LG01-2000A090 Sensirion

LG01-2000Axxx Liquid Flow Switch and Bubble Detector Detection of low liquid flow in the ml/min Range Totally non-invasive Ultra-fast response time of 100 ms Product Summary The LG01 Liquid Flow Switch enables detection of Excellent chemical resistance and bio-compatibility flow of liquid in the range of ml/min. The output signal are ensured: The flow path of the LG01 Liquid Flow is 5V when the flow rate is higher than the specified Switch is formed by a simple, straight glass capillary. flow switch point and 0V below this limit or when air or bubbles are found inside the sensors flow channel For more information on communication, please refer instead of liquid. to section 2 of this document. 1 Sensing Performance Table 1: Model specific performance of LG01 (all data for medium H O, 23C) 2 Parameter LG01-2000A090 LG01-2000A005 Unit H O flow switching point 4.5 0.25 ml/min 2 H2O maximum flow rate 50 220 ml/min a Accuracy of switching point 10 10 % of switching point Switching hysteresis 5 5 % of switching point b Mounting orientation sensitivity +2 +14 % of switching point Flow detection response time 50 ms 63 Response time on power-up 120 ms Operating temperature +10+50 C c Ambient storage temperature -10+60 C Operating pressure 3 bar Proof pressure 5 bar a Better available on request b Maximum shift of switching point if mounted vertically c Non-condensing, flow path empty 1.1 Operation with Other Liquids than Water Due to the measurement principle the LG01 flow switch characteristics is changing with the thermal properties of the liquid. For aqueous solutions the data for H O as stated above is a good approximation. 2 For hydrocarbon liquids such as oil, fuel, or organic solvents, the flow switch point shifts towards higher flow rates. For indicative purpose, data is provided for isopropyl alcohol (IPA) below. Table 2: Approximate switch levels of the LG01 liquid flow switch with hydrocarbon liquids Parameter LG01-2000A090 LG01-2000A005 Unit Approximate flow switching point with IPA 9 1.4 ml/min Maximum flow rate with IPA >250 >250 ml/min www.sensirion.com February 2015 V2 1/4 2 Communication with the Sensor An electrical voltage output indicates flow above (5 V) 2.2 Electrical Connector and Sensor Pinout or below (0 V) the flow switch point and/or air or bubbles inside the sensors flow channel. The product Connector Type: 5 pin Molex PCB Header comes fully calibrated for water for volume 53261-0590 Mating connector: Molex 51021-0500. applications flow calibration for other media is available on request. Table 4: Electrical Pinout Pin 2.1 Electrical Specifications 1 Do not connect 2 Do not connect Table 3: DC Characteristics 3 VDD 1 2 Parameter Min. Typ. Max. Units 3 4 GND 4 5 a Power supply DC, VDD 5 7 12 V 5 Voltage output Operating current, 6.8 mA VDD = 9 V, no load Voltage output high 5 V Voltage output low 0 V a Use 9 V max. for best performance 3 Fluidic Connection Table 5: Fluidic Specifications and Pressure Rating Parameter LG01-2000Axxx Wetted materials: Internal sensor tube material Borosilicate Glass 3.3 PEEK Fitting material Sealing material FEP -28 flat-bottom for 1/16 or 1/8 OD plastic tubing Fluid connector ports (Fittings) a (min. 2mm ID recommended) Pressure drop (at maximum flow rate, H O, 23C) 1 mbar 2 Total internal volume 80 l a For fluid connection material use flat bottom -28 standard components e.g. IDEX parts P-200/P-300. Various adapters e.g. to Barb connectors are available from company Value Plastics as well. For more information on the fluidic connection please find: Application Note Sensor Ports and Tubing Connections in the Download Center on our webpage (www.sensirion.com/liquidflow-download). 4 Connectivity Kit The optional LG01 connectivity kit contains material for electrical and fluidic connections Assembled flat ribbon cable, 30cm (1-100482-01) 2x barb adapter to connect ID 1.6 mm (1/16) tubing (Value Plastics ABR004-J1A-2) 2x barb adapter to connect ID 3.2 mm (1/8) tubing (Value Plastics ABR013-J1A-1) www.sensirion.com February 2015 V2 2/4