This Standard Platinum Counter Electrode features a coiled platinum wire (99.99% pure) mounted at the end of a chemically-resistant epoxy rod.  A fritted glass tube isolates the counter electrode from the main test solution.  The glass tube is equipped with a PTFE adapter suitable for mounting the tube in a 14/20 port on our standard electrochemical cells.  Alternatively, the counter electrode may be removed from the glass tube and mounted directly in the electrochemical cell.  The coil is fabricated from a 0.5 mm OD Pt wire that has an approximate surface area of 4.7 cm2.  The approximate diameter of the coil is 9 mm.  The 6.9 mm OD black epoxy rod is 150 mm long.  The overall length of the rod and the coil is approximately 180 mm.