ZYKX SCI-025 Fixed-Position Proportional Water Sampler

Overview

The ZYKX SCI-025 Fixed-Position Proportional Water Sampler is an industrial-grade automated sampling system engineered for long-term, unattended operation in municipal wastewater treatment plants, industrial discharge monitoring stations, and regulatory compliance laboratories. It operates on the principle of programmable proportional sampling—acquiring representative composite samples based on real-time flow rate (via analog 4–20 mA input), time intervals, or liquid level thresholds—ensuring statistical validity of collected specimens per EPA Method 1664 and aligned with ISO 5667-10:2022 (Water quality — Sampling — Part 10: Guidance on sampling of wastewater). Designed to meet HJ/T 372–2007 (Technical Requirements and Test Methods for Automatic Water Samplers), the SCI-025 integrates robust fluid handling architecture with dual-mode control logic—supporting both fixed-interval and dynamic flow-proportional acquisition—to maintain sample integrity across variable hydraulic conditions.

Key Features

• Programmable multi-mode sampling: time-based, flow-proportional, level-triggered, event-driven (e.g., overflow or超标 alarm), and manual initiation
• Digital temperature-controlled refrigerated chamber (4 °C ±1 °C) with independent heating/cooling elements to preserve microbial and chemical stability during storage
• High-precision peristaltic pump driven by microstepping hybrid stepper motor—ensuring low-noise, repeatable aspiration with minimal pulsation and tubing wear
• Automatic tube pre-rinse and post-sampling purge cycles to eliminate cross-contamination between discrete sampling events
• Modular bottle carousel supporting up to 24 individual containers (≤1000 mL each), with auto-indexing and position-locking mechanism
• Dual RS232 and RS485 serial interfaces plus analog 4–20 mA input/output, dry contact I/O, and optional GSM/GPRS module for remote SMS-based command and status polling
• Two-tier password protection (operator/admin levels) and audit-trail logging of all parameter changes, power events, and fault conditions
• Onboard non-volatile memory storing ≥10,000 sampling records and ≥2,000 system event logs—including timestamps, volume dispensed, trigger source, and ambient temperature

Sample Compatibility & Compliance

The SCI-025 accommodates a broad range of aqueous matrices including raw sewage, treated effluent, stormwater runoff, and industrial process water—with viscosity tolerance up to 50 cP and suspended solids content ≤20,000 mg/L. Its suction lift capability of ≤8 meters enables deployment at elevated monitoring points or in deep manholes using standard PTFE-reinforced silicone tubing (0–50 m length). All wetted materials comply with USP Class VI biocompatibility standards; tubing and bottle seals are certified non-leaching per EPA SW-846 Method 8082A. The instrument satisfies data integrity requirements under GLP and supports 21 CFR Part 11–compliant electronic records when paired with validated software and digital signature modules.

Software & Data Management

Data acquisition and configuration are managed via an integrated 5.7-inch TFT LCD interface with intuitive Chinese/English bilingual navigation. Field-accessible USB port enables firmware updates and bulk export of CSV-formatted sampling logs and system diagnostics. Optional PC-based ZYKX SAMPLINK™ software provides graphical flow correlation analysis, automated report generation (PDF/Excel), and synchronization with SCADA platforms via Modbus RTU/TCP. All stored records include UTC timestamps, GPS-tagged location metadata (when equipped with optional GNSS module), and cryptographic hash verification to ensure evidentiary admissibility in regulatory submissions.

Applications

• Continuous compliance monitoring at NPDES-permitted discharge points
• Composite sampling for BOD, COD, TSS, nutrient, and heavy metal analysis per Standard Methods 5210–5310
• Event-triggered sampling during CSO (Combined Sewer Overflow) or illicit discharge incidents
• Calibration validation of online analyzers (e.g., UV-Vis spectrophotometers, ion-selective electrodes)
• Long-term trend analysis in watershed management programs requiring ISO 5667-3–compliant sampling strategies
• Integration into smart city environmental IoT networks via MQTT or HTTP RESTful API endpoints

FAQ

What sampling protocols does the SCI-025 support?

It supports time-proportional, flow-proportional (using external flowmeter analog signal), level-proportional, event-triggered (e.g., high-level alarm), and manual-initiated sampling—all programmable and combinable within a single schedule.
Is the unit suitable for outdoor installation in extreme climates?

Yes—the enclosure meets IP55 ingress protection rating, and operational range extends from −20 °C to +60 °C. Optional solar-powered battery backup and heated sample chamber variants are available for sub-zero deployments.
How is sampling accuracy verified and maintained?

Each unit undergoes factory calibration against gravimetric standards traceable to NIM (National Institute of Metrology, China); field recalibration is supported via built-in volumetric verification mode using certified reference weights and stopwatch timing.
Can the SCI-025 integrate with third-party SCADA or LIMS systems?

Yes—via RS485/Modbus RTU, TCP/IP socket, or OPC UA (with gateway add-on); full register mapping documentation and driver libraries are provided for Siemens, Rockwell, and Wonderware platforms.
What maintenance intervals are recommended?

Peristaltic tubing replacement every 3 months under continuous operation; quarterly inspection of valve seals, sensor calibration verification, and annual firmware update—documented in the included GLP-compliant maintenance logbook.