{"product_id":"industrial-s-30974-coulometric-current-source-instrument","title":"Industrial S-30974 Coulometric Current Source Instrument","description":"\u003cdiv\u003e\u003cp\u003eIndustrial S-30974 Coulometric Current Source Instrument is the Sargent Coulometric Current Source, Model IV, manufactured by E. H. Sargent \u0026amp; Co. of Chicago, as indicated by the model designation and part number. This vintage instrument was designed to provide a stable, constant current for coulometric work and is documented in historical electrochemistry literature as a dedicated current source used during coulometric titration and related experiments. In a published setup, the Model IV delivered currents around 9.65 mA with a 20 cm^2 electrode area, yielding a current density of roughly 0.48 mA\/cm^2, illustrating its role in controlling electrolysis in small-volume cells. Archival references describe the device as a purpose-built coulometric current source rather than a general-purpose source measure unit, reflecting mid-century lab instrumentation design for precise current control. \u003c\/p\u003e\u003c\/div\u003e","brand":"Sargent","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46284050268394,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-022.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/industrial-s-30974-coulometric-current-source-instrument","provider":"GTG Hardware","version":"1.0","type":"link"}