SC4500 Controller

SC4500 Controller

🧪 What This Data Means — For Quick Client Selection

  • SC4500 + LDO Optical System: Offers the lowest-maintenance DO measurement—no membranes, no electrolyte, minimal drift → ideal for 24×7 wastewater operations.

  • Dual Channel Option: Enables monitoring of two DO points with one controller → reduces cost for aeration basins.

  • High Accuracy (±0.1 mg/L): Suitable for blower modulation, nitrification control, and biological optimization.

  • Digital Communication (Modbus/Profibus): Seamless integration with SCADA, PLCs, and aeration control panels.

  • Predictive Diagnostics: Alerts before sensor fouling or calibration issues → ensures uninterrupted aeration monitoring.

  • IP65/NEMA4X Housing: Built for outdoor ETP/STP environments, chemical exposure, and high humidity.

  • Programmable Relays: Can directly control blowers/VFDs based on DO thresholds—energy savings up to 25–40%.

  • Auto Temperature & Salinity Compensation: Ensures accurate DO in aquaculture, biological tanks, and variable temperature processes.

  • Perfect Fit For: Municipal STPs, industrial ETPs, biological reactors, aquaculture, fermentation tanks, high-precision DO control systems.

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Description

The Hach SC4500 is an advanced multi-parameter controller used with Hach’s LDO optical DO sensors for precise dissolved oxygen monitoring. Designed for wastewater, industrial effluent, aeration systems, and process lines, it offers superior accuracy, fast response, digital sensor diagnostics, and seamless SCADA connectivity, making it ideal for automated aeration control and compliance monitoring.

🔧 Hach SC4500 — Key Technical Data & Selection Parameters

Parameter Specification / Details
Controller Type Multi-parameter digital controller (single/dual channel)
Compatible DO Sensors Hach LDO®, LDO II Optical Dissolved Oxygen Sensors
Measurement Principle Luminescent Optical DO (membrane-free)
DO Measuring Range 0–20 mg/L (0–200% saturation), sensor dependent
Accuracy ±0.1 mg/L or ±1% of reading
Response Time T90 < 60 seconds
Temperature Compensation Integrated, auto-corrected via sensor
Salinity Compensation Programmable for seawater/aquaculture use
Process Temperature 0–50 °C
Process Pressure Up to 6 bar (sensor dependent)
Outputs 4–20 mA, Modbus RTU/TCP, Profibus, HART (varies by module)
Digital Inputs Relay/alarm outputs for blower/pump control
Display High-brightness LCD, multi-parameter, multilingual UI
Diagnostics Predictive alerts, sensor health, calibration reminders
Enclosure IP65/NEMA4X field housing
Power Supply 100–240 VAC or 24 VDC
Data Logging Internal log + SCADA/BMS integration
Typical Applications Aeration tanks, ETP/STP, process DO, aquaculture, fermentation

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