CS6512W-SE Potassium Ion Electrode

Short Description:

Specifications:
Type: PVC membrane ion-selective electrode Measurement range: 0.04–39000 mg/L Temperature range: 0–50 °C Pressure tolerance: Not pressure resistant Temperature sensor: None Electrode mode: Single measuring electrode(used with a matching reference electrode) Housing material: PVC Connection thread: PG13.5 Cable length: 5 m or as agreed Cable termination: Tinned or as agreed.
The core of a modern potassium ISE is typically a polymer-based liquid membrane or a valinomycin-based PVC membrane. Valinomycin, a natural ionophore, exhibits exceptional selectivity for potassium ions over other common cations like sodium (Na⁺), which is critical for accurate measurements in complex matrices such as blood or soil extracts. The electrode operates on the potentiometric principle: when immersed in a sample, the selective binding of K⁺ ions at the membrane-solution interface generates a measurable potential difference. This potential, measured against a stable reference electrode, follows the Nernst equation and is logarithmically proportional to the potassium ion activity.