Liquid Flow Sensor LG216
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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

LG216 Milliliter Flow Sensor 3 Output Signal The LG216 can be ordered as analog output version (0...5V, LG216-xxxx-A) or as digital output version (LG216-xxxx-D). Digital communication between a master and the LG216 sensor runs via the standard I2C-interface. The physical interface consists of two bus lines, a data line (SDA) and a clock line (SCL). These lines can be used on 3.3V or 5.0V level with a clock frequency of 100 kHz. For the detailed specifications of this PC communication refer to the Sensirion "User Manual PC-Mode SF04". The LG216 is a uni-directional liquid flow sensor. The...

SENSIRION LG216 Milliliter Flow Sensor the sensor company Table 3: PC Output Characteristics Parameter Conditions Min. Typ. Max. Units I2C Bus Clock Frequency 100 kHz Output Voltage Low (SDA/SCL) Isink = 6mA 0.1 0.5 V Low Level Output Current(SDA/SCL) 6 mA High Level Input Voltage (SDA/SCL) 2.0 V Low Level Input Voltage (SDA/SCL) 1.0 V 4.2 Electrical Connector and Pinout Connector Type: 5 pin Molex PCB Header 53261-0590 (right angle) . Assembled flat ribbon cable Mole Pitch Recptacle Type 51021-0500 (PicoBlade 51021) included. mm Pin 1 SDA (bi-directional) 2 SCL 3 VDD 4 GND 5 Analog out 4.3...

SENSIRION LG216 Milliliter Flow Sensor the sensor company 4.4 Mechanical Specifications and Pressure Rating Inside the LG216 flow sensors a highly sensitive microsensor-chip is mounted on the outside of a straight glass capillary and allows to measure the flow through the wall (US Patent 6,813,944 B2) using a thermal principle. Table 4: Mechanical Specifications and Pressure Rating Parameter LG216-0480 Fluid Connector Standard (Fittings) %-28 for 1/16" or 1/8" OD plastic tubing Wetted Materials: Internal Sensor Capillary Material Quartz Glass (Fused Silica) Օ Fitting Material 100% PEEK...

LG216 Milliliter Flow Sensor 7 Important Notices 7.1 Warning, personal injury Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Do not use this product for applications other than its intended and authorized use. Before installing, handling, using or servicing this product, please consult the data sheet and application notes. Failure to comply with these instructions could result in death or serious injury. If the Buyer shall purchase or use SENSIRION products for any unintended or...

Headquarter and Sales Offices SENSIRION AG Laubisruetistr. 50 CH-8712 Staefa ZH Switzerland phone: +41 44 306 40 00 fax: +41 44 306 40 30 info@sensirion.com www.sensirion.com Sensirion AG (Germany) phone: +41 44 927 11 66 info@sensirion.com www.sensirion.com Sensirion Inc., USA phone: +1 805 409 4900 info us@sensirion.com www.sensirion.com Sensirion Korea Co. Ltd. phone: +82 31 345 0031 3 info@sensirion.co.kr www.sensirion.co.kr Sensirion Japan Co. Ltd. phone: +81 3 3444 4940 info@sensirion.co.jp www.sensirion.co.jp Sensirion China Co. Ltd. phone: +86 755 8252 1501 info@sensirion.com.cn...