pH/ORP Instrument — Salts/Brines
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LibertyCES has documented pH/ORP Instrument in Salts/Brines service, including Cyanide and Hexavalent Chromium. Wetted materials to confirm: Open-ring diaphragm. Documented models include ProMinent PHED/PHEX/RHEX. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
PHED explicitly named for electroplating media contaminated with Cr6+ and CN-.
Materials documented for this service
- Open-ring diaphragm (PHEX/RHEX)
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| ProMinent PHED application | Process water/electroplating contaminated with Cr6+, CN- | ProMinent — Measuring, Control and Sensor Technology |
| PHED max temperature/pressure | 80°C / 8 bar | ProMinent — Measuring, Control and Sensor Technology |
| PHED diaphragm | 2x ceramic, double junction | ProMinent — Measuring, Control and Sensor Technology |
| PHEX/RHEX max temperature/pressure | 25°C/16bar or 100°C/6bar | ProMinent — Measuring, Control and Sensor Technology |
| PHEX diaphragm design | Open ring diaphragm (high-solids, no chemical contamination service) | ProMinent — Measuring, Control and Sensor Technology |
Electroplating rinse water contaminated with cyanide or hexavalent chromium needs a double-junction sensor, not a standard single-junction pH probe — ProMinent's PHED is built specifically with a 2x ceramic double-junction diaphragm for this contaminated-media service, rated to 80°C/8 bar, distinct from the plain PHEP/PHES sensors quoted for clean drinking or process water.
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 Salts/Brines?
PHED explicitly named for electroplating media contaminated with Cr6+ and CN-.
What wetted materials should pH/ORP Instrument use in Salts/Brines service?
Materials documented for this service: Open-ring diaphragm (PHEX/RHEX). Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Salts/Brines chemicals does this cover?
Named chemicals in this documentation: Cyanide (CN-), Hexavalent Chromium (Cr6+).
Which pH/ORP Instrument models are documented for Salts/Brines?
Documented examples include ProMinent PHED/PHEX/RHEX.
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated