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.