• Measures gas and dissolved oxygen 
• Low O₂ consumption 
• 2 mm tip

Electrically isolated, the electrode can function in recording situations where ground-referred electrodes would fail. Isolation prevents adverse interaction with other electrodes and instruments. Highly accurate and stable ISO2 measures oxygen concentrations in aqueous solutions and in gas mixtures. Measurement modes are percent oxygen, parts per million, and oxygen reduction current in nanoamperes.

The lower detection limit (DL) for ISO2 (in gaseous or in liquid phase) is 0.1 ppm or 0.1%. Oxygen concentration around 0.5 ppm or 0.5% and up can be routinely measured in the gaseous or in the liquid phases.

DL for a particular sensor tends to be different in gaseous and liquid phases when the baseline noise level is also different. In the case of ISO2, however, the baseline noise level is very close whether the electrode is immersed in solution or used in the gaseous phase, so DL for the ISO2 remains relatively close in either phase.

The small tip size (2 mm diameter) and low oxygen consumption of the OXEL-1 electrode make it ideal for measurements in vivo or in vitro. With a T-Adapter (Part # 5399), the sensor probe can be used also for continuous-flow monitoring of oxygen in small fluid volumes. OXEL-1 also features a fast response time, typically 10 seconds, and the rugged stainless steel sleeve covering the sensor is autoclavable. Optional BNC-to-double banana adaptor (Part # 13347) and BNC cable (Part #2851) allow ISO2 to be connected directly to your chart recorder. A spare membrane sleeve is included with each OXEL-1 electrode. A start-up kit, with filling solution, filling syringe, and calibration bottle is included