{"product_id":"cole-parmer-refillable-probe-potassium-ion-selective-electrode","title":"Cole-Parmer Refillable Probe Potassium Ion Selective Electrode","description":"\u003ch3\u003eCole-Parmer Refillable Double-Junction Potassium Ion-Selective Electrode (27504-26)\u003c\/h3\u003e\n\u003cp\u003eThe Cole-Parmer Refillable Potassium Ion-Selective Electrode (27504-26) is a precision laboratory sensor designed for fast, accurate measurement of free potassium ion (K+) concentration in aqueous solutions, agricultural runoff, environmental water, and food\/beverage samples. Featuring a durable PVC polymer membrane sensing element and a refillable double-junction reference design, this electrode minimizes sample contamination and junction clogging when testing complex or high-ionic-strength matrices. The double-junction architecture allows users to choose customized outer reference filling solutions, preventing silver ions from reacting with sample components. Equipped with a standard BNC connector and a 3-foot cable, the 27504-26 seamlessly integrates with standard benchtop or portable pH\/mV meters and dedicated ISE meters featuring a direct concentration readout option.\u003c\/p\u003e\n\u003ch3\u003eTechnical Performance \u0026amp; Structural Attributes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePolymer Membrane Technology: High-selectivity PVC membrane provides rapid millivolt response times and accurate potassium detection across wide concentration ranges.\u003c\/li\u003e\n\u003cli\u003eRefillable Double-Junction Reference System: Prevents precipitation and clogging at the liquid junction while prolonging electrode lifespan through simple reference electrolyte replenishment.\u003c\/li\u003e\n\u003cli\u003eChemical-Resistant Epoxy Body: Durable outer body sleeve shields internal glass stem and reference assembly against mechanical impact and harsh field conditions.\u003c\/li\u003e\n\u003cli\u003eUniversal BNC Connector: Includes a low-noise coaxial 3-foot cable terminated with a universal BNC plug for instant compatibility with analytical ISE\/pH instrumentation.\u003c\/li\u003e\n\u003cli\u003eOptimized Interference Resistance: Formulated to deliver high selectivity for potassium ions in the presence of common background cations like sodium, ammonium, and calcium.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCatalog \/ Part Number: 27504-26\u003c\/li\u003e\n\u003cli\u003ePrimary Manufacturer: Cole-Parmer\u003c\/li\u003e\n\u003cli\u003eEquipment Category: Analytical Sensor \/ Ion-Selective Electrode (ISE)\u003c\/li\u003e\n\u003cli\u003eSensor Type: Potassium ($K^+$) Ion-Selective Combination Electrode\u003c\/li\u003e\n\u003cli\u003eSensing Element Material: PVC Polymer Membrane\u003c\/li\u003e\n\u003cli\u003eReference Junction Type: Refillable Double-Junction (Porous Ceramic)\u003c\/li\u003e\n\u003cli\u003eMeasurement Range: 0.04 ppm to 39,000 ppm ($1 \\times 10^{-6}$ M to 1.0 M)\u003c\/li\u003e\n\u003cli\u003eSlope \/ Nernstian Response: 54 to 59 mV per decade concentration change at 25 degrees C\u003c\/li\u003e\n\u003cli\u003eInterferences: Cs+, Rb+, NH4+, Tl+, Na+ (Selectivity coefficients apply)\u003c\/li\u003e\n\u003cli\u003eOperating Temperature Range: 0 to 40 degrees C (32 to 104 degrees F)\u003c\/li\u003e\n\u003cli\u003eBody Material \u0026amp; Dimensions: Epoxy Body; 12 mm OD x 120 mm Length\u003c\/li\u003e\n\u003cli\u003eCable \u0026amp; Connector: 3 ft (0.9 m) Coaxial Cable with Standard Male BNC Plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Benefits \u0026amp; Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAgriculture \u0026amp; Soil Analysis: Essential for measuring available potassium levels in soil extracts, fertilizer formulations, and irrigation water.\u003c\/li\u003e\n\u003cli\u003eFood \u0026amp; Beverage Quality Control: Enables rapid quantification of potassium content in wine, fruit juices, dairy products, and processed food products.\u003c\/li\u003e\n\u003cli\u003eEnvironmental \u0026amp; Process Monitoring: Accurately monitors industrial wastewater effluent, river monitoring networks, and boiler feed water systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003csmall\u003eAll product names, logos, and brands are property of their respective owners. Cole-Parmer is a registered trademark of Cole-Parmer Instrument Company, LLC.\u003c\/small\u003e\u003c\/p\u003e","brand":"Cole-Parmer","offers":[{"title":"Default Title","offer_id":67911414743292,"sku":"11047","price":213.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0627\/8463\/5132\/files\/cole-parmer-refillable-probe-potassium-ion-selective-electrode-other-leads-probes-cole-parmer-377956.jpg?v=1792800349","url":"https:\/\/lifesciencestrading.com\/products\/cole-parmer-refillable-probe-potassium-ion-selective-electrode","provider":"Life Sciences Trading","version":"1.0","type":"link"}