UAC Series Online Multi-Parameter Water Quality Monitor

Overview

The UAC Series Online Multi-Parameter Water Quality Monitor is an engineered platform for continuous, real-time monitoring and control of critical water quality parameters in industrial and municipal water systems. Based on potentiometric, conductometric, and amperometric measurement principles—validated against ASTM D1129 (TDS), ASTM D1293 (pH), and ISO 7888 (conductivity)—the system delivers stable, field-deployable performance in dynamic hydraulic environments. It is not a portable or laboratory-grade analyzer but a hardened, rack-mountable process controller designed for 24/7 operation in cooling towers, wastewater treatment trains, drinking water distribution nodes, and recreational aquatic facilities. Its architecture integrates sensor signal conditioning, digital compensation algorithms (e.g., temperature-compensated FAC and ORP), and deterministic I/O scheduling to ensure measurement integrity under variable flow, pressure, and fouling conditions.

Key Features

• 7-inch high-brightness color touchscreen interface with intuitive icon-driven navigation—no programming expertise required for basic setup or alarm configuration
• Universal analog inputs (0–20 mA / 4–20 mA / 0–10 V) supporting simultaneous connection of up to eight industry-standard sensors (pH, ORP, FAC, CO₂, conductivity, temperature, etc.)
• Dual-pH capability with independent calibration and drift tracking for upstream/downstream process verification
• Onboard calibration management with timestamped logs, user ID tagging, and pass/fail validation per USP and EPA Method 300.0 guidelines
• Configurable relay outputs (up to 13) for direct integration with dosing pumps, solenoid valves, and SCADA-level PLCs
• Embedded timer functions enabling scheduled calibration, cleaning cycles, and data export intervals without external logic controllers
• Firmware-upgradable architecture ensuring long-term compatibility with evolving sensor technologies and regulatory reporting formats
• Web-based remote access via HTTPS-enabled embedded server—supports secure read-only monitoring and role-based configuration changes under TLS 1.2 encryption

Sample Compatibility & Compliance

The UAC Series is validated for use with aqueous samples across pH 2.0–12.0, conductivity 0.1 µS/cm–2 S/cm, and temperature ranges of 0–50 °C. It accommodates standard industrial electrodes (e.g., glass-body pH, platinum ORP, DPD-based FAC amperometric cells) and supports NIST-traceable calibration standards. While not certified as a Class I Div 2 device, its enclosure meets IP66 ingress protection for outdoor cabinet mounting. Data handling complies with foundational elements of FDA 21 CFR Part 11—user authentication, electronic signature support, and immutable audit trails for calibration events and parameter overrides—making it suitable for GLP-regulated utilities and contract laboratories performing routine compliance testing.

Software & Data Management

The onboard firmware includes a real-time trend viewer with scrollable 30-day history per parameter, configurable alarm thresholds (high/low, rate-of-change), and automatic CSV export via USB or Ethernet. All logged data includes UTC timestamps, sensor metadata (serial number, calibration date), and environmental context (ambient temperature, power status). The web interface provides live graphs, downloadable reports, and configurable email/SMS alerts triggered by deviation events. No proprietary desktop software is required; configuration and diagnostics are fully browser-based and compatible with Chrome, Firefox, and Edge on Windows/macOS/iOS/Android.

Applications

• Cooling Water Systems: Monitors corrosion drivers (ORP, pH, conductivity), scale potential (alkalinity, calcium hardness proxy via conductivity/TDS), and microbiological risk (residual FAC, CO₂-driven pH instability) to optimize inhibitor dosing and blowdown cycles.
• Wastewater Effluent Control: Provides multi-point feedback for tertiary disinfection (FAC/ORP setpoint control), neutralization (dual-pH cascade), and solids removal (conductivity-based TSS estimation), supporting compliance with NPDES permit limits.
• Drinking Water Distribution: Ensures residual disinfectant stability across storage and pumping nodes, with dual-pH and FAC correlation modeling to verify chlorine decay kinetics and prevent under-/over-dosing.
• Recreational Water Facilities: Maintains balanced chemistry (pH 7.2–7.8, FAC 1–3 ppm, CYA-adjusted ORP >650 mV) through automated feedback loops—critical for meeting CDC Model Aquatic Health Code (MAHC) requirements.

FAQ

Does the UAC Series support third-party sensor brands?
Yes—it accepts any analog-output sensor compliant with 4–20 mA, 0–20 mA, or 0–10 V output protocols, provided signal conditioning and range scaling are configured during setup.
Can historical data be exported in formats compatible with LIMS or ERP systems?
Yes—CSV exports include ISO 8601 timestamps, parameter units, and sensor identifiers; optional Modbus TCP integration enables real-time streaming into supervisory systems.
Is cloud-based data hosting available?
No—the system operates as an edge controller with local storage only; all data remains on-device unless manually exported or forwarded via user-configured network protocols.
What maintenance intervals are recommended for sensor calibration and cleaning?
Calibration frequency depends on application severity: daily for FAC in chlorinated wastewater, weekly for pH/ORP in cooling towers, and biweekly for conductivity/TDS in stable drinking water lines—guided by onboard drift alerts.
Is cybersecurity certification (e.g., IEC 62443) available for this model?
While not formally certified, the device implements defense-in-depth measures including disabled default credentials, encrypted web sessions, and firmware signature verification to align with NIST SP 800-82 baseline controls.