pH/ORP Instrument for Plating
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →Yes. LibertyCES has documented pH/ORP Instrument in Plating applications, including ProMinent PHED. The right model depends on the fluid, concentration, temperature, flow and duty cycle, so send James your process data for a free spec review before final selection.
Notes from the vendor documentation
PHED explicitly named for electroplating, chrome reduction, cyanide destruction.
Products cited in this application
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| ProMinent PHED envelope | pH 1–12, max 80°C / 8 bar | ProMinent — Measuring, Control and Sensor Technology |
| ProMinent PHED diaphragm | 2x ceramic, double junction | ProMinent — Measuring, Control and Sensor Technology |
| ProMinent PHED named application | Explicitly named for electroplating service contaminated with Cr6+ and CN- | ProMinent — Measuring, Control and Sensor Technology |
| Chrome reduction setpoints | pH control range 2.0-2.5 optimum; ORP setpoint -300mV (-400mV max) | GF Piping Systems — Application Solutions Made Easy: Chemical Process Industry |
| Cyanide destruction, batch (Stage 1) | pH raised to 11.5 using sodium hydroxide, chlorine added until ORP reaches +450mV | GF Piping Systems — Application Solutions Made Easy: Chemical Process Industry |
| Cyanide destruction, two-step | Stage 1 target oxidation below 0.1 ppm; Stage 2 pH lowered with sulfuric acid, up to 4-hour detention time | GF Piping Systems — Application Solutions Made Easy: Chemical Process Industry |
GF Signet's own process guidance carries an explicit safety warning: during batch cyanide destruction, acid injection must be manually locked out to prevent pH from dropping below pH 11 — dropping below that threshold risks forming toxic cyanogen chloride gas.
Chrome reduction and cyanide destruction are two of the few plating processes where a pH/ORP sensor error is a safety incident, not just an out-of-spec batch — ProMinent's PHED electrode is built with a double-junction ceramic diaphragm specifically for Cr6+/CN- contaminated process water, and the actual process setpoints are numbers a plating line's control loop has to hold, not approximate.
Every claim on this page traces to real, vendor-published documentation on file with LibertyCES. Confirm current specifications with the manufacturer before final specification.
FAQ
How is pH/ORP Instrument used in Plating?
PHED explicitly named for electroplating, chrome reduction, cyanide destruction.
Which pH/ORP Instrument models are specified for Plating?
Documented models include ProMinent PHED. Confirm current specifications with the manufacturer before final selection.
What does LibertyCES need to size pH/ORP Instrument for a Plating application?
The fluid and its concentration, operating temperature, flow or volume, pressure and suction conditions, duty cycle, and the existing equipment it replaces or connects to. James reviews it for free.
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