Pool Link 501 Series - ORP/pH/Temp/Turbidity, No Flow Cell

The Pool Link 501 Series - ORP/pH/Temp/Turbidity, No Flow Cell is an advanced, multi-parameter automated commercial water chemistry and water clarity controller. Designed for municipal natatoriums, high-load waterparks, competition facilities, and resort aquatic venues, this configuration adds optical turbidity measurement to standard pH, ORP, and temperature monitoring. Delivered without a pre-plumbed flow cell manifold, it provides the core electronics, analytical probes, and optical clarity sensor for seamless integration into existing multi-port flow manifolds or custom equipment bypass setups.

System Overview & Package Components

Engineered for facilities requiring automated compliance with water clarity/turbidity standards alongside chemical balance:

• Pool Link 501 Multi-Channel Digital Controller: Microprocessor-driven control console featuring a multi-line backlit digital LCD interface displaying simultaneous real-time readings for pH, ORP (mV), temperature (°F/°C), and water clarity (NTU), along with active relay feed states and alarm diagnostics.

• Commercial Combination pH Electrode: Heavy-duty, sealed glass-body combination probe with an internal reference chamber, porous junction, shielded coaxial cabling, and water-resistant BNC connection.

• Commercial Platinum-Band ORP Sensor: Rapid-response platinum electrode engineered for continuous millivolt monitoring across chlorinated or brominated commercial systems.

• Precision Electronic Temperature Sensor: Solid-state temperature probe delivering continuous water temperature data for operational tracking and automated temperature compensation.

• Optical Turbidity Sensor Probe: Nephelometric optical turbidity probe designed to continuously measure suspended solids, cloudiness, and particulate matter via scattered light measurement (reporting in NTU), enabling automated tracking of filtration efficiency and water clarity compliance.

• Installation & Gland Hardware: Includes compression cable glands and threaded NPT adapters for securing sensors into compatible custom piping tees or existing multi-probe flow cells.

Technical Specifications

• Monitoring & Control Ranges:

  • pH Range: 0.00 to 14.00 pH (operational control range typically 7.00 to 8.00; resolution: 0.01 pH)

  • ORP Range: 0 to 1,000 mV (resolution: 1 mV)

  • Temperature Range: 32°F to 120°F (0°C to 49°C)

  • Turbidity Range: 0.0 to 10.0 NTU (Nephelometric Turbidity Units; resolution: 0.01 to 0.1 NTU)

• Control Modes: Continuous (On/Off), Proportional (pulse-frequency/time-proportional modulation to prevent chemical overshooting), and Manual override feed modes.

• Relay Outputs:

  • Dedicated chemical dosing relays for pH (acid/CO₂ or base) and ORP (chlorine/bromine feed equipment), rated up to 5A at 115V/230V AC.

  • Auxiliary programmable relay (can be tied to high-turbidity alarms, automated backwash triggers, or secondary sanitizer equipment).

  • System fault/alarm dry-contact relay for remote building automation systems (BAS) or telemetry connection.

• Safety & Interlock Features:

  • Programmable independent feed timeout clocks per chemical channel (prevents runaway chemical feeding in the event of line disruption).

  • High/Low parameter threshold alarms (visual screen indicators and audible warning buzzer).

  • High-turbidity warning indicator alerting operators to filtration breakthrough or bather surge load.

  • Dedicated digital dry-contact input terminals for safety flow switch or main pump interlock.

• Enclosure: NEMA 4X / IP66 weather-resistant, UV-stabilized, corrosion-proof thermoplastic housing with a clear, lockable hinged access door.

• Electrical Requirements: Universal 115V / 230V AC, 50/60 Hz, single phase.

Operational Footprint & Sensor Installation

• Enclosure Dimensions: Approximately 11.0" H × 9.0" W × 5.5" D (approx. 27.9 cm × 22.9 cm × 14.0 cm).

• Sensor Lead Lengths: Standard 10-foot (approx. 3.0 m) shielded low-noise cables with protective connector boots.

• Bypass System Requirements: Requires an existing multi-probe acrylic flow cell or manifold equipped with compatible 1/2" or 3/4" NPT ports rated up to 50 PSI (approx. 3.45 bar).

• Operating Ambient Conditions: 32°F to 122°F (0°C to 50°C), up to 95% non-condensing relative humidity.