The HI73127 spare pH sensor makes electrode replacement quick and easy. The spare pH sensor is designed as an easy-fit cartridge that locks into place, featuring two o-rings to maintain a watertight seal. With no pins to line up or that can break, this sensor is ideal for quick replacements.

• Easy-to-replace.
• Extend the life of your Hanna pH tester with a spare pH sensor.
• Keep your pH measurements simple & accurate.

Replacing a pH sensor on one of Hanna's compatible testers is both quick and easy. The spare pH sensor is designed as an easy-fit cartridge that locks into place, featuring two o-rings to maintain a watertight seal. Replacement takes a few seconds and does not have any delicate pins that could break.

Use the HI73128 replacement electrode tool that is included with the pH tester to expertly replace the sensor.