www.sensirion.com version 1. 9 C ju ly 201 5 1 / 10 sdp600 series (sdp6 xx /5xx ) low - cost digital differential pressure sensor ? accuracy better than 0.2% fs near zero ? digital output (i 2 c) ? excellent repeatability, even below 10 pa ? calibrated and temperature compensated ? excellent long - term stability ? flow m easurement in bypass configuration product summary the sdp600 sensor family is sensirions series of digital differential pressure sensors designed for high - volume applications. they measure the pressure of air and non - aggressive gases with superb ac curacy and no offset drift. the sensors cover a pressure range of up to 500 pa (2 inch h 2 o / 5 mbar) and deliver outstanding accuracy even at the bottom end of the measuring range. the sdp600 series operates from a 3.3v supply voltage and features a dig ital 2 - wire interface, which makes it easy to connect directly to a microprocessor. the signal is internally linearized and temperature compensated . the outstanding performance of these sensors is based on sensirions patented cmosens ? sensor technology , which combines the sensor element, signal processing and digital calibration on a tiny microchip. the differential pressure is measured by a thermal sensor element using flow - through technology. compared with membrane - based sensors, the sdp600 features an extended dynamic range , better long - term stability , and improved repeatability, especially near zero. the well - proven cmos technology is perfectly suited for high - quality mass production and is the ideal choice for demanding and cost - sensitive oem applicat ions . applications ? medical ? hvac ? automotive ? process automation ? burner control oem options a variety of custom options can be implemented for high - volume oem applications. ask us for more information. sensor chip the sdp600 series features a fourth - generation silicon sensor chip called sf04. in addition to a thermal mass flow sensor element, the chip contains an amplifier, a/d converter, eeprom memory, digital signal processing circuitry, and interface. the highly sensitive chip requires only a minus cule amount of gas flow through the sensor.
www.sensirion.com version 1. 9 C ju ly 201 5 2 / 10 1. sensor performanc e 1.1 physical specifications 1 1 unless otherwise noted, all sensor specifications are valid at 25c with vdd = 3.3 v and absolute pressure = 966 mbar. 2 the sdp50x/sdp51x sensors can detect negative differential pressures in the ra nge of - 500 to 0pa. a negative differential pressure is represented by a negative value. the accuracy of the negative differential pressure is not specified and might have significant inter - sensor variation. 3 please see chapter 5.3 for details. 4 see application note for response times with other resolutions, e.g. 1.3 ms with 10 bits. 5 with 12 - bit resolution; includes repeatability and hysteresis. 6 total accuracy/repeatability is a sum of zero - point and span a ccuracy/repeatability. parameter sdp600 - 500pa sdp610 - 500pa sdp600 - 125pa sdp610 - 125pa sdp600 - 25pa sdp610 - 25pa sdp601 sdp611 sdp500 sdp510 sdp501 sdp511 short description standard low dp lowest dp mass flow low cost low cost mass flow calibrated range 2 C 500 pa to + 500 pa ( 2.0 in. h 2 o) C 125 pa to + 125 pa ( 0.5 in. h 2 o) C 25 pa to + 25 pa ( 0.1 in. h 2 o) C 500 to + 500 pa ( 2.0 in. h 2 o) 0 pa to +500 pa (0 to 2.0 in. h 2 o) temp erature - compensation yes yes yes mass flow 3 yes m ass flow 3 resolution 12 bits preset 4 (adjustable from 9 to 16 bit) zero point accuracy 5 , 6 0.2 pa 0.1 pa 0.2 pa span accuracy 5 , 6 3% of reading 4.5% of reading zero point repeatability 5 , 6 0.1 pa 0.05 pa 0.03 pa 0.1 pa span repeatability 5 , 6 0.5% of reading offset shift due to temperature variation none (less than resolution) span shift due to temperature variation < 0.5% of reading per 10c offset stability < 0.1 pa/year response t ime 4 4.6 ms typical at 12 - bit resolution warm - up time for first reliable measurement typ. 50 ms (first measurement typically after 16 ms)
www.sensirion.com version 1. 9 C ju ly 201 5 3 / 10 1.2 ambient conditions parameter sdp 5xx / sdp6xx series calibrated for 7 air, n 2 m edia compatibility air, n 2, o 2 calibrated temperature range - 20 c to +8 0 c operating temperature - 20 c to +80 c storage temperature 7 - 40 c to +80 c position sensitivity less than repeatabili ty error 1.3 materials parameter sdp5xx / sdp6xx series wetted materials pbt (polybutylene terephthalate), glass (silicon nitride, silicon oxide), silicon, gold, fr4, silicone as static sealing, epoxy, copper alloy, lead - free solder reach, rohs reach and rohs compliant 2. electrical specifications parameter sdp5xx / sdp6xx operating voltage 3.0 C 3.6 v (a supply voltage of 3.3 v is recommended) current drain < 6 ma typical in operation interface digital 2 - wire interface (i 2 c) bus clock frequency 100 khz typical, 400 khz max. default i 2 c address 64 (binary: 1000 000) scale factor 8 sdp6xx - 500pa & sdp5xx 60 pa - 1 sdp 6x0 - 125pa 240 pa - 1 sdp6x0 - 25pa 1200 pa - 1 scale factor to alternative units 9 for all 500 pa versions: 6000 mbar - 1 413686 psi - 1 14945 (inch h 2 o) - 1 sdp 6x0 - 125pa 24000 mbar - 1 1'654744 psi - 1 59780 (inch h 2 o) - 1 sdp6x0 - 25pa 120000 mbar - 1 8273719 psi - 1 298900 (inch h 2 o) - 1 7 contact sensirion for information about other gases, wider calibrated temperature ranges and higher storage temperatures. 8 see section 5.1 . the scale factor may vary with other configur ations. 9 instead of the standard scale factor (to get the physical value in pa), the sensor output may be divided by alternative scale factors to receive the physical value in another unit.
www.sensirion.com version 1. 9 C ju ly 201 5 4 / 10 3. interface specifications the serial interface of the sdp600 series is compatible with i 2 c interfaces. for d etailed specifications of the i 2 c protocol, see the i2c bus specification (source: nxp). 3.1 interface connection C external components bi - directional bus lines are implemented by the devices (master and slave) using open - drain output stages and a pull - up re sistor connected to the positive supply voltage. the recommended pull - up resistor value depends on the system setup (capacitance of the circuit or cable and bus clock frequency). in most cases, 10 k is a reasonable choice. the capacitive load s on sda and scl line have to be the same. it is important to avoid asymmetric capacitive loads. i 2 c transmission start condition both bus lines, sda and scl, are bi - directional and therefore require an external pull - up resistor. 3.2 i 2 c add ress the i 2 c address consists of a 7 - digit binary value. by default, the i 2 c address is set to 64 (binary: 1000 000) . the address is always followed by a write bit (0) or read bit (1). the default hexadecimal i 2 c header for read access to the sensor is the refore h81. 3.3 transfer sequences transmission start condition (s): the start condi - tion is a unique situation on the bus created by the master, indicating to the slaves the beginning of a transmission sequence (the bus is considered busy after a start). i 2 c transmission start condition a high to low transition on the sda line while scl is high transmission stop condition (p): the stop condition is a unique situation on the bus created by the master, indicating to the slaves the end of a transmission sequence (the bus is considered free after a stop). i 2 c transmission stop condition a low to high transition on the sda line while scl is high. acknowledge (ack) / not acknowledge (nack): each byte (8 bits) transmitted over the i 2 c bus is followed by an acknowledge condition from the receiver. this means that after the master pulls scl low to complete the transmission of the 8th bit, sda will be pulled low by the receiver during the 9th bit time. if aft er transmission of the 8th bit the receiver does not pull the sda line low, this is considered to be a nack condition. if an ack is missing during a slave to master transmission, the slave aborts the transmission and goes into idle mode. i 2 c acknowledge / not acknowledge each byte is followed by an acknowledge or a not acknowledge, generated by the receiver handshake procedure (hold master): in a master - slave system, the master dictates when the slaves will receive or transm it data. however, in some situations a slave device may need time to store received data or prepare data to be transmitted. therefore, a handshake procedure is required to allow the slave to indicate termination of internal processing. i 2 c hold master after the scl pulse for the acknowledge signal, the sdp600 series sensor (slave) can pull down the scl line to force the master into a wait state. by releasing the scl line, the sensor indicates that its internal processing is c ompleted and transmission can resume. (the bold lines indicate that the sensor controls the sda/scl lines.) sda scl vdd master slave ( sdp 600 ) rp rp s start condition sda scl p stop condition sda scl ack scl r / _ w d 7 d 0 ack sda not acknowledge acknowledge ack scl r / _ w d 7 d 0 ack sda hold master : sck line pulled low data ready : sck line released
www.sensirion.com version 1. 9 C ju ly 201 5 5 / 10 3.4 data transfer format data is transferred in byte packets in the i 2 c protocol, which means in 8 - bit frames. each byte is followed by an acknowledge bit. data is transferred with the most significant bit (msb) first. a data transfer sequence is initiated by the master generating the start condition (s) and sending a header byte. the i 2 c header consists of the 7 - bit i 2 c device address and the data dir ection bit (r/_w). the value of the r/_w bit in the header determines the data direction for the rest of the data transfer sequence. if r/_w = 0 (write) the direction remains master - to - slave, while if r/_w = 1 (read) the direction changes to slave - to - mast er after the header byte. 4. command set and data transfer sequences a command is represented by an 8 - bit command code. the data direction may not change after the command byte, since the r/_w bit of the preceding i 2 c header has already determined the directi on to be master - to - slave. in order to execute commands in read mode using i 2 c, the following principle is used. on successful (acknowledged) receipt of a command byte, the sensor stores the command nibble internally. the read mode of this command is then i nvoked by initiating an i 2 c data transfer sequence with r/_w = 1. if a correctly addressed sensor recognizes a valid command and access to this command is granted, it responds by pulling down the sda line during the subsequent scl pulse for the acknowledge signal (ack). otherwise it leaves the sda line unasserted (nack). the two most important commands are described in this data sheet, and the data transfer sequences are specified. contact sensirion for advanced sensor options. 4.1 measurement triggering each individual measurement is triggered by a separate read operation. note that two transfer sequences are needed to perform a measurement. first write command byte hf1 (trigger measurement) to the sensor, and then execute a read operation to trigger the meas urement and retrieve the flow or differential pressure information. on receipt of a header with r/_w=1, the sensor generates the hold master condition on the bus until the first measurement is completed. after the hold master condition is released, the ma ster can read the result as two consecutive bytes. a crc byte follows if the master continues clocking the scl line after the second result byte. the sensor checks whether the master sends an acknowledge after each byte and aborts the transmission if it do es not. i 2 c measurement 8 - bit command code: hf1 command: trigger differential pressure measurement hatched areas indicate that the sensor controls the sda line . note that the first measurement result after reset is not va lid . 4.2 soft reset this command forces a sensor reset without switching the power off and on again. on receipt of this command, the sensor reinitializes the control/status register contents from the eeprom and starts operating according to these settings. i 2 c soft reset 8 - bit command code: hfe command: soft reset 4.3 crc - 8 redundant data transmission cyclic redundancy checking (crc) is a popular technique used for error detection in data transmission. the transmitter appends an n - b it checksum to the actual data sequence. the checksum holds redundant information about the data sequence and allows the receiver to detect transmission errors. the computed checksum can be regarded as the remainder of a polynomial division, where the divi dend is the binary polynomial defined by the data sequence and the divisor is a generator polynomial. the sensor implements the crc - 8 standard based on the generator polynomial x 8 + x 5 + x 4 +1. note that crc protection is only used for date transmitted f rom the slave to the master. for details regarding cyclic redundancy checking, please refer to the relevant literature. 1 3 1 2 1 8 1 9 2 2 2 1 2 7 m s b y t e m e a s d a t a l s b y t e m e a s d a t a 1 1 1 4 1 5 1 6 1 7 2 0 2 3 2 4 2 5 2 6 a c k a c k 2 8 3 1 3 0 3 6 c h e c k b y t e 2 9 3 2 3 3 3 4 3 5 1 2 3 4 5 6 7 8 a c k 9 1 8 s i 2 c a d r a c k s a c k w 1 2 3 4 5 6 7 8 9 1 0 h o l d m a s t e r p a c k 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 1 1 1 0 0 0 1 c o m m a n d 1 0 0 0 0 0 0 r 1 0 0 0 0 0 0 i 2 c a d r 0 1 1 2 3 4 5 6 7 8 s 9 a c k a c k 1 8 s y s t e m r e b o o t 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 i 2 c a d r w 1 0 0 0 0 0 0 1 1 1 1 c o m m a n d 1 1 1 0 0
www.sensirion.com version 1. 9 C ju ly 201 5 6 / 10 5. conversion to physical values 5.1 signal scaling and physical unit the calibrated signal read fr om the sensor is a signed integ er number (tw o's complement number). the integer value can be converted to the physical value by dividing it by the scale factor (pressure = sensor output ? scale factor). the scale factor is specified in section 2 . 5.2 temperature compensatio n the sdp600 sensor series features digital temperature compensation. the temperature is measured on the cmosens ? chip by an on - chip temperature sensor. this data is fed to a compensation circuit that is also integrated on the cmosens ? sensor chip. no exte rnal temperature compensation is necessary. 5.3 mass flow temperature compensation a sensor output proportional to mass flow is necessary for measuring mass flow in a bypass configuration. even though the output of the sdp sensors with mass flow temperature co mpensation is still differential pressure, the temperature compensation is adapted especially for mass flow measurements in a bypass configuration. at calibration temperature both calibrations are equivalent. please find the application note bypass config uration differential pressure sensor sdpxxx on our website . 5.4 altitude correction the sdp600 sensor series achieves its unsurpassed performance by using a dynamic measurement principle. the applied differential pressure forces a small flow of gas through th e sensor, which is measured by the flow sensor element. as a result, any variation in gas density affects the sensor reading. while temperature effects are compensated internally, variations in atmospheric pressure (elevation above sea level) can be compen sated by a correction factor according to the following formula: dp eff = dp sensor ? (p cal / p amb ) dp eff : effective differential pressure dp sensor : differential pressure indicated by the sensor p cal : absolute pressure at calibration (966 mbar) p amb : actual ambient absolute pressure. altitude correction factors: altitude [meters] ambient pressure (p amb ) [mbar] correction factor (p cal / p amb ) 0 1013 0.95 250 984 0.98 425 966 1.00 500 958 1.01 750 925 1.04 1500 842 1.15 2250 766 1.26 3000 697 1.38 exa mple: at 750 m above sea level and a sensor reading of 40 pa, the effective differential pressure is 41.8 pa. note: in many hvac applications such as air flow measurement in a bypass configuration, the described dependence on absolute pressure is actually welcome because the quantity that must effectively be controlled is the mass flow and not the volume flow . mas s flow is dependent on differential pressure and absolute pressure. for details please refer to our application note measuring flow in a bypass c onfiguration. 6. oem options a variety of custom options can potentially be implemented for high - volume oem applications. contact sensirion for more information.
www.sensirion.com version 1. 9 C ju ly 201 5 7 / 10 7. mechanical specifications 7.1 mechanical concept the sdp600 series is designed for through - hole te chnology and can be wave - soldered or hand - soldered to a pcb. ? the sdp6 0 x /sdp5 0x can be directly connected to a manifold using two o - rings. ? the sdp61 x /sdp51 x sensors have ports for connecting standard - size plastic tubes. 7.2 mechanical characteristics parameter pcb attachment clip - in and hand or wave soldering. additional mechanical attachment depending on force requirements allowable overpressure 1 bar (100 kpa, 400 inches h 2 o) rated burst pressure > 5 bar gas flow through sensor < 150 ml/min weight < 6 g protection rating ip 30 7.3 sdp60 x /sdp50 x C manifold connection figure 1 : sdp60 x /sdp50 x manifold mount version. all dimensions are in mm. sensirion recommends o - rings with the following dimensions: d 1 : 3 C 2 : 2 mm figure 2 : cross section of recommended o - ring 7.4 sdp61 x /sdp51 x C tube connection figure 3 : sdp61 x /sdp51 x version with ports for tube connection. all dimensions are in mm. 7.5 pin assignments figure 4 : digital output pin assignments (bottom view). 7.6 footprint figure 5 : footprint for pcb mounting. (top view = sensor side). all dimensions in mm. a: overall sensor dimensions b: holes for additional mounting screws (optio nal)
www.sensirion.com version 1. 9 C ju ly 201 5 8 / 10 8. instructions for use 8.1 soldering instructions standard wave soldering systems may be used for soldering sdp600 series sensors. reflow soldering is not feasible and may damage the sensor. the sensor ports must be protected from solder splash and flux dur ing soldering. figure 6 shows an appropriate temperature profile with maximum temperature values. figure 6 : suitable wave soldering profile. the characteristics of wave soldering machines vary, so any soldering setup must be tested before production use. 8.2 sensor handling the sensors of the sdp600 series are designed to be robust and vibration resistant. nevertheless, the accuracy of the high - precision sdp600 series can be degraded by rough handling. sens irion does not guarantee proper operation in case of improper handling. note: a void applying any mechanical stress to the solder joints of the sensor during or as a result of pcb assembly. the sensor ships in an antistatic package to prevent electrostatic discharge (esd), which can damage the part. to avoid such damage, ground yourself using a grounding strap or by touching a grounded object. furthermore store the parts in the antistatic package when not in use. 8.3 additional attachment if necessary, the robu stness of the sensor attachment to the pcb can be increased by using a bracket as shown in figure 7. sensirion recommends using this additional bracket when the sensor is fitted to a pcb. the bracket must be secured before the pins are soldered to the pcb , as otherwise sensor performance may be degraded by mechanical stress. figure 7 : supplementary bracket for the sdp600 series. 8.4 air flow and tubing due to the dynamic measurement principle, a small air f low is required. figure 8 : typical air flow through the sdp6 0 0 series sensor . note: 1 sccm = 1 cm3/min at 0c and 1013 mbar (1 sccm = 0.001 standard liter). this air flow through the sensor creates a dependence on t he tube length. the error is less than 1% with a tube length up to 1 m (with 3/16 inch inside diameter). 0 - 120 +120 - 600 +600 0 pressure difference (pa) flow (ml/min) 200c 150c 100c 50c 0c 250c start flux zone preheat zone entrance to solder wave exit from solder wave solder wave peak temp. max. 260c max 145c approx. pcb bottom - side temp. pcb top - side temperature approx. 1 min (time in wave < 2 s)
www.sensirion.com version 1. 9 C ju ly 201 5 9 / 10 9. ordering information use the part names and item numbers shown in the following table when ordering sdp600 series differential pressure sensors. for t he latest product information and local distributors, visit www.sensirion.com . part name description / output calibrated range mass flow span accuracy product number 1 - 10 x xxx - xx sdp500 i 2 c, manifold mount 0 t o +500 pa (0 to +2 in. h 2 o) 4.5% 0 601 - 0 2 sdp510 i 2 c, tube connection 0 to +500 pa (0 to +2 in. h 2 0) 4.5% 0 602 - 0 2 sdp501 i 2 c, manifold mount 0 to +500 pa (0 to +2 in. h 2 o) x 4.5% 1314 - 01 sdp511 i 2 c, tube connection 0 to +500 pa (0 to +2 in. h 2 0) x 4. 5% 1315 - 01 sdp600 - 500pa i 2 c, manifold mount 500 pa ( 2 in. h 2 o) 3% 0456 - 02 sdp610 - 500pa i 2 c, tube connection 500 pa ( 2 in. h 2 0) 3% 0455 - 02 sdp600 - 125pa i 2 c, manifold mount 12 5 pa ( 0.5 in. h 2 o) 3% 0760 - 02 sdp610 - 125pa i 2 c, tube connection 12 5 pa ( 0.5 in. h 2 0) 3% 0761 - 02 sdp600 - 25pa i 2 c, manifold mount 2 5 pa ( 0.1 in. h 2 o) 3% 0758 - 02 sdp610 - 25pa i 2 c, tube connection 2 5 pa ( 0.1 in. h 2 0) 3% 0759 - 02 sdp601 - 500pa i 2 c, manifold mount 500 pa ( 2 in. h 2 o) x 3% 0603 - 02 sdp611 - 500pa i 2 c, tube connection 500 pa ( 2 in. h 2 0) x 3% 0604 - 02 packaging units: 80 items/tray and 480 items/box . 9.1 packaging housing: the sensor housing consists of pbt. the device is fully rohs compliant C it is free of pb, cd, hg, cr(6+), pbb and pbde. each sens or is labeled by laser printing on the front side: ? sensor type ? sensirion product number ? serial number figure 9 : marking of the housing. traceability information: sdpxxx are shipped in trays of 80pcs. the tray dimension is 355mm x 255mm x 21.5mm. by piling them up, the height per tray can be considered as 19mm. for traceability, each tray is marked with a label. no information can be derived from the code directly, respective data is stored at se nsirion ag and is provided upon request. ? sensor type ? sensirion item number ? lot number ? number of sensors inside tray ? barcode of lot number figure 10 : label sticking on each tray revision hist ory date author version changes sept , 2008 pha v1.0 initial release nov, 2008 pha v1.1 small amendments (power consumption, asymmetric lines and us office address) jan, 2009 pha v1.2 explanation to sdp5x0 calibration range, media compatibility extended feb, 2009 pha v1.3 packaging information added, sensor handling instruction nov, 2009 pha v1.4 zero point accuracy changed. supply voltage requirements and recommendations relaxed. januar y , 2011 dat v1.5 introduction of low power versions(sdp6x6) and low differential pressure versions sdp6xx - 125pa / sdp6xx - 25pa. feb, 2011 vvo v1.6 calibrated temperature range is extended, minor corrections sept, 2012 anb v1.7 updated product number. june, 2015 anb v1.8 added sdp5x1. moved sdp6x6 to separate datashee t. minor updates. july, 2015 anb v1.9 fixed broken link in chapter 5. sdpxxx ? 1 - 10x xxx - 0 x ? xxxxxxxx ? 80 ? ? sensirion sdpxxx ? pn: 1 - 10 x xxx - 0 x ? sn: xxxxxxxxxx ?
www.sensirion.com version 1. 9 C ju ly 201 5 10 / 10 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 perso nal 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 thes e 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, subsidiarie s, 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 sensirio n 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. see application note handling instructions for more information. warranty sensirion warrants solely to the original purchaser of this product for a period of 12 months (one year) f rom the date 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 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 satisfacti on, to have 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 unexpi red portion 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 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 de clined. 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 witho ut 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 5 , sen sirion. cmosens ? is a trademark of sensirion all rights reserved 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 sensiri on japan co. ltd. phone: +81 3 3444 4940 info@sensirion.co.jp www.sensirion.co.jp sensirion korea co. ltd. phone: +82 31 337 7700~3 info@sensirion.co.kr www.sensirion.co.kr sensirion china co. ltd. phone: +86 755 8252 1501 info@sensirion.com.cn www.se nsirion.com .cn sensirion ag (germany) phone: +41 44 927 11 66 info@sensirion.com www.sensirion.com to find your local representative, please visit www.sensirion.com/contact
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