fss - smt series low profile force sensor description honeywells fss - smt series force sensors are designed to be one of the most reliable force sensors available as illustrated by 20 million mean cycles t o failure (mctf) at 25 c [77 f] rating. this low profile surface mount technology (smt) sen sor allows for automated assembly on a printed circuit board, often helping the customer to reduce assembly costs. the fss - smt series force sensor is designed to provide precise and reliable force sensing performance in a compact commercial - grade package. the sensor incorporates honeywell sensing technology that uses a specialized piezoresistive micromachined silicon sensing element. the low power, unamplified, uncompensated wheatstone bridge circuit design provides inherently stable m v output over the for ce range. force sensors operate on the principle that the resistance of silicon - implanted piezoresistors will change when the resistors flex under applied force. the sensor concentrates force from the applications, through the stainless steel ball, dire ctly to the silicon - sensing element. the amount of resistance changes in proportion to the amount of force being applied. this change in circuit resistance results in a corresponding mv output level change. the sensor package design incorporates patented modular construction. the use of innovative elastomeric technology and engineered molded plastics results in load excitation capacities up to 60 n (range dependent) . the stainless steel ball provides excellent mechanical stability, and is suitable for a va riety of potential medical and commercial applications. features and benefits ? surface mount technology allows for automated assembly and may eliminate hand soldering ? rohs - compliant materials meet directive 2002/95/ec ? low deflection ( approx. 30 m typical at full scale) help s reduce measurement error ? direct mechanical coupling of the actuation ball to the sense element reduces coupling errors and keeps mechanical hysteresis to a minimum ? product rating of 20 million mctf at 25 c [77 f], subject to applica tion variation, provides for consistent output over time and reduces repairs or replacements ? small size minimizes space on the printed circuit board (pcb) ? provides enhanced sensitivity without compromising signal integrity, resulting in low system noise an d reducing measurement errors ? electrically ratiometric output accommodates supply voltage variations, leading to low ratiometricity error ? low voltage supply allows for use in many battery powered applications ? high resistance to electrostatic discharge (esd ) meets esd sensitivity classification level 3b (8 kv), reducing special handling during assembly ? sensor output has low sensitivity to many mounting stresses potential applicatio ns medical ? infusion pumps ? ambulatory non - invasive pumps ? occlusion detecti on ? kidney dialysis machines ? enteral pumps industrial ? load and compression sensing ? variable tension control ? robotic end - effectors ? wire bonding equipment
fss - smt series 2 sensing.honeywell.com table 1. performance characteristics (at 10 0.01 vdc, 25 c [77 f] . ) 1 characteristic uni t fss005wns x f ss010wnsx fss015wns x fss020wns x min. typ. max. min. typ. max. min. typ. max. min. typ. max. force sensing range n 0 to 5 0 to 10 0 to 15 0 to 20 excitation 2 vdc 3.3 10 12.5 3.3 10 12.5 3.3 10 12.5 3.3 10 12.5 null offset 3 mv - 30 0 +30 - 30 0 +30 - 30 0 +30 - 30 0 +30 null shift 4 (25 to 0, 25 to 50 c) mv ? 0.5 ? ? 0.5 ? ? 0.5 ? ? 0.5 ? span 5 mv 330 360 390 330 360 390 330 360 390 330 360 390 linearity (bfsl) 6 % span ? 0.5 ? ? 0.5 ? ? 0.5 ? ? 0.5 ? sensitivity 7 mv/v/n 6.6 7.2 7 .8 3.3 3.6 3.9 2.2 2.4 2.6 1.65 1.8 1.95 sensitivity shift 8 (25 c to 0, 25 c to 50 c) % span ? 5.0 ? ? 5.0 ? ? 5.0 ? ? 5.0 ? repeatability 9 % span ? 0.2 ? ? 0.2 ? ? 0.2 ? ? 0.2 ? response time (10 %fs to 90 %fs) ms ? 0.1 0.5 ? 0.1 0.5 ? 0.1 0.5 ? 0.1 0.5 input resistance k 4.0 5.0 6.0 4.0 5.0 6.0 4.0 5.0 6.0 4.0 5.0 6.0 output resistance k 4.0 5.0 6.0 4.0 5.0 6.0 4.0 5.0 6.0 4.0 5.0 6.0 plunger deflection m ? 26 ? ? 2 8 ? ? 3 3 ? ? 3 0 ? overforce 10 n ? ? 15 ? ? 30 ? ? 45 ? ? 60 notes: 1. all force - related specifications are established using dead weight or compliant force. 2. the range of voltage excitation which can be supplied to the product to produce an output which is proportional to force but due to ratiometricity errors may not remain within the specified performance limits. non - compensated force sensors, excited by constant current (1.5 ma) instead of voltage, exhibit partial temperature compensation of span. 3. the output signal obtained when the zero force is applied to the sensor. also known as "null" or "zero". 4. the c hange in the null resulting from a change in temperature. it is not a predictable error as it can shift up and down from unit to unit. change in temperature causes the entire output curve to shift up or down along the voltage axis. 5. the algebraic difference between output signals measured at the upper and lower limits of the operating force range. also known as "full scale output" or simply "span". 6. the maximum deviation of product output from a straight line fitted to output measured over the operating force range . it is also t he straight line through a set of points which minimizes the sum of the square of the deviations of each of the points from the straight line. 7. t he ratio of output signal change to the corresponding input force change. sensitivity is det ermined by computing the ratio of span to the specified operating force range multiplied by the supply voltage being used. 8. the maximum deviation in sensitivity due to changes in temperature over the operating temperature range, relative to sensitivity meas ured at 25 c. 9. the maximum difference between output readings when the same force is applied consecutively, under the same operating conditions, with force approaching from the same direction within the operating force range. 10. the maximum force which may sa fely be applied to the product for it to remain in specification once force is returned to the operating force range. exposure to higher forces may cause permanent damage to the product. unless otherwise specified, this applies to all temperatures within t he operating temperature range. caution exceeding product overforce rating ? ensure the overforce ratings given in table 1 are not exceeded during any phase of sensor assembly to the board, as well as during the use of the sensor in the application. failure to comply with these instructions may result in product damage . table 2. environmental specifications characteristic parameter operating temperature 1 - 40 c to 85 c [ - 40 f to 185 f ] shock qualification tested to 150 g vibration qualification tes ted to 0 to 2 khz, 20 g sine mctf 2 ( mean cycles to failure ) 20 million at 25 c [77 f] output ratiometric within supply range notes: 1. the temperature range over which the product may safely be exposed without excitation or force applied. under these conditions the product will remain in specification after excursion to any temperatures in this range. exposure to temperatures beyond this range may cause permanent damage to the product. 2. mctf is a basic measure of reliability for a non - repairable device. it is the mean number of cycles to maximum operating force over which a sensor can be expected to operate until failure. the mean value is determined statistically from a probability distribution for failures based upon test data. mctf may vary depending on the spe cific application in which a sensor is utilized.
low profile force sensor honeywell sensing and control 3 table 3. absolute maximum ratings 1 characteristic parameter storage temperature 2 - 40 c to 100 c [ - 40 f to 212 f] solderability 3 10 s at 260 c [500 f] esd meets esd sensitivity classification level 3b notes: 1. t he extreme limits that the product can withstand without damage to the product . 2. the temperature range over which the product may safely be exposed without excitation or force applied. under these condition s, the product will remain in the spec ification after excursions to any temperature in this range. exposure to temperatures beyond this range may cause permanent damage to the product. 3. the maximum temperature and time to which the product may be exposed for processing the solder electrical con nections. figure 1 . excitation schematic ( excitation 5 vdc typ., 6 vdc max. ) 1. circled numbers refer to sensor terminals (pins). pin 1 = supply vs (+) , pin 2 = output vo (+) , pin 3 = ground vg ( - ) , pin 4 = output vo ( - ) 2. the f orce sensor may be powered by voltage or current. maximum supply voltage is not to exceed 6 v. maximum supply current is not to exceed 1.2 ma. power is applied across pin 1 and pin 3. 3. the sensor output should be measured as a differential voltage across pi n 2 and pin 4 (vo = vo(+) - vo( - )). the output is ratiometric to the supply voltage. shifts in supply voltage will cause shifts in output. neither pin 2 nor pin 4 should be tied to ground or voltage supply. figure 2 . sensor mounting d iagram (f or r eference o nly : mm/[in] . ) fss005wn sx , fss010wnsx, fss015wn sx , fss020wn sx suggested land pattern force sensing ra nge ball (actuator) height 0 n to 5 n 0.375 0.10 mm [0.0148 0.0039 in] 0 n to 10 n 0.452 0.10 mm [0. 0178 0.0039 in] 0 n to 15 n 0.504 0.10 mm [0.01984 0.0039 in] 0 n to 20 n 0.562 0.10 mm [0.0221 0.0039 in] figure 3. packaging dimensions (for r eference o nly . ) short tube: 43,9 mm [1.73 in] long, 5 units/tube standard tube: 584 mm [22.99 in] long, 10 0 units/ tube tape and reel (mm) 1. pocket position relative to sprocket hole measured as true position of pocket, not pocket hole. 2. 10 sprocket hole pitch cumulative tolerance is 0.2 mm. ? camber is in compliance with eia 481. ? ao and bo are calculated on a plane at a distance r above the bottom of the pocket. v s 1 3 4 2 + - v o + - 1 , 9 0 [ 0 . 0 7 4 ] 3 , 8 0 [ 0 . 1 5 0 ] 1 5 , 2 5 [ 0 . 6 0 0 ] 1 1 , 4 0 [ 0 . 4 4 9 ] 1 , 6 0 [ 0 . 0 6 3 ]
sensing and control honeywell 1 985 douglas drive north golden valley, mn 55422 sensing.ho neywell.com 0 8028 1 - 2 - en february 2013 ? 2013 honeywell international inc . all rights reserved. o rder guide catalog l isting description fs s 0 05 wn g b fs s - smt series low profile force sensor, 0 n to 5 n force sensing range, short tube packaging fs s 0 05 wn gr fss - smt series low profile force sensor , 0 n to 5 n force sensing range, tape and reel packaging fs s 0 05 wn gt fss - smt series low profile force sensor, 0 n to 5 n force sensing range, standard tube packaging fs s 0 10 wn g b fss - smt series low profile force sensor, 0 n to 10 n force sensing range, sho rt tube packaging fs s 0 10 wn gr fss - smt series low profile force sensor, 0 n to 10 n force sensing range, tape and reel packaging fs s 0 10 wn gt fss - smt series low profile force sensor, 0 n to 10 n force sensing range, standard tube packaging fs s 0 15 wn g b fss - sm t series low profile force sensor, 0 n to 15 n force sensing range, short tube packaging fs s 0 15 wn gr fss - smt series low profile force sensor, 0 n to 15 n force sensing range, tape and reel packaging fs s 0 15 wn gt fss - smt series low profile force sensor, 0 n to 15 n force sensing range, standard tube packaging fs s 0 20 wn g b fss - smt series low profile force sensor, 0 n to 20 n force sensing range, short tube packaging fs s 0 20 wn gr fss - smt series low profile force sensor, 0 n to 20 n force sensing range, tape and r eel packaging fs s 0 20 wn gt fss - smt series low profile force sensor, 0 n to 20 n force sensing range, standard tube packaging warning misuse of documentat ion ? the information presented in this product sheet is for reference only. do not use this documen t as a product installation guide. ? complete installation, operation, and maintenance information is provided in the instructions supplied with each product. failure to comply with these instructions could result in death or serious injury. w arranty/remed y honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. honeywells standard product warranty applies unless agreed to otherwise by honeywell in writing; please refer to your order acknowledgement or consu lt your local sales office for specific warranty details. if warranted goods are returned to honeywell during the period of coverage, honeywell will repair or replace, at its option, without charge those items it finds defective. the foregoing is buyers s ole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. in no event shall honeywell be liable for consequential, special, or indirect damages. while we provide appli cation assistance personally, through our literature and the honeywell web site, it is up to the customer to determine the suitability of the product in the application. specifications may change without notice. the information we supply is believed to be accurate and reliable as of this printing. however, we assume no responsibility for its use. warning personal injury do not use these products as safety or emergency stop devices or in any other application where failure of the product could resul t in personal injury. failure to comply with these instructions could result in death or serious injury. sales and service honeywell serves its customers through a worldwide network of sales offices, representatives and distributors. for application assi stance, current specifications, pricing or name of the nearest authorized distributor, contact your local sales office or: e - mail : info.sc@honeywell.com internet: sensing. honeywell.com phone and fax: asia pacific +65 6355 - 2828 +65 6445 - 3033 fax europe +44 (0) 1698 481 481 +44 (0) 1698 481676 fax latin america +1 - 305 - 805 - 8188 +1 - 305 - 883 - 8257 fax usa/canada +1 - 800 - 537 - 6945 +1 - 815 - 235 - 6847 +1 - 815 - 235 - 6545 fax
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