pH/ORP Instrument — Acids
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →Named chemicals
LibertyCES has documented pH/ORP Instrument in Acids service, including Hydrofluoric Acid and Sulfuric Acid. Wetted materials to confirm: PP body and PTFE Teflon NEXUS. Documented models include Icon P14H/P14F pH sensors and GF Signet PHEF/PHEF-DJ. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Icon's P14 family has a quantified 4000ppm HF concentration breakpoint driving sensor selection; GF Signet PHEF explicitly for low-pH fluoride-containing media.
Materials documented for this service
- PP body (P14H/P14F)
- PTFE Teflon NEXUS
- dedicated HF-resistant glass electrode
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Icon P14H/P14F HF concentration threshold | P14H for HF <4000ppm, P14F for HF >4000ppm | Icon Process Controls — Analytical Instruments + Analytical Displays |
| P14 Series pH accuracy | ±0.05 pH | Icon Process Controls — Analytical Instruments + Analytical Displays |
| P14 Series pressure/temperature rating | 43.5 psi max, 32-140°F | Icon Process Controls — Analytical Instruments + Analytical Displays |
| P14 Series reference junction | PTFE Teflon® NEXUS® liquid junction, double salt bridge | Icon Process Controls — Analytical Instruments + Analytical Displays |
| Chrome reduction acid-dosing pH control range | pH 2.0-2.5 (optimum) | GF Piping Systems — Application Solutions Made Easy: Chemical Process Industry |
| Chrome reduction minimum detention time | 15 minutes | GF Piping Systems — Application Solutions Made Easy: Chemical Process Industry |
On chrome-reduction acid dosing, GF Signet's own guidance warns that lowering pH further than needed to hit the 2.0-2.5 optimum risks releasing hazardous sulfur dioxide gas — the pH/ORP loop should be tuned to the setpoint, not driven low 'to be safe.'
Hydrofluoric acid doesn't just etch glass at high concentration — Icon's own P14 line splits pH sensor selection at a hard 4000 ppm threshold, meaning the same generic-looking pH probe body can be the wrong part number below or above roughly 0.4% HF. On acid-dosing control loops like chrome reduction, the electrode chemistry and the control setpoint are the same specification decision, not two separate ones.
Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.
FAQ
Can pH/ORP Instrument handle Acids?
Icon's P14 family has a quantified 4000ppm HF concentration breakpoint driving sensor selection; GF Signet PHEF explicitly for low-pH fluoride-containing media.
What wetted materials should pH/ORP Instrument use in Acids service?
Materials documented for this service: PP body (P14H/P14F), PTFE Teflon NEXUS, dedicated HF-resistant glass electrode. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Acids chemicals does this cover?
Named chemicals in this documentation: Hydrofluoric Acid (>4000ppm split), Sulfuric Acid.
Which pH/ORP Instrument models are documented for Acids?
Documented examples include Icon P14H/P14F pH sensors, GF Signet PHEF/PHEF-DJ.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].
Send James your spec
Fluid, concentration, temperature, flow or volume, and where it goes. James replies with a real answer, not a catalog page.
Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated