Your search for "ph electrode" revealed the following:

Endress+Hauser Prosonic FDU93 long-range ultrasonic sensor for non-contact level measurement
Endress+Hauser CAS51D digital nitrate SAC sensor
ABB PAF100 hygienic absolute pressure transmitter with stainless steel housing
ABB PAF100 hygienic pressure transmitter with optional backlit display
Fluke 725 Multifunction Process Calibrator for industrial process instrumentation
Fluke 725 process calibrator for mA, temperature and transmitter testing
Endress+Hauser CA76NA sodium analyzer
Endress+Hauser CA76NA online sodium analyzer front view
Fluke 922 Airflow Meter/Micromanometer for HVAC airflow measurement
Fluke 922 HVAC airflow meter for differential pressure and air velocity testing
Endress+Hauser OUSAF44 UV absorption sensor
Endress+Hauser OUSAF44 optical process sensor
Endress+Hauser OUSAF12 NIR VIS absorption sensor
Endress+Hauser OUSAF12 suspended solids sensor
Endress+Hauser Chemoclean CYR10B cleaning injector
Endress+Hauser CYR10B cleaning injector
Fluke 51 II Handheld Digital Thermometer with thermocouple probe
ABB 266DSH DP-Style differential pressure transmitter
ABB 266DSH differential pressure transmitter with local display
Fluke 709 precision mA loop calibrator for 4–20 mA measurement, sourcing, simulation and loop-powered testing
Fluke 709 mA loop calibrator for 4–20 mA source, simulation and loop testing
Endress+Hauser CA75 DPD analyzer module
Endress+Hauser CA75 chlorine analyzer module front view