{"product_id":"horiba-dissolved-oxygen-electrode","title":"Horiba Dissolved Oxygen Electrode","description":"\u003cp\u003eReplacement dissolved oxygen electrodes for HORIBA meters, in laboratory and field configurations. These are membrane-covered electrochemical DO sensors: oxygen diffuses through a gas-permeable membrane and is reduced at the cathode, producing a current proportional to the oxygen concentration in the sample.\u003c\/p\u003e\n\n\u003ch3\u003eLaboratory\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9521-10D\u003c\/strong\u003e (3200891722) — laboratory DO and BOD electrode with integral stirrer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe built-in stirrer is what makes this the right electrode for BOD bottle work. Membrane DO sensors consume oxygen at the membrane face, so a stagnant sample reads progressively lower as a depleted layer builds up. Standard BOD methods therefore require sample movement at the membrane. An integral stirrer guarantees it, in the confined neck of a BOD bottle where an external stirrer will not fit.\u003c\/p\u003e\n\n\u003ch3\u003eField\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e9552-20D\u003c\/strong\u003e (3200780939) — field DO electrode with 2 m cable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9552-50D\u003c\/strong\u003e (3200780941) — field DO electrode with 5 m cable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eChoose the cable length for the depth you need to reach. The 2 m version suits buckets, flow cells and shallow surface water; the 5 m version reaches into tanks, aeration basins, manholes and shallow wells. In still water, move the probe steadily through the sample while reading.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBOD determination in the laboratory to standard methods\u003c\/li\u003e\n\u003cli\u003eWastewater aeration basin and activated sludge process control\u003c\/li\u003e\n\u003cli\u003eSurface water, river and lake dissolved oxygen surveys\u003c\/li\u003e\n\u003cli\u003eAquaculture and fish hatchery oxygen monitoring\u003c\/li\u003e\n\u003cli\u003eGroundwater low-flow purge stabilization\u003c\/li\u003e\n\u003cli\u003eFermentation, brewing and process oxygen checks\u003c\/li\u003e\n\u003cli\u003eStream health and habitat assessment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintenance\u003c\/h3\u003e\n\u003cp\u003eMembranes and electrolyte are consumables, not permanent parts. A DO electrode that is slow to respond, will not hold calibration, or reads erratically almost always needs a fresh membrane and electrolyte rather than a new electrode. Replacement membranes and tips for these models are stocked separately.\u003c\/p\u003e\n\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.horiba.com\/ind\/water-quality\/download\/\"\u003eHORIBA water quality document library — electrode brochures and manuals\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated items\u003c\/h3\u003e\n\u003cp\u003eReplacement DO membranes, electrode tips and stirrer sets are stocked — see the \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba-parts-accessories\"\u003eHoriba Parts \u0026amp; Accessories\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cp\u003eBrowse all \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba\"\u003eHORIBA instruments\u003c\/a\u003e.\u003c\/p\u003e","brand":"Horiba","offers":[{"title":"9521-10D - Laboratory DO \/ BOD Electrode with Stirrer - 3200891722","offer_id":48226403451070,"sku":"3200891722","price":680.0,"currency_code":"USD","in_stock":true},{"title":"9552-20D - Field DO Electrode, 2 m Cable - 3200780939","offer_id":48226403483838,"sku":"3200780939","price":517.0,"currency_code":"USD","in_stock":true},{"title":"9552-50D - Field DO Electrode, 5 m Cable - 3200780941","offer_id":48226403516606,"sku":"3200780941","price":660.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_9521_DO_Electrode_376c6f9f6d.png?v=1785337162","url":"https:\/\/envirotechonline.com\/products\/horiba-dissolved-oxygen-electrode","provider":"EnviroTech Services","version":"1.0","type":"link"}