Your search for "Endress+Hauser hygienic conductivity sensors" revealed the following:

Endress+Hauser CPS77E digital ISFET pH sensor
Endress+Hauser CPS77E Memosens ISFET pH sensor
Endress+Hauser COS51E amperometric oxygen sensor
Endress+Hauser COS51E Memosens digital oxygen sensor
Endress+Hauser CM82 Liquiline compact transmitter
Endress+Hauser CM82 Liquiline digital transmitter
Endress+Hauser OUSAF44 UV absorption sensor
Endress+Hauser OUSAF44 optical process sensor
Endress+Hauser Ceramax CPS341D digital pH sensor
Endress+Hauser CPS341D digital non-glass pH sensor front view
Endress+Hauser Memosens CCS58E ozone sensor
Endress+Hauser CCS58E Memosens digital ozone sensor
Endress+Hauser OUSAF12 NIR VIS absorption sensor
Endress+Hauser OUSAF12 suspended solids sensor
Endress+Hauser Prosonic FDU91 ultrasonic sensor for non-contact level and flow measurement
Endress+Hauser CPS42E digital ORP sensor
Endress+Hauser CPS42E Memosens digital ORP sensor
Endress+Hauser CPL51E digital pH sensor
Endress+Hauser CPL51E Memosens digital pH sensor
Endress+Hauser Prosonic FDU90 ultrasonic sensor for non-contact level and flow measurement
Endress+Hauser Ceraliquid CPS41 analog pH sensor
Endress+Hauser CPS41 analog pH sensor front view