{"product_id":"51451326-504-honeywell-low-temperature-ph-probe","title":"51451326-504 | Honeywell | Low-Temperature pH Probe","description":"\u003ch2\u003eHoneywell 51451326-504 Low-Temperature pH Probe\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eHoneywell 51451326-504\u003c\/strong\u003e, also cataloged as a \u003cstrong\u003elow‑temperature pH probe\u003c\/strong\u003e, serves as a dedicated electrochemical sensor for aqueous process monitoring in chemical, water treatment, and pharmaceutical systems.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e51451326-504\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003e20 ft (6.10 m) cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temp\u003c\/th\u003e\n\u003ctd\u003e0 to 50 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower Consumption\u003c\/th\u003e\n\u003ctd\u003ePassive sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCore Performance Indicators\u003c\/th\u003e\n\u003ctd\u003eMeasurement range 0–14 pH; response time \u0026lt; 30 s; pressure rating up to 5 bar (72.5 psi); tinned‑lead cable termination; supports in‑line or immersion mounting\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\u003c\/h3\u003e\n\u003cp\u003eWhen paired with Honeywell transmitters (UDA2182, APT2000, APT4000, DirectLine series), the probe integrates into:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4‑20 mA HART loop protocol\u003c\/strong\u003e conversion for distributed control systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel‑to‑channel isolation\u003c\/strong\u003e across multiple probes in shared manifolds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold junction compensation (CJC)\u003c\/strong\u003e applied in transmitter electronics, ensuring stable readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFOUNDATION Fieldbus \/ Profibus PA connectivity\u003c\/strong\u003e supported via associated Honeywell controllers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions (FAQ)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What is the maximum pressure rating?\u003c\/strong\u003e A: The probe supports up to 5 bar (72.5 psi) in aqueous process environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How fast does the probe respond?\u003c\/strong\u003e A: Response time is under 30 seconds, ensuring rapid stabilization during process changes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which controllers are compatible?\u003c\/strong\u003e A: The probe connects directly to Honeywell UDA2182, APT2000, APT4000, and DirectLine series instruments.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall probe in continuous wetting conditions to maintain electrode stability.\u003c\/li\u003e\n\u003cli\u003eAvoid routing cable parallel to high‑voltage conductors to reduce induced noise.\u003c\/li\u003e\n\u003cli\u003eMaintain immersion depth sufficient to cover the reference junction.\u003c\/li\u003e\n\u003cli\u003eRinse electrode with clean water before insertion to prevent contamination.\u003c\/li\u003e\n\u003cli\u003eGround associated transmitters to plant earth to minimize offset errors.\u003c\/li\u003e\n\u003cli\u003eVerify calibration after thermal equilibrium is reached in low‑temperature environments.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":48553614409918,"sku":"51451326-504","price":560.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/1145\/5422\/files\/screenshot_2026-07-13_15-56-40_70af4b76-d976-4f8b-bc2e-4dc517762baa.png?v=1783935543","url":"https:\/\/www.autooiltech.com\/products\/51451326-504-honeywell-low-temperature-ph-probe","provider":"AutoOilTech Limited","version":"1.0","type":"link"}