Chemical Compatibility

Sanitary Conductivity / Resistivity Electrode — Food/Beverage/Biological Process Fluids

Strong evidence

Named chemicals

USP/WFI purified waterboiler condensateCIP solution strength verificationbeverage-grade process water

What LibertyCES's vendor documentation shows

The cell-constant logic is the publishable rule: the higher the cell constant, the more concentrated and aggressive the chemical the electrode is designed for. So a food plant uses a 0.01 or 0.1 cell sanitary electrode on WFI/purified water and a 20.0 cell (2823) on CIP caustic and acid strength verification — different electrodes for the two halves of the same plant. The >RA25 finish and Tri-Clamp connection are what make the sanitary variants product-contact-acceptable; the 130°C @ 5.2 bar rating covers steam-in-place.

Materials documented for this service

316SS or Titanium, >RA25 surface finish (sanitary variants)
EPDM O-rings
1-1.5in or 2in Tri-Clamp process connection
130°C @ 5.2 bar (sanitary rating)
PEEK insulator (2823)
Hastelloy-C, Monel and Titanium available on special order for the 2818-2823 family

Products cited for this service

GF Signet 2819 Sanitary (0.01 cell constant)GF Signet 2820 Sanitary (0.1)GF Signet 2821 Sanitary (1.0)GF Signet 2823 (20.0 cell, 200-400,000 µS — the only cell constant in the family explicitly rated for acids/bases, cleaners and other concentrated chemicals)GF Signet 2850 universal sensor electronics (EasyCal automatic test-solution recognition, extends sensor-to-instrument distance to 120m/400ft)

Sourced to

data/vendor-sources/gf-signet-instrumentation-catalog.md

Every material and product claim on this page traces to the vendor documentation listed above. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.

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