| Applies when | hydrofluoric acid, fluoride, hf etching, high solids no chemical contamination, ph sensor selection |
|---|---|
| Avoid | standard ceramic/PTFE pH sensor for fluoride or HF service (Instrumentation) |
| Recommend instead | ProMinent Fluid Controls DULCOTEST pH Sensor () |
| Rationale | ProMinent's own pH sensor selection guide ties specific diaphragm/glass constructions to specific chemistries: PHEF/PHEF-DJ use glass with increased resistance to hydrofluoric acid specifically because standard pH glass is attacked by HF/fluoride-containing media; PHEX's open ring diaphragm is for high-solids-content applications with no chemical contamination (not for chemically aggressive service). Choosing a standard ceramic-diaphragm sensor for HF/fluoride or high-solids service would risk premature sensor failure. |
| Confidence | confirmed |
| Source | vendor-sources/prominent-sensors-controllers.md |
This is a general engineering rule derived from real field/case-study evidence, not a substitute for a project-specific specification review — confirm against your exact process conditions before ordering equipment.
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Source: Liberty Chemical Equipment & Supply, Inc. (LibertyCES) — engineering data compiled from real vendor and field-verified sources. For a free spec review, call James Riggins at (559) 395-5500 or email [email protected] / [email protected]. Website: libertyces.com.