{"product_id":"11ah-bs2-foxboro-pneumatic-absolute-pressure-transmitter","title":"11AH-BS2 | Foxboro | Pneumatic Absolute Pressure Transmitter","description":"\u003cp\u003eConfigured for absolute pressure monitoring in pneumatic control loops, the \u003cstrong\u003eFoxboro 11AH-BS2\u003c\/strong\u003e (\u003cstrong\u003e11AH-BS2\u003c\/strong\u003e Pneumatic Absolute Pressure Transmitter) provides direct mechanical\/pneumatic execution utilizing a force-balance mechanism to convert pressures up to 200 psi into standard pneumatic output signals.\u003c\/p\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\u003eStandard Industrial Manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e4.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard 11A Series Housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +120 deg C\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e20 to 200 psi (0.14 to 1.4 MPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e3 to 15 psi pneumatic (20 to 100 kPa)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eOperating within Foxboro process control environments, the pneumatic transmitter executes continuous pressure conversion without requiring electrical power sources, eliminating electromagnetic interference (EMI) susceptibility and ground loop vulnerabilities common in electronic loops. While purely mechanical and pneumatic in operation, the force-balance capsule design maintains high precision and isolation from supply pressure fluctuations. Integrated vernier adjustment mechanisms allow on-line calibration and zero\/span trimming without disrupting process continuity or requiring external loop shunt barriers.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the 11AH-BS2 transmitter require electrical power or a signal conversion barrier?\u003c\/p\u003e\n\u003cp\u003eA: No. The 11AH-BS2 is a purely pneumatic device operating on a clean, dry instrument air supply (nominal 20 psi) and outputs a standard 3-15 psi pneumatic signal.\u003c\/p\u003e\n\u003cp\u003eQ: Can the span and zero calibration be adjusted while the transmitter is online under pressure?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the built-in vernier adjustment allows technicians to perform on-line calibration checks and minor adjustments without interrupting the active pneumatic control loop.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnsure the instrument air supply is isolated and depressurized before connecting supply lines to the 1\/4 inch NPT port.\u003c\/li\u003e\n\u003cli\u003eApply thread sealant conforming to plant standards to process connection threads, engaging a minimum of 5 full NPT threads (engagement depth standard).\u003c\/li\u003e\n\u003cli\u003eMount the transmitter rigidly to a structural bracket or pipe stand to minimize measurement errors caused by heavy plant vibration.\u003c\/li\u003e\n\u003cli\u003eVerify that supply air pressure is maintained at the nominal 20 psi level using a clean, filtered, and oil-free instrument air source.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Foxboro","offers":[{"title":"Default Title","offer_id":67702866510133,"sku":"11AH-BS2","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/11AH-BS2_Cocoai.png?v=1792043952","url":"https:\/\/www.5gplc.com\/products\/11ah-bs2-foxboro-pneumatic-absolute-pressure-transmitter","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}