The PHE-09 Spear pH Electrode has durable food-grade stainless steel sheath, solid electrolyte, and long-life reference system, making the probe hard to contaminate and maintenance-free. Ideal for professional soft-solid food's pH measuring such as cheese, bread, fruit, sushi rice, meat, etc. The electrode uses a BNC connector, compatible with all labForce® pH meters. This is a replacement pH electrode for the labForce® F200 Portable pH Meter.