The In-Situ^® Clark cell dissolved oxygen (DO) sensor is a polarographic sensor that contains replaceable membrane and filling solution. Clark cell sensors measure DO indirectly through an electrochemical reaction.

In-Situ offers 1-mil and 2-mil Teflon^® membranes to suit your application requirements.

As an alternative to the Clark cell sensor, use the technologically advanced RDO^® optical DO sensor.

Use the Clark cell DO sensor with the TROLL^® 9500 water quality instrument. The following TROLL 9500 configurations are available:

• TROLL 9500 sub-2" instrument outfitted with Clark cell sensor, turbidity/pressure sensor, conductivity, pH/ORP sensors, and one ISE sensor
• TROLL 9500 sub-2" low-flow sampling system