The Oakton Instruments 35634-68 Replacement Sensor extends the service life of the user's ORPTestr 30 Double Junction ORP Pocket Tester. Replacement operation is easy and entails screwing off the old sensor to then screw the new sensor on.

• Replacement sensor for ORPTestr 30 Double Junction ORP Pocket Testers
• Extends service life of instrument
• Easy replacement operation of unscrewing old sensor off and screwing new sensor on