Micro Flow Switch and Bubble Detector for Liquids

The Swiss sensor manufacturer Sensirion AG is launching the LG01 micro flow switch for ultra-low liquid flow rates and bubble detection. The sensor makes fluidic systems more reliable by enabling the detection of liquid flow within the range of a few ml/min and less. For such measurements the sensor offers a short response time below 100 ms. Its output signal of either 0 or 5 volts indicates whether the current flow rate is above or below the specified flow switch level. At continuous flow rates above this limit the identification of air bubbles within the flow channel is equally consistent. Maximum flow rates are accepted up to 220 ml/min. Fluidic connections can be made via ¼-28 standard fittings, suitable for connecting plastic tubing with outer diameters of 1/8” (3.2 mm) or 1/6” (1.6 mm). Barb connector adapters are available as an alternative.

The tiny, light sensor is designed for integration into bio-medical applications and general process control solutions. An excellent chemical resistance and bio-compatibility are ensured by its non-invasive measurement through the wall of the straight, internal glass capillary (diameter 1.8 mm) and fluidic connectors made of PEEK™ high-end plastics. The new product is based on a digital MEMS chip and expands Sensirion’s existing line of high-quality liquid flow products by employing a simple and cost-efficient solution.

About Sensirion

The Swiss sensor manufacturer Sensirion AG is a leading international supplier of CMOS-based sensor components and systems. Its range of high-quality products includes humidity and temperature sensors, mass flow meters and controllers, gas and liquid flow sensors, and differential pressure sensors. Sensirion supports its international OEM customers with tailormade sensor system solutions for a wide variety of applications. Among others, they include analytical instruments, consumer goods, and applications in the medical technology, automotive and HVAC sectors. Sensirion products are distinguished by their use of patented CMOSens® technology. This enables customers to benefit from intelligent system integration, including calibration and digital interfaces. Sensirion’s competence as a reliable OEM partner is underlined by its quality management system, which was certified in March 2008 in accordance with the ISO/TS 16949 standard.