Sensirion Customized Solutions

    Customized (OEM) Liquid Flow Meters

    Besides the standard gas flow sensor solutions, we also offer customized OEM sensor solutions at an attractive price performance ratio. We adapt or develop your customized liquid flow meters.

    Sensirion Liquid Flow Meters Flow Meter Kit SLI

    Liquid Flow Meter Kits

    For quick and easy measurements of all liquid flow meters, a test kit can be ordered. The liquid flow meter kit provides a first impression of the performance of the sensors.

    Technical Documents

    • Datasheet LD20-2600B
    • Datasheet LD20-0600L (Preliminary)
    • Engineering Guidelines LD20 Base Station
    • Product Flyer LD20
    • CAD Model LD20 Base Station
    • CAD Model Liquid Flow Sensor LD20-2600B
    • CAD Model Liquid Flow Sensor LD20-0600L

    Press

    • Sensirion Sensor + Fraunhofer Micropump = A Miniaturized Smart Drug Delivery Module
    • Disposable Liquid Flow Sensors for Biomedical Applications

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    • Medical
    • Industrial

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