LS32-1500 Liquid Flow Meter Compact Flow Meter for Low Flow Rates Liquid flow rates up to 40 ml/min 20 ms response time Excellent repeatability High chemical compatibility Product Summary Interface Options The LS32-1500 enables precise, non-invasive measurements of dynamic liquid flow rates up to 40 ml/min bi-directionally. Excellent biocompatibility is ensured by the exclusive use of high-performance stainless steel, PTFE and PEEK for the wetted parts. The flow path of the LS32-1500 liquid flow sensor is formed by an especially thin-walled, straight tube which assures excellent sensitivity. Digital - I2C-Bus 1 For more information on communication, please refer to page 2 of this document. Sensing Performance Table 1: Performance of LS32-1500 (all data for medium H2O, 23°C, 1 barabs unless otherwise noted) Parameter LS32-1500 Unit Full scale flow rate Sensor output limita Accuracy below full scale (whichever error is larger) Repeatability error from zero to full scale (whichever error is larger) Temperature coefficient (additional error per °C; whichever is larger) Flow detection response time 63 Response time on power-up Operating temperature Ambient storage temperatureb Operating pressure Proof pressure aFlow rate at which the sensor output 40 65 10 0.25 1 0.025 0.25 0.00625 20 25 +5…+50 -10…+60 12 (175) 25 (360) ml/min ml/min % of measured value % of full scale % of measured value % of full scale % measured value / °C % full scale / °C ms ms °C °C bar (psi) bar (psi) saturates, see section 2 for performance specification between full scale and saturation point bNon-condensing, flow path empty www.sensirion.com Version 2 – February 2015 1/4 2 Specifications Charts Figure 1: Sensor accuracy and repeatability (% of measured value) across the sensor’s flow range 3 Figure 2: Sensor accuracy and repeatability (ml/min) across the sensor’s flow range Communication with the Sensor The OEM flow sensor LS32-1500 shows bidirectional, linear transfer characteristics. The product comes fully calibrated for water. Digital Sampling Time, 16 bit Digital Sampling Time, 9 bit 74 ms 1 ms 3.1 Electrical Specifications Table 2: DC Characteristics Parameter Conditions Power supply DC, VDD Operating current Min. Typ. Max. Units 4.0 VDD = 4.0-5.5 V 5.0 6 V 5.1 3.3 Digital Communication via I²C-Bus Digital communication between a master and the LS32-1500 sensor runs via the standard I²C-interface. The physical interface consists of two bus lines, a data line (SDA) and a clock line (SCL) which need to be connected via pull-up resistors to the bus voltage of the system. 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 I²C communication, please refer to specific I²C Application Notes from Sensirion. mA 3.2 Electrical Connector and Sensor Pinout Connector Type: PCB Header Molex 4Pin Vertical Art.-No. 0533980471. Pin 1 2 3 4 SCL (bi-directional) VDD GND SDA www.sensirion.com Version 2 – February 2015 2/4 4 Fluidic Connection Table 3: Fluidic Specifications and Pressure Rating Parameter LS32-1500 Wetted materials: 904L high-performance stainless steel PEEK PTFE 1/4-28 flat bottom 1/8” OD tubing (recommended: min 2mm ID) 2.15 mbar Internal sensor tube material Fitting material Sealing material Fluid connector ports (Fittings) Pressure drop (at 40 ml/min, H2O, 23°C) Total internal volume ~70 l For more information on the fluidic connection please find: “Application Note Sensor Ports and Tubing Connections” in the Download Center on our homepage. 5 Mechanical Specifications Table 4: Mechanical Specifications Parameter LS32-1500 Largest dimensions Total mass Inner diameter sensor tube 2 x 1/4-28 flat bottom 59 x 18 x 18 mm ~30 g 1.5 mm Molex PicoBlade 4 pin connector Art. No. 533980471 2 x M2.5 thread for mounting PEEK 904L high-performance stainless steel All dimensions in mm 6 Ordering Information For OEM applications the sensor can be purchased in larger quantities without any additional parts (100 pcs. minimum order quantity). A 30 cm long 4-pin Molex to pigtail ribbon cable is included. Product LS32-1500 40 ml/min www.sensirion.com Article No 1-101127-01 Version 2 – February 2015 3/4 Important Notices 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 (including death). 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 datasheet 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 unauthorized application, Buyer shall defend, indemnify and hold harmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if SENSIRION shall be allegedly negligent with respect to the design or the manufacture of the product. ESD Precautions The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take customary and statutory ESD precautions when handling this product. Warranty This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN, SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED. SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the datasheet and proper use of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not in accordance with the technical specifications. SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation recommended parameters, must be validated for each customer’s applications by customer’s technical experts. Recommended parameters can and do vary in different applications. SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and (ii) to improve reliability, functions and design of this product. SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this product shall be of the quality, material and workmanship defined in SENSIRION’s published specifications of the product. Within such period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION’s discretion, free of charge to the Buyer, provided that: Copyright © 2001-2015, SENSIRION. notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance; such defects shall be found, to SENSIRION’s reasonable satisfaction, to have arisen from SENSIRION’s faulty design, material, or workmanship; the defective product shall be returned to SENSIRION’s factory at the Buyer’s expense; and the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period. CMOSens® is a trademark of Sensirion All rights reserved REACH, RoHS and WEEE Statement The LS32-1500 complies with requirements of the following directives: EU Directive 1907/2006/EC concerning Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) EU Directive 2002/96/EC on waste electrical and electronic equipment (WEEE), OJ13.02.2003; esp. its Article 6 (1) with Annex II. EU Directive 2002/65/EC on the restriction of certain hazardous substances in electric and electronic equipment (RoHS), OJ01.01.2011 Headquarters and Subsidiaries SENSIRION AG Laubisruetistr. 50 CH-8712 Staefa ZH Switzerland Sensirion Inc., USA phone: +1 805 409 4900 [email protected] www.sensirion.com Sensirion Korea Co. Ltd. phone: +82 31 345 0031 3 [email protected] www.sensirion.co.kr phone: +41 44 306 40 00 fax: +41 44 306 40 30 [email protected] www.sensirion.com Sensirion Japan Co. Ltd. phone: +81 3 3444 4940 [email protected] www.sensirion.co.jp Sensirion China Co. Ltd. phone: +86 755 8252 1501 [email protected] www.sensirion.com.cn Sensirion AG (Germany) phone: +41 44 927 11 66 [email protected] www.sensirion.com To find your local representative, please visit www.sensirion.com/contact www.sensirion.com Version 2 – February 2015 4/4