{"id":3562,"date":"2026-01-16T10:22:35","date_gmt":"2026-01-16T10:22:35","guid":{"rendered":"https:\/\/pondus-instruments.com\/?p=3562"},"modified":"2026-01-16T10:22:36","modified_gmt":"2026-01-16T10:22:36","slug":"arbetsprincip-for-trycktransmitter","status":"publish","type":"post","link":"https:\/\/pondus-instruments.com\/sv\/knowledge\/pressure-transmitter-working-principle\/","title":{"rendered":"Arbetsprincip f\u00f6r trycktransmitter\u00a0"},"content":{"rendered":"<p class=\"wp-block-paragraph\">En trycktransmitter fungerar genom att omvandla det fysiska trycket i en gas eller v\u00e4tska till en standardiserad elektrisk signal (oftast 4-20 mA, ofta med HART eller MODBUS p\u00e5 toppen). I de flesta industriella konstruktioner avb\u00f6jer processtrycket ett metallmembran, den kraften \u00f6verf\u00f6rs till ett sensorelement (ofta piezoresistivt) och inbyggd elektronik linj\u00e4riserar, temperaturkompenserar och skalar signalen till den valda utg\u00e5ngen.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vad en trycktransmitter g\u00f6r i en mening&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tryck \u2192 membranr\u00f6relse \u2192 sensorn \u00e4ndras elektriskt \u2192 elektroniken korrigeras + skala \u2192 utsignal.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Det \u00e4r den grundl\u00e4ggande principen oavsett om du m\u00e4ter \u00f6vertryck, absolut tryck, differenstryck, niv\u00e5 (hydrostatiskt tryck) eller fl\u00f6de (via DP).&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">De viktigaste byggstenarna i en trycktransmitter&nbsp;<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1) Processanslutning och membran (den \u201cv\u00e5ta \u00e4nden\u201d)&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trycket fr\u00e5n processen verkar p\u00e5 ett membran (vanligen rostfritt st\u00e5l, Hastelloy, tantal, guldpl\u00e4terade alternativ f\u00f6r speciella medier). Membranet \u00e4r konstruerat f\u00f6r att vara robust och, i m\u00e5nga sanit\u00e4ra\/smutsiga applikationer, format f\u00f6r att motst\u00e5 skador och vara l\u00e4ttare att reng\u00f6ra.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Varf\u00f6r det \u00e4r viktigt: Membranet \u00e4r den f\u00f6rsta f\u00f6rsvarslinjen - dess material och geometri avg\u00f6r till stor del korrosionsbest\u00e4ndighet, reng\u00f6rbarhet och \u00f6verlevnad i slipande eller klibbiga medier.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2) Tryck\u00f6verf\u00f6ring (ofta oljefylld)&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e5nga industriella transmitters anv\u00e4nder en liten intern volym fylld med silikonolja mellan membran och sensor. N\u00e4r trycket pressar membranet \u00f6verf\u00f6r oljan trycket till det avk\u00e4nnande elementet samtidigt som det isoleras fr\u00e5n processmediet. Eftersom fyllnadsvolymen kan vara mycket liten blir membranr\u00f6relserna mycket sm\u00e5 och prestandan kan bli stabil.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vissa konstruktioner \u00e4r \u201cdirekta\u201d i den meningen att processanslutningen \u00e4r integrerad utan externa t\u00e4tningar eller komplicerade tryckf\u00f6rmedlare, vilket minskar felk\u00e4llorna och f\u00f6rb\u00e4ttrar robustheten.&nbsp;&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3) Det avk\u00e4nnande elementet (d\u00e4r trycket omvandlas till en elektrisk f\u00f6r\u00e4ndring)&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En mycket vanlig teknik \u00e4r piezoresistiv avk\u00e4nning. Tryckinducerad mekanisk belastning \u00e4ndrar motst\u00e5ndet hos element som \u00e4r anordnade i en Wheatstone-brygga, vilket ger en liten millivoltsignal som \u00e4r proportionell mot trycket.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Det finns andra avk\u00e4nningsprinciper (kapacitiv, resonans etc.), men piezoresistiv anv\u00e4nds ofta eftersom den ger en stark signal, bra dynamisk respons och god noggrannhet i kombination med kompensationselektronik.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4) Referenstryck: manometer vs absolut&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En transmitter m\u00e5ste veta vad den m\u00e4ter&nbsp;<em>i f\u00f6rh\u00e5llande till<\/em>:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Manometertryck (relativt): refererat till omgivande atmosf\u00e4r. Vanligtvis \u00e4r sensorns baksida ventilerad s\u00e5 att transmittern ger ut \u201ctryck \u00f6ver atmosf\u00e4r\u201d.\u201d\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Absolut tryck: refererat till ett f\u00f6rseglat vakuum (ingen atmosf\u00e4risk ventil).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Praktisk l\u00e4rdom: M\u00e4tartransmittrar m\u00e5ste h\u00e5lla ventilations-\/referensv\u00e4gen fri och skyddad fr\u00e5n fukt och blockering; absoluta versioner undviker detta men m\u00e4ter absolut tryck, inte \u201c\u00f6vertryck\u201d.\u201d&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5) Signalkonditionering och digital bearbetning (s\u00e4ndardelen)&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Den r\u00e5a bryggsignalen \u00e4r liten och temperaturk\u00e4nslig. Moderna s\u00e4ndare anv\u00e4nder d\u00e4rf\u00f6r mikroprocessorbaserad elektronik f\u00f6r att:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>f\u00f6rst\u00e4rka och digitalisera sensorsignalen\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>m\u00e4ta temperatur (ofta h\u00e4rledd fr\u00e5n sensorns egenskaper och\/eller en temperatursensor)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>till\u00e4mpa temperaturkompensation och icke-linj\u00e4ritetskorrigering med hj\u00e4lp av kalibreringsdata som lagrats fr\u00e5n fabrikskalibreringen\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>till\u00e4mpa skalnings- och \u00f6verf\u00f6ringsfunktioner (linj\u00e4r, kvadratrot etc.)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>generera den slutliga utg\u00e5ngen som 4-20 mA och som tillval exponera digitala v\u00e4rden via HART eller MODBUS\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Det \u00e4r d\u00e4rf\u00f6r en transmitter \u00e4r mer \u00e4n en \u201csensor\u201d: den ger en stabil, standardiserad m\u00e4tning som en PLC\/DCS kan lita p\u00e5.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Arbetsprincip f\u00f6r differentialtryckstransmitter (DP)&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En differenstrycktransmitter m\u00e4ter skillnaden mellan tv\u00e5 tryck: P(+) - P(-).&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hur DP skapas fysiskt inuti s\u00e4ndaren&nbsp;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">En vanlig DP-arkitektur anv\u00e4nder:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>tv\u00e5 separationsmembran (ett f\u00f6r varje sida)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>oljefyllda kammare och kapill\u00e4rer som \u00f6verf\u00f6r tryck till en central givare\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ett \u00f6verbelastningsmembran som begr\u00e4nsar hur mycket differenstryck som faktiskt n\u00e5r sensorn vid \u00f6verbelastningsh\u00e4ndelser\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Varf\u00f6r \u00f6verbelastningsskydd \u00e4r en stor sak i DP&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I verkliga anl\u00e4ggningar kan den ena sidan se spikar, linjeslag eller felaktig ventilsekvensering. Konceptet med \u00f6verbelastningsmembran g\u00f6r att transmittern kan tolerera \u00f6verbelastning genom att mekaniskt f\u00f6rhindra obegr\u00e4nsad differenskraft \u00f6ver sensorn.&nbsp;&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">D\u00e4r DP-transmittrar anv\u00e4nds mest:&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>fl\u00f6desm\u00e4tning genom en \u00f6ppning\/venturi\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>filter\u00f6vervakning (\u0394P stigande = igens\u00e4ttning)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>niv\u00e5 i trycksatta\/slutna tankar (DP skiljer statiskt tryck fr\u00e5n hydrostatiskt huvud)\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Om du beh\u00f6ver digital DP med flera utg\u00e5ngar\/kommunikation \u00e4r PT600RSH ett typiskt exempel i Pondus-serien&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ett praktiskt exempel: niv\u00e5m\u00e4tning med hj\u00e4lp av tryck (hydrostatisk princip)&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f6r en \u00f6ppen tank \u00e4r niv\u00e5n proportionell mot bottentrycket:&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>P=\u03c1\u22c5g\u22c5hP = \\rho \\cdot g \\cdot h<\/em>P=\u03c1\u22c5g\u22c5h&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f6r en trycksatt tank \u00e4r det b\u00e4sta s\u00e4ttet ofta differentialniv\u00e5: m\u00e4t trycket i botten (statiskt + huvudtryck) och subtrahera trycket i gasutrymmet (statiskt). Det \u00e4r precis den typen av anv\u00e4ndningsfall d\u00e4r DP-transmittrar (eller tv\u00e5 l\u00e4nkade sensorer) anv\u00e4nds.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f6r sanit\u00e4r, trycksatt tankniv\u00e5 med fj\u00e4rranslutning \u00e4r transmitters som PT60 typ T konstruerade f\u00f6r att m\u00e4ta differentialtryck via plus\/minus-membran och en kapill\u00e4r till minussidan.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">F\u00f6r dr\u00e4nkbar niv\u00e5m\u00e4tning \u00e4r samma tryck-till-signal-princip f\u00f6rpackad i en sond, t.ex. (\u201cLT100\u2033linkhere) eller (\u201cLT10\u2033linkhere), d\u00e4r membranet k\u00e4nner av hydrostatiskt tryck och elektroniken kompenserar och matar ut 4-20 mA (ofta med HART p\u00e5 vissa modeller).&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Varf\u00f6r temperatur, montering och kapill\u00e4rer kan p\u00e5verka avl\u00e4sningarna&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c4ven med kompensation \u00e4r installationer viktiga:&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperaturgradienter i omgivningen kan p\u00e5verka kapill\u00e4rfyllda system om kapill\u00e4ren och s\u00e4ndarhuset har olika temperaturer (detta \u00e4r vanligast i differential-\/fj\u00e4rrmonterade system).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Effekter av monteringsorientering\/h\u00f6jdtryck kan f\u00f6rskjuta \u201cnollan\u201d f\u00f6r DP-\/niv\u00e5inst\u00e4llningar (s\u00e4rskilt n\u00e4r plus- och minusportarna sitter p\u00e5 olika h\u00f6jd).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>F\u00f6r\u00e4ndringar i det statiska trycket kan tillf\u00e4lligt p\u00e5verka DP-avl\u00e4sningarna om en sida reagerar snabbare \u00e4n den andra (kapill\u00e4rdynamik).\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Detta \u00e4r ocks\u00e5 anledningen till att m\u00e5nga moderna s\u00e4ndare har ett bekv\u00e4mt s\u00e4tt att \u00e5terst\u00e4lla nollst\u00e4llningen efter installation eller underh\u00e5ll.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nollf\u00f6rskjutning och \u201cautozero\u201d (vad det \u00e4r och varf\u00f6r det finns)&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Med tiden kan en transmitter uppvisa en liten nollpunktsf\u00f6rskjutning p\u00e5 grund av monteringssp\u00e4nningar, membraneffekter efter reng\u00f6ring eller mindre mekanisk p\u00e5verkan. Vissa transmitters har en autozero-funktion som g\u00f6r att du snabbt kan \u00e5terst\u00e4lla 4 mA-punkten till det avsedda tillst\u00e5ndet \u201cnolltryck\u201d - utan att beh\u00f6va g\u00f6ra det i styrsystemet.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Exempel som beskrivs i Pondus dokumentation \u00e4r att autozero initieras med en knapptryckning eller genom att kortsluta specifika stift\/kablar under en viss tid.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Om din applikation inneb\u00e4r frekventa tv\u00e4ttar\/CIP eller risk f\u00f6r tillf\u00e4llig p\u00e5verkan av membranet, \u00e4r det v\u00e4rt att \u00f6verv\u00e4ga transmitters med en enkel nollst\u00e4llningsmetod i f\u00e4lt, t.ex. PT600 eller PT03RS, beroende p\u00e5 r\u00e4ckvidd och gr\u00e4nssnittsbehov.&nbsp;&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Viktiga faktorer att ta h\u00e4nsyn till vid val av trycktransmitter&nbsp;<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Mediekompatibilitet&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>val av membranmaterial (korrosion, n\u00f6tning, hygienisk \u00f6verensst\u00e4mmelse)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>risk f\u00f6r v\u00e4tejonseffekter i vissa medier (kan ibland hanteras med s\u00e4rskilda membranalternativ)\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Trycktyp och referens&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>m\u00e4tare vs absolut\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DP vs enkelt tryck\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Omr\u00e5de och \u00f6verbelastning&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u00e4lj ett intervall d\u00e4r normal drift ligger bekv\u00e4mt inom spannet\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>s\u00e4kerst\u00e4lla att \u00f6verbelastningsklassificeringarna motsvarar verkliga uppr\u00f6rdheter (s\u00e4rskilt f\u00f6r DP)\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Produktion och integration&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Endast 4-20 mA\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>4-20 mA + HART\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MODBUS\/RS485 d\u00e4r s\u00e5 \u00e4r l\u00e4mpligt\u00a0<br>Exempel p\u00e5 transmittrar med flera gr\u00e4nssnitt beskrivs i dokumentationen f\u00f6r PT600-familjen.\u00a0\u00a0<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Installationens realiteter&nbsp;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>temperaturgradienter (s\u00e4rskilt med kapill\u00e4rer)\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>avluftningsbehov f\u00f6r m\u00e4tomvandlare\u00a0<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vibrations-, spol- och reng\u00f6ringsrutiner\u00a0<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Slutsats och CTA&nbsp;<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Arbetsprincipen f\u00f6r en trycktransmitter \u00e4r enkel - membranets avb\u00f6jning omvandlas av en sensor till en elektrisk signal, som sedan kompenseras av elektronik och omvandlas till en standardutg\u00e5ng som 4-20 mA (med digital kommunikation som tillval). Den verkliga prestandan kommer fr\u00e5n hur v\u00e4l membranet, tryck\u00f6verf\u00f6ringsmetoden, sensortekniken och kompensationselektroniken matchar dina medier, temperaturf\u00f6rh\u00e5llanden och installation.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Har du fler fr\u00e5gor eller beh\u00f6ver du v\u00e4gledning f\u00f6r att v\u00e4lja r\u00e4tt trycktransmitter? Kontakta Pondus Instruments, s\u00e5 hj\u00e4lper vi dig att hitta den l\u00f6sning som b\u00e4st passar dina behov.&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>A&nbsp;pressure&nbsp;transmitter&nbsp;works&nbsp;by&nbsp;converting&nbsp;the&nbsp;physical&nbsp;pressure&nbsp;of&nbsp;a gas or&nbsp;liquid&nbsp;into&nbsp;a&nbsp;standardized&nbsp;electrical&nbsp;signal&nbsp;(most&nbsp;commonly&nbsp;4\u201320 mA,&nbsp;often&nbsp;with&nbsp;HART&nbsp;or&nbsp;MODBUS&nbsp;on&nbsp;top). In&nbsp;most&nbsp;industrial&nbsp;designs, the process&nbsp;pressure&nbsp;deflects&nbsp;a&nbsp;metal&nbsp;diaphragm,&nbsp;that&nbsp;force is transferred to a&nbsp;sensor element&nbsp;(often&nbsp;piezoresistive), and&nbsp;onboard&nbsp;electronics&nbsp;linearize,&nbsp;temperature-compensate, and&nbsp;scale&nbsp;the signal to the chosen output.&nbsp;&nbsp; What&nbsp;a&nbsp;pressure&nbsp;transmitter is&nbsp;doing&nbsp;in&nbsp;one&nbsp;sentence&nbsp; Pressure&nbsp;\u2192&nbsp;diaphragm&nbsp;movement&nbsp;\u2192 sensor&nbsp;changes&nbsp;electrically&nbsp;\u2192&nbsp;electronics&nbsp;correct&nbsp;+&nbsp;scale&nbsp;\u2192&nbsp;output signal.&nbsp; That\u2019s&nbsp;the&nbsp;core&nbsp;principle&nbsp;whether&nbsp;you\u2019re&nbsp;measuring&nbsp;gauge&nbsp;pressure, absolute&nbsp;pressure, differential&nbsp;pressure,&nbsp;level&nbsp;(hydrostatic&nbsp;pressure), or&nbsp;flow&nbsp;(via DP).&nbsp; The&nbsp;main&nbsp;building&nbsp;blocks inside a&nbsp;pressure&nbsp;transmitter&nbsp; 1) Process&nbsp;connection&nbsp;and&nbsp;diaphragm&nbsp;(the \u201cwet&nbsp;end\u201d)&nbsp; The&nbsp;pressure&nbsp;from the process&nbsp;acts&nbsp;on a&nbsp;diaphragm&nbsp;(commonly&nbsp;stainless&nbsp;steel,&nbsp;Hastelloy,&nbsp;tantalum,&nbsp;gold-plated&nbsp;options for special media). The&nbsp;diaphragm&nbsp;is&nbsp;designed&nbsp;to be robust and, in&nbsp;many&nbsp;sanitary\/dirty&nbsp;services,&nbsp;shaped&nbsp;to&nbsp;resist&nbsp;damage&nbsp;and be&nbsp;easier&nbsp;to&nbsp;clean.&nbsp;&nbsp; Why&nbsp;it&nbsp;matters:&nbsp;the&nbsp;diaphragm&nbsp;is the&nbsp;first&nbsp;line&nbsp;of&nbsp;defense\u2014its&nbsp;material and&nbsp;geometry&nbsp;largely&nbsp;decide&nbsp;corrosion&nbsp;resistance,&nbsp;cleanability, and&nbsp;survivability&nbsp;in&nbsp;abrasive&nbsp;or&nbsp;sticky&nbsp;media.&nbsp; 2)&nbsp;Pressure&nbsp;transfer (often&nbsp;oil-filled)&nbsp; Many&nbsp;industrial&nbsp;transmitters&nbsp;use&nbsp;a [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3562","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"_links":{"self":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3562","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/comments?post=3562"}],"version-history":[{"count":1,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3562\/revisions"}],"predecessor-version":[{"id":3563,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/posts\/3562\/revisions\/3563"}],"wp:attachment":[{"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/media?parent=3562"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/categories?post=3562"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pondus-instruments.com\/sv\/wp-json\/wp\/v2\/tags?post=3562"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}