These versatile 3-in-1 pH/ATC (automatic temperature compensation) probes can be used in either the field or a plant.

• Low-maintenance, gel-filled electrode with built-in ATC
• Non refillable
• Epoxy body for ruggedness
• Ag/AgCl internal reference system, sealed reference

pH range: 0 to 14

Recommended for use with:
9107BN & 9107WP: for Orion A/A+ models 210, 230, 250, 410, 420, 520, 525, 710, 720, & 920
9107BNMD, 9107WMMD, 9107WLMD: for Orion STAR A111, STAR A121, STAR A211, STAR A221, STAR A321, Dual Star, & Versa Star