{"product_id":"horiba-ph-half-cell-reference-electrode","title":"Horiba pH Half-Cell \u0026 Reference Electrode","description":"\u003cp\u003eSeparate half-cell and reference electrodes for HORIBA meters set up as two-electrode systems. A combination electrode packages both halves into one body; a two-electrode system keeps them apart, which lets you replace only the part that has failed and lets you choose a reference junction suited to a difficult sample.\u003c\/p\u003e\n\n\u003cp\u003eA pH measurement is a voltage between two half-cells: the glass electrode responds to hydrogen ion activity, and the reference electrode holds a fixed, known potential. Most drifting, unstable or slow pH readings originate in the reference — its junction clogs or its internal solution becomes contaminated — not in the glass. Being able to swap the reference alone is why laboratories running awkward samples still prefer two-electrode setups.\u003c\/p\u003e\n\n\u003ch3\u003epH glass half-cell\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1066A-10C\u003c\/strong\u003e (3014080432) — glass pH electrode. Requires a separate reference electrode; compatible references are the 2060A, 2660A and 2565A.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReference electrodes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2060A-10T\u003c\/strong\u003e (3014080434) — single ceramic liquid junction. The standard choice for clean aqueous samples, with a low, stable flow rate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2565A-10T\u003c\/strong\u003e (3014080436) — double liquid junction. The second chamber isolates the internal silver\/silver chloride element from the sample, which prevents silver from precipitating in samples containing sulfides, proteins, heavy metals or tris buffers, and stops sample ions from poisoning the reference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen to choose a double junction\u003c\/h3\u003e\n\u003cp\u003eUse the 2565A-10T if your samples contain sulfide, chloride-sensitive chemistry, protein, or anything that reacts with silver. A single-junction reference in those samples will clog at the junction, drift, and need frequent replacement. The double junction costs more initially but lasts far longer in that service.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLaboratory pH measurement and potentiometric titration\u003c\/li\u003e\n\u003cli\u003eIon-selective electrode measurements needing a dedicated reference\u003c\/li\u003e\n\u003cli\u003eSamples containing sulfides, proteins or heavy metals\u003c\/li\u003e\n\u003cli\u003eWastewater, plating bath and process chemistry analysis\u003c\/li\u003e\n\u003cli\u003eResearch setups where glass and reference are replaced on separate schedules\u003c\/li\u003e\n\u003c\/ul\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\u003eReference electrode filling solutions, pH buffers, storage caps and electrode stands are in 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":"1066A-10C - Glass pH Electrode (Half-Cell) - 3014080432","offer_id":48226383790270,"sku":"3014080432","price":205.0,"currency_code":"USD","in_stock":true},{"title":"2060A-10T - Reference, Ceramic Liquid Junction - 3014080434","offer_id":48226383823038,"sku":"3014080434","price":178.0,"currency_code":"USD","in_stock":true},{"title":"2565A-10T - Reference, Double Liquid Junction - 3014080436","offer_id":48226383855806,"sku":"3014080436","price":227.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_Hero_Image_Laqua_Electrodes_fa1421f961_ed22133b-2d2a-4155-8c9f-0f39bbb388af.jpg?v=1785337369","url":"https:\/\/envirotechonline.com\/products\/horiba-ph-half-cell-reference-electrode","provider":"EnviroTech Services","version":"1.0","type":"link"}