Liquid Flow Sensor LG2160 pages

Datasheet LG216 Pressure Rsistant Milliliter Flow Sensor ■ Maximum flow up to 20 ml/min ■ Resolutions in the pl-Range ■ Flow path made of glass and PEEK only ■ Maximum pressure up to 20 bar (290 psi) 1 Introduction LG216 The LG216 Liquid Flow Sensor series enables fast, non invasive measurements of low liquid flow rates up to 20 ml/min with medium watera. This product line is especially suited for OEM volume applications requiring small sized components with high performance at low cost. Excellent chemical resistance and bio-compatibility are ensured: The flow path of the LG216 Liquid Flow Sensors is formed by a simple, straight glass capillary. This Swiss made, non invasive sensors are based on Sensirion's patented CMOSens® Technology (US Patent 6,813,944 B2). The fourth generation MEMS sensors combine a thermal high precision sensor element with amplification circuits and digital intelligence for linearization and temperature compensation on one single microchip - the products core element. Attention: The output signal can be misunderstood below the specified minimum flow rate. 2 Sensing Performance Table 1: Model specific performance of LG216 (all data for medium H2O, 20°C, 1 barabs unless otherwise noted) Parameter Condition LG216-0480 Units Maximum Flow Rate 20 ml/min Minimum Flow Rate 1.0 ml/min Digital Resolution (16 bit) Minimum Flow Rate 0.8 ml/min Accuracy 5.0 % of measured value Temperature Coefficient 0.1 (% m.v.) / K Signal Noise, 16 bit digital output - at Minimum Flow Rate - at Maximum Flow Rate 4.5 LSB 16 ml/min 180 ml/min Signal Noise, analog output, RMS < 2 mV Flow Detection Response Time t63 50 ms Response Time On Power-Up 120 ms Digital Sampling Rate, 16 bit 74 ms Digital Sampling Rate, 9 bit 1 ms Operating Temperature +10...+50 °C Ambient storage temperature -10.. .+60 (empty flow channel) °C Attention: Minimize Temperature Differences For correct operation of the LG216 flow sensors the temperature difference between liquid medium and ambient air needs to be minimized. This temperature difference must not exceed 3°C. i ■ a The sensors of the LG216 series are only suited for use with water or aqueous solution (solutions with high water content). For measureing other liquids please refer to Sensirion's other liquid flow sensors. www.sensirion.com January 2011 V1.1 1/6