BEIYU TECHNOLOGIES CYQ-500/750 Portable Columnar Water Sampler

Overview

The BEIYU TECHNOLOGIES CYQ-500/750 Portable Columnar Water Sampler is an engineered field instrument designed for standardized, depth-resolved collection of surface water samples—specifically optimized for petroleum hydrocarbon analysis in compliance with Chinese environmental monitoring protocols. It operates on a gravity-assisted columnar sampling principle: upon submersion to a pre-set depth (up to 300 mm below the air–water interface), the device triggers automatic valve closure to isolate a discrete vertical water column segment. This ensures representative sampling of the upper water layer without turbulent mixing or cross-contamination from deeper strata—a critical requirement for accurate quantification of petroleum compounds via UV spectrophotometry (per HJ 970–2018). Unlike grab samplers or peristaltic pumps, the CYQ-500/750 maintains strict volumetric integrity and positional fidelity, eliminating operator-dependent depth estimation errors.

Key Features

• Depth-controlled columnar sampling: Integrated ultrasonic or pressure-based depth sensor automatically detects water level and initiates valve closure at precisely 300 mm submersion depth.
• Dual-volume configuration: Selectable sample volume of either 500 mL or 750 mL per cycle, calibrated to ±1% accuracy against NIST-traceable volumetric standards.
• Passive mechanical actuation: No external power required during sampling; closure mechanism relies on buoyancy-triggered mechanical linkage, ensuring reliability in remote or low-power field conditions.
• IP68-rated enclosure: Fully sealed housing protects internal microcontroller, lithium-ion battery, motorized valve drive, and signal conditioning circuitry against immersion, splash, and humidity exposure.
• Integrated visual–audible confirmation: LED status ring and 85 dB piezoelectric buzzer provide unambiguous feedback upon completion of depth positioning and sample isolation.
• Tool-free sample bottle exchange: Standardized 500 mL or 750 mL amber glass or HDPE bottles snap into place using bayonet-mount interface; no wrenches or adapters needed.

Sample Compatibility & Compliance

The CYQ-500/750 is validated for use with aqueous matrices containing low-to-moderate concentrations of dissolved and emulsified petroleum hydrocarbons (e.g., diesel, gasoline, crude oil residues). Its columnar geometry preserves stratified chemical gradients within the top 300 mm layer—essential for detecting surface slicks or anthropogenic plumes. The instrument meets procedural requirements of HJ 494–2009 (Technical Guidelines for Water Sampling) and aligns with the operational framework of the National Surface Water Environmental Quality Monitoring Network. While not certified to ISO 5667-10 or ASTM D3370, its design principles—depth-specific isolation, minimal turbulence induction, and contamination-free transfer—are consistent with internationally accepted best practices for volatile organic compound (VOC) and petroleum hydrocarbon sampling.

Software & Data Management

The CYQ-500/750 operates as a standalone field tool with embedded firmware only—no Bluetooth, Wi-Fi, or cloud connectivity. All operational parameters (target depth, selected volume, timestamp of closure event) are stored locally in non-volatile memory (EEPROM) and retrievable via USB-C interface using BEIYU’s proprietary desktop utility (Windows/macOS compatible). The software generates audit-ready CSV logs including GPS-tagged location metadata (when paired with optional external GNSS module), depth verification trace, and battery voltage history—supporting GLP-compliant record retention. Data export complies with 21 CFR Part 11 readiness: electronic signatures, user access controls, and immutable audit trails are configurable per laboratory SOP.

Applications

• Routine surveillance of surface water bodies for petroleum contamination near refineries, terminals, and transportation corridors.
• Compliance monitoring under China’s “Blue Sky and Clear Water Protection Campaign” for municipal and industrial discharge points.
• Pre-analytical sample acquisition prior to UV spectrophotometric determination of total petroleum hydrocarbons (TPH) per HJ 970–2018.
• Field validation of in-situ sensor data (e.g., fluorometers, hydrocarbon sensors) by providing reference physical samples.
• Emergency response sampling during accidental spills where rapid, reproducible, depth-specific collection is operationally constrained.

FAQ

What water quality parameters does the CYQ-500/750 directly measure?
It does not perform analytical measurements. It is a sampling device only—designed to collect physically representative columnar water volumes for subsequent laboratory analysis.
Can the sampling depth be adjusted beyond 300 mm?
No. The mechanical and sensor architecture is fixed for 300 mm maximum depth to maintain compliance with HJ 970–2018’s defined surface layer specification.
Is the sampler compatible with standard EPA-approved sample containers?
Yes—bottles must conform to 500 mL or 750 mL nominal volume and feature a 45 mm neck diameter (standard GL45 thread); amber glass is recommended for light-sensitive petroleum analysis.
How is calibration verified in the field?
A dedicated calibration kit includes depth-simulation jig and volumetric check cylinder; annual verification against certified reference standards is advised per ISO/IEC 17025-aligned QA/QC protocols.
Does the device require routine maintenance between sampling events?
Rinsing with deionized water after each use and biannual inspection of O-rings and valve seat integrity are sufficient; no lubrication or firmware updates are required under normal operating conditions.