Rola-Chem Controllers & Parts

Maintain precise water balance in your pool, spa, or water feature with the Rola-Chem 550135 Replacement pH Sensor Probe. Built for reliability and accuracy, this factory-original electrode delivers consistent pH measurement when paired with Rola-Chem's digital controllers, including models like the 554000 and 555007.

The 550135 features a sealed, gel-filled reference system and rugged plastic housing for dependable use in chlorinated and chemically treated water. With a 8-foot cable and standard BNC connector, installation is simple in either a flow cell or inline application. Whether you're servicing a commercial pool or high-end residential spa, this sensor ensures your automated system keeps pH levels in check—improving sanitizer efficiency and swimmer comfort.

Ideal for regular sensor maintenance or replacement, this probe helps extend the life and performance of your water chemistry controller.

What’s Included

• Rola-Chem 550135 pH sensor probe (sealed, gel-filled)

• Pre-filled storage cap

• 8-foot attached cable with standard BNC connector

• 1-Year Manufacturer's Warranty