HACH SG Series Online Water Quality Remote Quality Control System
| Brand | HACH |
|---|---|
| Origin | Imported |
| Manufacturer Type | Manufacturer |
| Model | SG |
| Pricing | Upon Request |
Overview
The HACH SG Series Online Water Quality Remote Quality Control System is an engineered solution designed to support regulatory compliance and data integrity in continuous water quality monitoring environments. It operates on a precision volumetric dilution principle—leveraging a programmable human-machine interface (HMI) controller coupled with industrial-grade I/O modules to coordinate sample cell filling, high-accuracy peristaltic dosing pumps, and automated fluid handling sequences. The system prepares certified reference solutions—including zero, span, blank, and dynamic spike standards—by metering traceable stock solutions into purified water within a temperature-stabilized sample cell. Prior to each calibration or recovery cycle, the unit executes a full rinse-and-drain protocol using deionized water to eliminate carryover and memory effects, ensuring metrological traceability and measurement reproducibility across extended operational cycles.
Key Features
- Precision Automated Sample Preparation: Configures calibration standards at user-defined concentrations with dilution repeatability ≤ 0.3% RSD (Relative Standard Deviation), validated per ISO/IEC 17025-aligned internal protocols.
- Real-Time Dynamic Spiking: Interfaces with upstream analyzers (e.g., HACH SC1000, HQd, or third-party SCADA systems) via Modbus RTU/TCP to retrieve real-time concentration values and calculate optimal spike levels for recovery testing—enabling adaptive QA/QC workflows.
- Self-Maintaining Fluid Pathway Architecture: Integrates automatic line flushing, air purging, and gravity-assisted drainage to prevent biofilm formation and cross-contamination between test cycles; no manual disassembly required for routine maintenance.
- Compact Modular Design: Features integrated micro-dilution manifolds and low-volume flow paths (< 5 mL total internal volume), minimizing reagent consumption and reducing footprint to fit within standard 19-inch rack enclosures or wall-mounted environmental cabinets.
- Intuitive Local Operation: Equipped with a 7-inch TFT resistive touchscreen display supporting multilingual UI (English, Spanish, French), password-protected configuration menus, and real-time status visualization of pump actuation, valve sequencing, and cell fill level.
Sample Compatibility & Compliance
The SG Series supports aqueous matrices compliant with EPA Method 1664, ISO 5667-3, and ASTM D511/D512 for common parameters including COD, NH₃-N, NO₃⁻-N, PO₄³⁻, TOC, and turbidity. All wetted components—including fluoropolymer tubing, PTFE diaphragm pumps, and borosilicate glass sample cells—meet USP Class VI biocompatibility and NSF/ANSI 61 certification requirements for drinking water applications. The system architecture facilitates audit-ready documentation: event logs record timestamped start/stop commands, dilution factors, spike volumes, and error codes, aligning with GLP and GMP data integrity expectations under FDA 21 CFR Part 11 when deployed with HACH’s DataTrak™ software suite.
Software & Data Management
Local HMI firmware stores up to 12 months of operational history (including calibration events, spike recoveries, and maintenance alerts) with cyclic overwrite protection. For enterprise integration, the SG Series provides native Modbus TCP/IP and optional OPC UA connectivity to SCADA, LIMS, or cloud-based platforms such as HACH WQX Cloud or Siemens Desigo CC. All data exports comply with IEEE 1451.2 transducer electronic datasheet (TEDS) conventions and support CSV/Excel formatting for third-party statistical process control (SPC) analysis. Audit trails include immutable timestamps, operator IDs, and cryptographic hash verification for regulatory submission readiness.
Applications
- Regulatory-compliant QA/QC for wastewater discharge monitoring at municipal treatment plants (per EPA NPDES permit requirements)
- Long-term drift verification of online UV-Vis spectrophotometers, ion-selective electrodes, and amperometric sensors in riverine and estuarine networks
- Automated validation of multi-parameter sondes deployed in drinking water distribution reservoirs
- Support for ISO 14001-certified environmental management systems requiring documented instrument performance verification
- Field-deployable QC backbone for mobile labs conducting ambient surface water surveys under EU Water Framework Directive (WFD) reporting frameworks
FAQ
What standards does the SG Series comply with for calibration verification?
It supports implementation of EPA Methods 1664, 365.4, and ISO 5667-3 for standard addition and recovery testing, with hardware design aligned to ISO/IEC 17025 clause 7.7 on reference material handling.
Can the SG Series interface with non-HACH analyzers?
Yes—via open Modbus RTU/TCP protocol; configuration templates are available for common OEM platforms including YSI, Endress+Hauser, and Xylem Analytics instruments.
Is remote firmware update supported?
Firmware updates require local USB drive upload through the HMI interface; over-the-air (OTA) updates are not implemented due to cybersecurity requirements for critical infrastructure deployments.
What is the minimum detectable spike concentration increment?
Based on pump resolution and stock solution stability, typical minimum incremental spiking is 5% of full-scale analyzer range, configurable down to 1% with high-purity stock standards and extended dwell time.
Does the system meet hazardous location certifications?
The base SG unit is rated IP65 for outdoor enclosure use but lacks ATEX/IECEx certification; explosion-proof variants require custom engineering consultation through HACH Global Solutions Group.
