Your search for "pH electrode" revealed the following:

Rosemount 68Q Sanitary Temperature Sensor
Rosemount 68Q Tri Clamp sanitary temperature sens
Endress+Hauser LPGmass D8EB LPG Coriolis flowmeter for refueling and distribution applications
Endress+Hauser Micropilot NMR81 radar level gauge
Endress+Hauser Micropilot NMR84 radar level gauge
Micropilot NMR84 radar level gauge for stilling wells
Fluke 771 milliamp process clamp meter for 4–20 mA signal measurement
Fluke 771 4–20 mA clamp meter for non-invasive process loop troubleshooting
Endress+Hauser Flowfit CPA240 flow assembly
Endress+Hauser CPA240 pH ORP flow assembly
Yokogawa AXG1A ADMAG TI Remote Transmitter for electromagnetic flow meter systems
Yokogawa AXG1A Remote Transmitter connected with ADMAG AXG magnetic flow meter