Miniature SMT Low Pressure Sensors with Wet/Wet Differential 26PC Series, Compensated/Unamplified 1 psi to 15 psi Datasheet Miniature SMT Low Pressure Sensors with Wet/Wet Differential The 26PC Series Miniature Surface Mount Technology (SMT) Low Pressure Sensors are small, cost effective devices intended for use with wet/wet differential sensing. Based on the long established reliability and accuracy of the 26PC Miniature Pressure Sensor single in-line package, the SMT version’s smaller configuration reduces the footprint area on the printed circuit board (PCB), thereby reducing overall PCB size and cost. The sensor is capable of being board mounted with other common SMT devices, helping to eliminate secondary board mounting operations and improving manufacturing productivity. These sensors feature proven sensing technology that uses a specialized piezoresistive micromachined sensing element to offer high performance, reliability, and accuracy. Each sensor contains four active piezoresistors that form a Wheatstone bridge. When pressure is applied, the resistance changes and the sensor provides a milliVolt output signal that is proportional to the input pressure. The low power 26PC sensors are designed to measure pressures from ±1 psi to ±15 psi and have an operating temperature range of -40 ºC to 85 ºC [-40 ºF to 185 ºF]. These sensors can accommodate a variety of wet and dry media that are compatible with polyphthalamide (PPA) plastics and media seals specified in the Nomenclature and Order Guide (see Figure 2). The 26PC sensors are RoHS compliant. They are designed and manufactured according to ISO 9001 standards. What makes our sensors better? 26PCXXSMT • Wet/Wet capability (i.e., liquids on both ports) • Media compatible with many liquids and gases 26PCXXSMTA • Variety of port configurations gives the customer flexibility in making pneumatic connections • Small size reduces PCB layout 26PCXXSMTC WET/WET CapabiliTy • MEDia COMpaibiliTy • MaNy pORTiNG OpTiONS sensing.honeywell.com 2 Features and Benefits Allows differential liquid sensing with one sensor. One sensor does the work of two! TrUe weT/weT differenTiAl MediA SenSing Provides liquid sensing in differential applications wide oPerATing TeMPerATUre rAnge of -40 ºC To 85 ºC [-40 ºf To 185 ºf] Allows use in wide variety of applications VArieTy of PreSSUre rAngeS froM 1 PSi, 5 PSi, 15 PSi Provide flexibility in customers’ pneumatic designs differenTiAl And gAge PreSSUre MeASUreMenT TyPeS in one PACkAge Provides application flexibility Frees up PCB space. Reduces costs. CoMPACT SMT Profile Doesn’t take up a lot of board space in size-critical applications 3,18 MM [0.125 in] diAMeTer PiCk UP feATUre Allows use in pick and place machines MAXiMUM PeAk TeMPerATUre of 260 °C [500 °f] for 10 S MAX. Allows reflow soldering using standard industry solder profiles AlSo AVAilAble in SiP, diP, And flow-ThroUgh PACkAgeS Provides added design flexibility WET/WET CapabiliTy • MEDia COMpaibiliTy • MaNy pORTiNG OpTiONS sensing.honeywell.com 3 Potential Applications MediCAl reSPirATorS And VenTilATorS May be used to measure the correct amount of air going to the patient while in surgery or recovery oXygen ConSerVerS And ConCenTrATorS May be used to measure the sieve bed pressure to help optimize system performance nebUlizerS May be used to measure the amount of air going into a patient’s lungs to help ensure proper therapy indUSTriAl wATer ConTrol VAlVeS May be used to monitor the water consumption in homes and buildings irrigATion eQUiPMenT May be used to control the water pressure and flow being delivered filTer MoniToring May be used to detect when the filters are clogged and need to be replaced PreSSUre VAlVeS May be used to measure and control pressure in industrial processes Air CoMPreSSorS May be used to control the pressure being delivered to the end user equipment SofT drink diSPenSing May be used to ensure the correct amount of beverage is dispensed into the bottle breAThAlizerS May be used to measure the exhalation pressure to ensure proper breath analysis sensing.honeywell.com 4 26PC Series, Compensated/Amplified 1 Table 1. Absolute Maximum ratings Characteristic Min. Typ. Max. Unit note Supply voltage 2.5 10 16 Vdc – Input resistance 5.5 7.5 11.5 kOhm – Output resistance 1.5 2.5 3 kOhm – 2 Response time – – 1 ms 2 1 Absolute maximum ratings are the extreme limits the device will withstand without damage. 2 Time required for the output to increase from 10% to 90% of span in response to a step change in input pressure from the specified min. to max. operating pressure. Table 2. Technical Specifications Characteristic Parameter Operating temperature range: without EPDM seals -40 °C to 85 °C [-40 °F to 185 °F] with EPDM seals -20 °C to 85 °C [-4 °F to 185 °F] Compensated temperature range 0 °C to 50 °C [32 °F to 122 °F] Storage temperature range -55 °C to 100 °C [-67 °F to 212 °F] Soldering terminal temperature/time 260 °C [500 °F] max./10 s max. Vibration 10 G at 20 Hz to 2000 Hz Shock 100 G for 11 ms Life 1 million cycles min. sensing.honeywell.com 5 Miniature SMT Low Pressure Sensors with Wet/Wet Differential Table 3. Performance Specifications (Vcc =10.00 ±0.01 Vdc; Ta = 25 °C [77 °f]) operating Pressure range Characteristic 0 psi to 1 psi 0 psi to 5 psi 0 psi to 15 psi Unit note Typ. Max. Typ. Max. Typ. Max. Span – 16.7 ±2 – 50 ±3 – 100 ±4 mV 1 Null offset – 0 ±2 – 0 ±2 – 0 ±2 mV 2 Linearity (Best Fit Straight Line, 0.5 1.75 0.5 1.5 0.5 1.0 %span 3 P2>P1) Null shift (0 °C to 25 °C; – ±1.0 – ±1.0 – ±1.0 mV 4 25 °C to 50 °C) Span shift (0°C to 25°C; ±1.5 ±4.5 ±1.0 ±1.7 ±0.75 ±1.5 %span 5 25 °C to 50 °C) Repeatability and ±0.2 – ±0.2 – ±0.2 – mV 6 hysteresis Overpressure – 20 – 20 – 45 psi 7 1 Span is the algebraic difference between the output signal measured at the upper and lower limits of the operating pressure range, where Port 2 (P2) > Port 1 (P1). 2 The output signal obtained when zero pressure is applied to all available ports. 3 The maximum deviation of product output from a straight line fitted to the output measured over the specified operating pressure range, calculated according to BFSL. The straight line is fitted along a set of points that minimizes the sum of the square of the deviations of each of the points (“least- squares” method). 4 The maximum deviation in offset due to changes in temperature over the compensated temperature range, relative to offset measured at a reference temperature of 25 °C. 5 The maximum deviation in span due to changes in temperature over the compensated temperature range, relative to full-scale span measured at a reference temperature of 25 °C. 6 Repeatability is the maximum difference between the output readings when the same pressure is applied consecutively, under the same operating conditions, with pressure approaching from the same direction within the specified operating pressure range. Hysteresis is the maximum difference between output readings when the same pressure is applied consecutively, under the same operating conditions, with pressure approaching from opposite directions within the specified operating pressure range. 7 Overpressure is the maximum pressure that may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. Unless otherwise specified, this applies to all available pressure ports at any temperature within the operating temperature range. figure 1. Circuit diagram Symbol description Output “A” increases as P2 pressure increases. Vcc supply Output “B” deceases as P2 pressure increases. OUTPUT A bridge positive output PIN 1 PIN 2 PIN 4 GROUND ground VCC OUTPUT OUTPUT A B OUTPUT B bridge negative output PIN 3 GROUND sensing.honeywell.com 6 26PC Series Miniature SMT Low Pressure Sensors with Wet/Wet 26PC Series, Compensated/Unamplified Differential Sensing, Compensated/Unamplied 1 figure 2. nomenclature and order guide For example,a 26PC01SMTA catalog listing defines a 26PC Series Miniature SMT Low Pressure Sensor with Wet/Wet Differential Sensing, Compensated/Unamplified,1 psi pressure range, port 1 standard and port 2 special port configuration. 26PC 01SMT A Product Series Pressure Range Port Configuration 26PC Series 01 1 psi Port 2 Miniature SMT Port 1: Standard _ 05 5 psi Port 2: Standard Low Pressure Port 1 Sensors with Wet/Wet 15 psi 15 Differential Sensing, Port 2 Port 1: Standard Compensated/ A Port 2: Special Unamplified Port 1 Port 2 1 Every combination may not be possible. Contact customer service. Port 1: Standard C Port 2: Barbed Port 1 figure 3. Mounting dimensions (for reference only: mm/[in].) 26PCXXSMT 26PCXXSMTA Notes: 1. Every combination may not be possible. Contact customer service. 2. 100 psi pressure option is available for C port configuration only. sensing.honeywell.com 7 Miniature SMT Low Pressure Sensors with Wet/Wet Differential figure 3. Mounting dimensions (continued) 26PCXXSMTC figure 4. recommended land Pattern (for reference only: mm/[in].) +0,07 2X 1,00 [0.003] [0.039] 4X 1,83 [0.072] 5,08 ±0,07 0.02 ± [0.039] 6,73 [0.26] 11,23 [0.44] sensing.honeywell.com 8 AddiTionAl inforMATion wArning The following associated literature is available at sensing.honeywell.com: PerSonAl inJUry • Product Line Guide DO NOT USE these products as safety or emergency stop • Product Range Guide devices or in any other application where failure of the product • Product Installation Instructions could result in personal injury. • Application-Specific Information failure to comply with these instructions could result in death or serious injury. • Technical Notes wArning MiSUSe of doCUMenTATion • The information presented in this product sheet is for reference only. Do not use this document 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. wArrAnTy/reMedy Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult 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 buyer’s sole 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 Find out more for consequential, special, or indirect damages. Honeywell serves its customers through a worldwide network While we provide application assistance personally, through our of sales offices, representatives literature and the Honeywell website, it is up to the customer to and distributors. For application determine the suitability of the product in the application. assistance, current specifications, pricing or name of the nearest Specifications may change without notice. The information we Authorized Distributor, contact supply is believed to be accurate and reliable as of this printing. your local sales office. However, we assume no responsibility for its use. To learn more about Honeywell’s sensing and control products, call +1-815-235-6847 or 1-800-537-6945, visit sensing.honeywell.com, or e-mail inquiries to info.sc@honeywell.com Sensing and Control Honeywell 1985 Douglas Drive North 32307745-A-EN GLO Golden Valley, MN 55422 May 2015 © 2015 Honeywell International Inc. All rights reserved. honeywell.com