{"product_id":"11ah-bs2-11a-foxboro-series-pneumatic-pressure-transmitters","title":"11AH-BS2 11A Foxboro Series Pneumatic Pressure Transmitters","description":"\u003ch2\u003eFoxboro 11AH-BS2 11A Series Pneumatic Absolute Pressure Transmitter\u003c\/h2\u003e\n\u003cp\u003eConfigured for precise absolute pressure measurement in process loops, the \u003cstrong\u003eFoxboro 11AH-BS2\u003c\/strong\u003e (\u003cstrong\u003e11AH\u003c\/strong\u003e Pneumatic Absolute Pressure Transmitter) provides direct physical\/electrical execution. The instrument converts process pressure displacement into a standard 3 to 15 psi (20 to 100 kPa) pneumatic output signal via an internal force-balance mechanism. Featuring a 316 stainless steel capsule material and 1\/2 NPT process connection, the hardware operates with an air consumption rate of 0.42 m3\/h (0.25 cfm) at standard conditions under a constant 20 psi (140 kPa) regulated air supply.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e11AH:\u003c\/strong\u003e Base module series designating pneumatic absolute pressure transmitters using force-balance mechanics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eB:\u003c\/strong\u003e Span limits covering 0.14 to 1.4 MPa (20 to 200 psi \/ 1.4 to 14 bar).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS:\u003c\/strong\u003e Capsule material constructed from 316 stainless steel for chemical resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2:\u003c\/strong\u003e Process connection tapped for 1\/2 NPT female conduit fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e11AH-BS2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFoxboro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.5 kg (9.9 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 11A Series enclosure dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade operating range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e0.42 m3\/h (0.25 cfm) air consumption at standard conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003ePneumatic Absolute Pressure Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Signal\u003c\/td\u003e\n\u003ctd\u003e0 to 25 PSIA (span limit 20 to 200 PSI, range limit up to 350 PSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e3 to 15 psi (20 to 100 kPa \/ 0.2 to 1.0 bar) pneumatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Pressure\u003c\/td\u003e\n\u003ctd\u003e20 psi (140 kPa) clean, dry instrument air\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapsule Material\u003c\/td\u003e\n\u003ctd\u003e316 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess Connection\u003c\/td\u003e\n\u003ctd\u003eTapped for 1\/2 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir Connections\u003c\/td\u003e\n\u003ctd\u003eSupply and output ports tapped for 1\/4 NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eDirect or bracket mount on vertical\/horizontal 50 mm (2 in) pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; Field Instrument Architecture\u003c\/h3\u003e\n\u003cp\u003eThe transmitter integrates directly into legacy process control schemes by converting absolute line pressures into modulated pneumatic signals without electronic component reliance. Analog signal conditioning occurs strictly via mechanical force balancing, eliminating electrical noise and grounding loop issues associated with typical 4-20 mA HART loop protocol wiring or FOUNDATION Fieldbus connectivity. The mechanical capsule assembly provides inherent isolation against process fluid temperature spikes while maintaining zero shift stability. By eliminating electronic cold junction compensation and digital converter latencies, the unit responds continuously to fluid pressure shifts across the full 20 to 200 psi span.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What instrument air quality parameters are necessary to maintain proper flapper-nozzle alignment?\u003c\/p\u003e\n\u003cp\u003eA: The supply air line requires dry, oil-free instrument air filtered to prevent orifice clogging and mechanical drift across the internal force-balance mechanism.\u003c\/p\u003e\n\u003cp\u003eQ: How does the mechanical force-balance system isolate the output signal from line vibration?\u003c\/p\u003e\n\u003cp\u003eA: The rigid 316 stainless steel capsule and balanced flexure pivot design damp out high-frequency pipe vibrations before pressure forces reach the nozzle-flapper assembly.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePipe Mounting Stability:\u003c\/strong\u003e Secure the mounting bracket to a nominal 50 mm (2 in) vertical or horizontal pipe, verifying the bracket bolts are torqued down to prevent mechanical flex.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePneumatic Connection Sealing:\u003c\/strong\u003e Apply PTFE tape strictly to male 1\/4 NPT air connection threads, ensuring the first two leading threads remain bare to prevent internal orifice contamination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Line Engagement:\u003c\/strong\u003e Engage process piping into the 1\/2 NPT tapped port with a minimum of 5 full turns of thread engagement to guarantee pressure-tight operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir Supply Regulation:\u003c\/strong\u003e Set the main upstream air filter-regulator to supply a steady 20 psi (140 kPa) before bleeding air into the transmitter housing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpulse Line Venting:\u003c\/strong\u003e Vent air or process fluid trapped inside the impulse lines prior to locking in atmospheric zero settings on the force bar adjustment screw.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":43969176961114,"sku":"11AH-BS2","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/461_065f596b-0669-48c9-9489-1e1dd77d33fe.jpg?v=1788163804","url":"https:\/\/www.spareoil.com\/es\/products\/11ah-bs2-11a-foxboro-series-pneumatic-pressure-transmitters","provider":"SpareOil Automation","version":"1.0","type":"link"}