{"product_id":"yokogawa-exaph202-analytical-transmitter-modules","title":"Yokogawa EXAPH202  Analytical Transmitter Modules","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa EXA PH202\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eEXA PH202\u003c\/strong\u003e 2-Wire pH\/ORP Analyzer, operates as a dedicated hardware component for electrochemical potential evaluation, real-time hydronium ion activity tracking, and localized transmitter signal processing within industrial loop networks.\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\u003eEXA PH202\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.60 kg standard enclosure baseline mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard field-mount housing dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-10 to +55 deg C (14 to +131 deg F) ambient range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e24 VDC loop-powered execution bounds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e-2 to 16 pH | -1500 to 1500 mV ORP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-30 to +140 deg C (-22 to +284 deg F) sensor tracking window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Signal\u003c\/td\u003e\n\u003ctd\u003e4-20 mA DC loop-powered, isolated from input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±0.01 pH | ±1 mV ORP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Compensation\u003c\/td\u003e\n\u003ctd\u003ePt100, Pt1000 standard RTD elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocols\u003c\/td\u003e\n\u003ctd\u003eHART, PROFIBUS-PA, FOUNDATION Fieldbus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP65 ingress protection rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAnalytical Transmitter Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eProcess Control \u0026amp; DCS Instrumentation Rails\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20 mA HART Loop Protocol and FOUNDATION Fieldbus Connectivity\u003c\/strong\u003e The analyzer utilizes an integrated hybrid modem assembly to overlay digital communication frames onto standard analog loops. Field operators can pull parametric diagnostic tables, structural calibration offsets, and secondary temperature variables directly via the 4-20 mA HART loop protocol, or bind the module natively into decentralized FOUNDATION Fieldbus and PROFIBUS-PA fieldbus network topologies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel-to-Channel Isolation and Cold Junction Compensation\u003c\/strong\u003e Complete internal galvanic separation barriers isolate the high-impedance pH\/ORP glass electrode inputs from the loop power output tracks. This topology suppresses dynamic plant ground loops and stray electrostatic field interferences, protecting the low-voltage analog conversion pathways and keeping the baseline processing steps true to the absolute ±0.01 pH precision matrix.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the internal temperature compensation framework handle sensor calibration over extended temperature ranges?\u003c\/p\u003e\n\u003cp\u003eA: The analyzer logic scans continuous resistance changes from an embedded Pt100 or Pt1000 element located within the electrode body. It references Nernst equation correction curves automatically at the physical hardware tier, neutralizing measurement drift caused by temperature variations across the full -30 to +140 deg C process boundary.\u003c\/p\u003e\n\u003cp\u003eQ: What are the installation limitations regarding hot-swapping or disconnecting the sensor cable loop while active?\u003c\/p\u003e\n\u003cp\u003eA: The analyzer is powered entirely via the 24 VDC analog signal loop. Disconnecting the sensor input lines while the loop is active will not destroy the solid-state logic, but it will open the loop and force the DCS interface to report a permanent high-scale error state.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":45103259287667,"sku":"EXAPH202","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-06-15_14-19-11_8c6aed4c-9664-4eb7-a3e3-9daf04c93296.png?v=1781507849","url":"https:\/\/www.dcssupplier.com\/products\/yokogawa-exaph202-analytical-transmitter-modules","provider":"DcsSupplier Limited","version":"1.0","type":"link"}