Polarographic Oxygen Electrodes

Instech's Clark style polarographic electrode measures 1.625" (41.3 mm) long by 0.125" (3.2 mm) in diameter. The cathode is an exposed section of 0.005" (0.1 mm) pure platinum wire in a fused glass seal. For a description of how this electrode works, please see our Tech Support section.

To prepare the electrode, a sheet of polyethylene membrane material is sealed with an o-ring over a drop of KCl solution on the electrode tip. Each electrode includes a cable which is attached to the electrode and sealed to prevent salt contamination, a sleeve to use the electrode in our chamber system, a sleeve to use the electrode outside the chamber, extra membrane material and o-rings, a membrane installation tool, and polishing paper and Scotch-Brite for maintaining the electrode.

There are three models of this electrode:

• 125/05 - Standard electrode with cable for Instech amplifiers
• 125/05Y - Standard electrode with cable for YSI Model 5300 amplifiers (replaces YSI part numbers 5357 and 5358)
• 125/05D - Standard electrode with cable for Diamond General Chemical Microsensor

NOTE: The polarographic systems have been discontinued and replaced with fiber optic fluorescence lifetime systems. However, Instech will continue to manufacture electrodes and related components to support existing customers.

U.S. Pricing

Download

polarographic oxygen system information [PDF]