www.sensirion.com preliminary v ersion 0.6 C december 2016 1 /6 ld20 liquid flow sensor series C p rototype single - use flow sensor for biomedical applications ? low flow s ensing up to 1200 ml/ h (20 ml/min ) ? l uer lock or barbed f luid ic c onnectors ? millisecond - fast response t ime product summary the ld20 liquid flow sen sor series enables precise and reliable measurements of dynamic liquid flow rates from a few hundred l/h up to 1200 ml/h bi - directional ly . this sensor has been designed for single - use applications in the biomedical field. the ld20 series is still being de veloped. thus any specification can be subject to change in the future (performance, fittings, communication, etc.). electrical interface : digital - i 2 c - bus for more information on communication, please refer to section 3 of t his document (preliminary). 1 sens or performanc e (preliminary data, subject to change) the following table 1 lists preliminary specifi c ations of the current prototypes. please contact sensirion if different specifications are req uired. 3d - printed samples of the small (ld20 - 0600) and medium (ld20 - 1300) ld20 versions are available on request. please contact sensirion. parameter ld20 - 0600 x ld20 - 1300 x ld20 - 2600 b unit h 2 o full s cale f low r at e 20 ( 0. 3 ) 250 ( 4.2 ) 1000 ( 16.6 ) m l/h (ml/ min ) h 2 o sensor o utput l imit a 25 (0. 4 ) 300 ( 5 ) 13 00 (21.67 ) ml/ h (ml/min ) accuracy below full scale (whichever error is larger) tbd tbd 5 % of m.v. b tbd tbd 0. 25 % of full scale repeatability below full scale (whichever error is larger) tbd tbd 0.5 % of m.v. tbd tbd 0. 025 % of full scale temperature c oefficient c (additional error / c; whichever is larger) tbd tbd 0.2 % m.v. / c tbd tbd 0.01 % full scale / c mounting o rientation s ensitivity d tbd tbd 1.0 % of full scale flow detection r esponse t ime ? 63 tbd tbd tbd ms a flow rate at which the sensor output saturates. see section 2 for performance between full scale and saturation point. b measured value c additional accuracy error for temperatures deviating from 23 c. d maximum addit ional offset when flow channel is vertical.
l d20 liquid flow sensor series www.sensirion.com preliminary v ersion 0.6 C december 2016 2 /6 parameter ld20 - 0600 x ld20 - 1300 x ld20 - 2600 b unit response t ime o n p ower - u p tbd tbd tbd ms operating t emperature +15 +45 (+59 +113) c (f) operating humidity 095 %, non - condensing % rh maximum recommended o perating p ressure 3 (45) bar (psi) burst pressure 1 0 ( 145 ) bar (p si) recommended maximum use duration 7 days short term storage temperature e - 1 0 +60 ( + 14 + 140) c (f) short term storage humidi t y e 095 %, non - condensing % rh shelf life f 3 years table 1 : performance of ld20 series (all da ta for medium h 2 o, at 23c) 2 specifications charts figure 1 : liquid f low sensor accuracy and repeatability across the flow range of the ld20 - 2600 b . relative error in % of measured value (left) and absolute error in m l/ h (righ t) for h 2 o . e f low path empty. short term storage refers to temporary conditions during e.g. transport. f when stored at 15c - 35c and 20 - 80 % r . h. - 1300 - 1000 - 500 0 500 1000 1300 0% 5% 10% 15% accuracy (% of measured value) flow rate ( m l/h h 2 o) ld20 - 2600b relative accuracy with h 2 o at 23c at 6c/40c repeatability 0.02 0.2 2 20 200 1 10 100 1000 accuracy ( m l/h) flow rate ( m l/h h 2 o) ld20 - 2600b absolute accuracy with h 2 o at 23c at 6c/40c repeatability
l d20 liquid flow sensor series www.sensirion.com preliminary v ersion 0.6 C december 2016 3 /6 3 communication with the sensor (preliminary data, subject to change) the ld20 - 2 600 b flow sensor shows bi - directional, linear transfer characteristics. the product comes ful ly calibrated for water. digital s ampling t ime, 16 bit 74 ms digital s ampling t ime, 9 bit 1 ms 3.1 electrical specifications parameter conditions min . typ. max. units power s upply dc, vdd sensor only 3.3 3. 5 3.7 v operating c urrent vdd = 3.5 v 5. 1 ma table 2 : dc c haracteristics 3.2 electrical connector and pad assignment the liquid flow sensor is equipped with metal contact pads for electrical connection. g pad description 1 sda (data) 2 scl (clock) 3 vdd d 4 vdd a 5 gnd table 3 : electrical pad layout g please note, that the electrical connector provided as part of the eva luation kit for testing purposes will not be commercially available. its design is in the scope of the customer. 3.3 digital communicatio n via i2c - bus digital communication between a master and the ld20 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. by default, the i 2 c address is set to 64 ( hexadecimal: 40, binary: 1000000). these lines can be used on the 3.3 v level with a clock frequency of 100 khz. for the detailed specifications of this i2c communication, please refer t o the specific i2c application notes from sensirion . parameter min. typ. max. units i 2 c b us c lock f requency 100 khz output v oltage l ow (sda/scl), i sink = 6 ma 0.1 0.5 v low l evel o utput c urrent (sda/scl) 6 ma high l evel i nput v oltage (sda/scl) 2. 0 v low l evel i nput v oltage (sda/scl) 1.0 v table 4 : i 2 c output c haracteristics 1 5
l d20 liquid flow sensor series www.sensirion.com preliminary v ersion 0.6 C december 2016 4 /6 4 fluidic specifications and connections parameter ld20 - 0600 x ld20 - 1300 x ld20 - 2600 b wetted m a terials 3d - printed samples are available on request polyetherimide (pei), liquid - crystal - polymer (lcp), medical - grade adhesive fluid ic connector ports (f ittings) b arbed fittings for 3d printed samples (final fitting design to be defined ) barbed fittings od of barbed fittings 1.75 mm tbd 4.0 mm recommen ded tubing id for barbed fittings 1.6 mm (1/16) tbd 3.2 mm (1/8) pressure drop (at full scale flow rate, h 2 o, 23 c) <1.0 mbar tbd < 0.2 mbar table 5 : fluidic s pecifications and connections 5 mechanical specifications parameter ld 20 - 0600 x ld20 - 13 00 x ld20 - 2600 b largest dimensions ~ 35.4 x 15 x 12 mm tbd ~ 48 x 1 5 x 12 mm total mass tbd tbd 1.7 g inner diameter ~ 0.8 mm tbd ~ 2.6 mm table 6 : mechanical s pecifications figure 2 : dimensions of ld20 - 2600b (in mm)
l d20 liquid flow sensor series www.sensirion.com preliminary v ersion 0.6 C december 2016 5 /6 6 order information the ld20 evaluation kit contains: ? 3 pcs d isposable liquid flow sensors of type ld20 - 2600 b ? b ase station used as a r eusable electrical interface connector (prototype) ? pc softw are (viewer & data export t ool) ? scc1 - usb sensor cable with usb connector for plug - and - play connection to a pc . product article number ld20 - 2600b liquid flow sensor with barbed fittings 1 - 101564 - 01 b ase station for ld20 series (prototype) 1 - 101481 - 01 scc1 - usb s ensor cable 1 - 1010 07 - 01 evaluation kit ld20 - 2600 b 1 - 101431 - 0 2 table 7 : order information 3d - printed samples of the small (ld20 - 0600 x ) and medium (ld20 - 1300 x ) ld20 versions are available on request also as part of an evaluation kit . please contact sensirion.
l d20 liquid flow sensor series www.sensirion.com preliminary v ersion 0.6 C december 2016 6 /6 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 appl ications 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, dama ges 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 t he 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 th is product. warranty 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 sensirions published spe cifications of the product. within such period, if proven to be defective, sensirion shall repair and/or replace this product, in sensirions 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 have arisen from sensirions faulty design, material, or workmanship; ? the defective product shall be returned to sensirio ns factory at the buyers expense; and ? the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period. this warranty does not apply to any equipment which has not been installed and used within th e 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 datash eet 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 ar ising 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 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 - 201 6 , sensirion. cmosens ? is a trademark of sensirion. all rights reserved . rohs, reach and weee statement the flow sensors of the ld 20 s e ries comply with requirements of the following directives and regulations: ? eu directive 1907/2006/ec concerning registration, evaluation, authorization and restriction of chemicals (reach) ? eu directive 2002/96/ec on waste electrical and electronic equipme nt (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 laubisruetis tr. 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 - jp@sensirion.com www.sensirion.co.jp sensirion korea co. ltd. phone: +82 31 337 7700 - 3 info - kr@sensirion.com www.sensirion.co.kr sensirion china co. ltd. phone: +86 755 8252 1501 info - cn@sensirion.com www.sensirion.com .cn sensirion taiwan co. ltd. info@sensirion.com www.sensirion.com to find your local representative, please visit www.sensirion.com/contact
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