Your search for "pH electrode" revealed the following:

Endress+Hauser OUSAF12 NIR VIS absorption sensor
Endress+Hauser OUSAF12 suspended solids sensor
Endress+Hauser CA76NA sodium analyzer
Endress+Hauser CA76NA online sodium analyzer front view
Endress+Hauser Density Calculator QML51 vibronic-based inline density measurement system
Endress+Hauser CA78 low-range TOC analyzer
Endress+Hauser CA78 online TOC analyzer front view
Endress+Hauser OUSAF44 UV absorption sensor
Endress+Hauser OUSAF44 optical process sensor
Endress+Hauser QWX43 Fermentation Monitor
ABB CoriolisMaster FCH400 hygienic Coriolis mass flowmeter
ABB FCH400 stainless steel hygienic flowmeter