These sintered Silver-Silver Chloride (Ag/AgCl) electrodes incorporate a fine grain, homogeneous mixture of Silver and Silver Chloride. They are reusable, never need rechloriding, and are essentially non-polarizable. Sintered Ag/AgCl electrodes are known for their low offset voltage, low noise, and stability and can be used indefinitely with minimal care. The electrode is 12 mm in diameter x 1 mm in thickness. Ag-AgCl Sintered Silver Disk Electrode with 6 mm inner diameter. Electrodes are encapsulated in durable housings: 1m (40 inches long) PVC insulated lead wires Terminated with a 1.5mm DIN safety socket. Electrical Specifications:* DC offset Voltage: 180 V Drift: 25 V/hr Noise: 1 V p-p (0.1-1 kHz with 50 Hz eliminated). *Typical values of the key parameters, measured in 0.9% saline, between pairs of Ag-AgCl electrodes of the same size.