www.sensirion.com version 2 C february 2015 1 / 4 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 ls 32 - 1500 enables precise, non - invasive mea - surements 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 l iquid f low s en sor is formed by an especially thin - walled, straight tube which assures excellent sensitivity. digital - i2c - bus for more information on communication, please refer to page 2 of this document. 1 sensing performance table 1 : p erformance of l s 32 - 15 00 (all data for medium h 2 o, 23 c, 1 bar abs unless otherwise noted) parameter ls32 - 1500 unit full s cale f low r ate 40 m l/min sensor o utput l imit a 65 ml/min accuracy below full scale (whichever error is larger) 10 % of measured value 0.25 % of full scale repeatabi lity error from zero to full scale (whichever error is larger) 1 % of measured value 0.025 % of full scale temperature c oefficient ( additional error per c ; whichever is larger ) 0.25 % measured value / c 0.00625 % full scale / c flow d etection r esp onse t ime ? 63 20 ms response t ime o n p ower - u p 25 ms operating t emperature + 5 + 50 c ambient storage temperature b - 10+60 c operating p ressure 12 (175 ) bar (psi) proof pressure 2 5 ( 36 0 ) bar (psi) a flow rate at which the sensor output saturates , s ee s ection 2 for performance spec ification between full scale and saturation point b non - condensing, flow path empty
www.sensirion.com version 2 C february 2015 2 / 4 2 s pecifications charts figure 1: sensor accuracy and repeatability ( % of measured value ) across the sensors flow range figure 2 : sensor a ccuracy and repeatability (ml/min) across the sensors flow range 3 communication with the sensor the oem flow sensor ls32 - 1500 shows bi directional, linear transfer characteristics. the product comes fully calibrated for water. digital sampling time, 1 6 bit 74 ms digital sampling time, 9 bit 1 ms 3.1 electrical specifications table 2 : dc characteristics parameter conditions min. typ. max. units po wer s upply dc, vdd 4.0 5.0 6 v operating c urrent vdd = 4.0 - 5.5 v 5.1 ma 3.2 electrical connector and sensor pinout connector type: pcb header molex 4pin vertical art. - no. 0533980471 . pin 1 sc l (bi - directional) 2 vdd 3 gnd 4 sda 3.3 digital communication via i2c - bus d igital communication between a master and the ls32 - 1500 sensor runs via the standard i2c - interfa ce. 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 k hz. for the detailed specifications of this i2c communication , please refer to specific i2c application notes from sensirion .
www.sensirion.com version 2 C february 2015 3 / 4 4 fluidic connection table 3 : fluidic specifications and pressure rating parameter ls 32 - 15 00 wetted m aterials: ? internal s ensor t ube m a terial 904l high - performance stainless steel ? fitting m aterial peek ? sealing m aterial ptfe fluid c onnector p orts (fittings) 1/4 - 28 flat bottom 1/8 od tubing (recommended: min 2mm id) pressure d rop (at 40 ml/min, h 2 o, 23c) 2.15 mbar total i nternal v o lume ~70 ? l for more information on the f luidic 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 ls 32 - 15 00 largest dimen sions 59 x 18 x 18 mm total m ass ~30 g inner d iameter s ensor t ube 1.5 mm all dimensions in mm 6 ordering information for oem applications the sensor can be purchased in larger quantities without any additional parts ( 10 0 pcs. minimum orde r quantity) . a 30 cm long 4 - pin molex to pigtail ribbon cable is included . product article no ls32 - 1500 40 ml/min 1 - 101127 - 01 molex picoblade 4 pin connector art. no. 533980471 2 x 1/4 - 28 flat bottom 2 x m2.5 thread for mounting 904l high - performance sta inless steel peek
www.sensirion.com version 2 C february 2015 4 / 4 important notices warning, personal injury do not use this product as safety or emergency stop devices or in any other appl ication 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 da tasheet 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 h armless 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 discharg e (esd). to prevent esd - induced damage and/or degradation, take customary and statutory esd precautions when handling this product. warranty sensirion warrants solely to the original purchaser of this product for a period of 12 months (one year) from the d ate of delivery that this product shall be of the quality, material and workmanship defined in sensirions published specifications of the product. within such period, if proven to be defective, sensirion shall repair and/or replace this product, in sensir ions discretion, free of charge to the buyer, provided that: ? notice in writing describing the defects shall be given to sensirion within fourteen (14) days after their appearance; ? such defects shall be found, to sensirions reasonable satisfaction, to ha ve arisen from sensirions faulty design, material, or workmanship; ? the defective product shall be returned to sensirions factory at the buyers expense; and ? the warranty period for any repaired or replaced product shall be limited to the unexpired porti on of the original period. 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 fort h 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. s ensirion 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 good s 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 limita tion consequential or incidental damages. all operating parameters, including without limitation recommended parameters, must be validated for each customers applications by customers 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. copyright ? 2001 - 2015 , sensirion. c mosens ? 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 che micals (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 phone: +41 44 306 40 00 fax: +41 44 306 40 30 info@sensirion.com www.sensirion.com sensirion inc., usa phone: +1 805 409 4900 info_us@sensirion.com www.sensirion.com sensirion japan co. ltd. phone: +81 3 3444 4940 info@sensirion.co.jp www.sensirion.co.jp sensirion korea co. ltd. phone: +82 31 345 0031 3 info@sensirion.co.kr www.sensirion.co.kr sensirion china co. ltd. phone: +86 755 8252 1501 info@sensirion.com.cn www.sensirion.com .cn sensirion ag (germany) phone: +41 4 4 927 11 66 info@sensirion.com www.sensirion.com to find your local representative, please visit www.sensirion.com/contact
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