LINK AUTOMATION, ORP PROBE WITH CONX CONNECTOR CABLE, GOLD TIPPED

The Link Automation ORP Probe with CONX Connector Cable, Gold Tipped (Pool Link / Link Automation) is a specialized commercial-grade oxidation-reduction potential electrode engineered specifically for commercial aquatic facilities utilizing salt chlorine generation (electrolytic chlorinators) or ozone systems in high-humidity, corrosive chemical room environments. Combining a solid gold sensing tip with an industrial CONX circular connector, this configuration eliminates hydrogen gas interference on the sensing face while providing an IP67/NEMA 6P sealed, water-tight physical lock at the controller enclosure bulkhead to prevent pin corrosion and signal loss.

Hardware & Analytical Architecture

Engineered to maintain precision millivolt ($mV$) potential measurements across aggressive commercial turnover cycles:

• High-Purity Solid Gold (Au) Tip: Designed specifically for electrolytic saltwater applications. Electrolytic cells generate microscopic hydrogen bubbles at the cathode that adsorb onto traditional platinum bands, depressing millivolt readings (hydrogen overpotential). Gold features a significantly higher hydrogen overpotential, resisting gas blinding and providing stable, accurate ORP tracking in saltwater pools.

• Industrial CONX Water-Tight Termination: Replaces standard exposed BNC plugs with a molded circular multi-pin connector featuring internal elastomeric O-rings and a threaded or bayonet locking collar. This design creates a hermetic seal against airborne acid vapors, chloramine gas, and washdown spray, eliminating high-resistance contact faults and ground loops.

• Sealed $Ag/AgCl$ Reference System: Outfitted with an internal silver/silver chloride reference electrode suspended in a high-viscosity, saturated potassium chloride ($KCl$) gel matrix that requires no ongoing pressurization or electrolyte replenishment.

• Porous Liquid Junction: Features a broad-surface porous Teflon or ceramic annular junction designed to resist fouling from suspended bather organics, oils, and calcium carbonate scale while maintaining steady electrolytic continuity with the sample stream.

• Shielded Low-Noise Coaxial Cable: Wrapped in heavy-gauge, double-shielded jacketing engineered to suppress electromagnetic interference (EMI) and radio-frequency noise emitted by adjacent variable frequency drives (VFDs), electronic salt chlorinator power supplies, and high-voltage pump motors.

• Protective Storage Boot: Ships pre-hydrated with a liquid-tight storage cap filled with 3.8 M or 4.0 M potassium chloride ($KCl$) storage buffer to protect the reference junction during storage and transit.

Technical Specifications

• Measurement Range: 0 to 1,000 mV (nominal operational window: -1,000 to +1,000 mV).

• Reference System: Sealed $Ag/AgCl$ with gelled electrolyte.

• Application Suitability: Commercial saltwater chlorination systems, ozone contact systems, and standard liquid hypochlorite applications.

• Response Dynamic: Achieves $90\%$ of stabilized millivolt equilibrium within 3 to 10 seconds in active bypass flow.

• Connector Type: Molded CONX circular quick-disconnect connector with threaded/bayonet locking collar.

• Cable Length: Standard 10-foot (approx. 3.0 m) lead (optional 20-foot or 30-foot extended factory leads available for remote panel routing).

• Operating Temperature Limits: 32°F to 140°F (0°C to 60°C).

• Maximum Working Pressure: 50 PSI (approx. 3.45 bar) in commercial flow cell manifolds.

• Process Connection Fitting: 1/2" NPT or 3/4" NPT external body threads / compression gland mount (fits Pool Link 500 Series, Legacy chambers, and Hayward CAT acrylic flow cells).

Calibration, Cleaning & Maintenance

• Hydration Protocol: The gold tip and porous junction must remain wet at all times. When taking the sampling loop off-line for winterization or plumbing repairs, reinstall the wetting boot filled with 4.0 M KCl solution (or clean pool water in an emergency). Never store the probe in distilled or deionized water, as zero-ion water rapidly leaches reference ions out through the porous junction.

• Gold Tip Cleaning: Avoid abrasive scouring pads or sandpaper on gold tips. Remove organic bio-films or bather oils by gently wiping the gold surface with a soft cotton swab saturated with isopropyl alcohol or mild liquid detergent. For mineral scale, soak the tip in a 5% to 10% hydrochloric acid solution or household white vinegar for 5 to 10 minutes, followed by a thorough tap water rinse.

• Calibration & Verification: Verified using standard quinhydrone redox reference buffers ($pH\ 4.00$ buffer saturated with quinhydrone yields approximately $+263\text{ mV}$ at 25°C; $pH\ 7.00$ buffer with quinhydrone yields approximately $+86\text{ mV}$).