Yuntang YT-BOD Portable Biochemical Oxygen Demand (BOD) Analyzer
| Brand | Yuntang |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | YT-BOD |
| Instrument Type | Portable BOD Analyzer |
| Measurement Principle | Mercury-Free Pressure Differential Method |
| Measurement Range | 0–4000 mg/L |
| Detection Limit | 5 mg/L |
| Accuracy | ≤5% or ±1 mg/L (at 3.55 hPa) |
| Single-Sample Measurement Time | 8 min |
| Repeatability | 3% |
| Resolution | 0.01 mg/L |
| Data Logging Interval | 5 min – 24 h (user-configurable) |
| Incubation Temperature | 20 ± 1 °C |
| Incubation Duration | 1–30 days (programmable) |
| Sample Vessel Volume | 580 mL |
| Number of Parallel Channels | 6 independent terminals |
| Power Supply | AC 220 V ±10%, 50–60 Hz |
| Dimensions (w×d×h, incl. bottles) | 324 × 335 × 350 mm |
| Data Storage Capacity | ≥10 years of measurement records |
| Connectivity | Bluetooth (terminal-to-host), Wi-Fi (cloud upload), USB export |
| Built-in Thermal Printer | Yes |
| Operating System | Android-based UI |
| Display | 7-inch capacitive touchscreen |
| Battery Life (per terminal) | >2 years |
| Compliance Standards | HJ 505–2009, JJG 824–1993 |
Overview
The Yuntang YT-BOD Portable Biochemical Oxygen Demand (BOD) Analyzer is an engineered solution for rapid, accurate, and compliant determination of biochemical oxygen demand in aqueous samples—designed to meet the procedural requirements of HJ 505–2009 (China’s standard method for BOD5 determination using the 5-day incubation technique). Unlike traditional manometric or dilution-based approaches, this instrument employs a mercury-free pressure differential method: as microorganisms metabolize biodegradable organic matter under controlled aerobic conditions at 20 ± 1 °C, dissolved oxygen consumption induces a measurable pressure drop across a sealed, gas-tight reaction vessel. This physical change is transduced via high-stability piezoresistive sensors and converted into quantitative BOD concentration (mg/L) without chemical reagents, titration, or mercury-based manometers. The system eliminates operator intervention during incubation—fully automating data acquisition, time-series logging, curve generation, and endpoint calculation—making it suitable for unattended deployment in regulatory-compliant environmental monitoring workflows.
Key Features
- Mercury-free pressure differential sensing architecture—eliminates hazardous material handling and ensures long-term sensor stability and calibration integrity.
- Six independent, wirelessly connected measurement terminals—each equipped with integrated lithium battery (>2-year service life, >6-month runtime per full charge), enabling flexible batch expansion and mid-process addition of new samples without interrupting ongoing assays.
- Android-based embedded operating system with 7-inch capacitive touchscreen—supports intuitive navigation, on-device video-guided operation, real-time multi-curve overlay visualization, and parameter-driven protocol configuration.
- No tubing or fluidic interconnects—reducing maintenance overhead, eliminating risks of leakage, clogging, or permeation-related drift common in conventional respirometric systems.
- Programmable incubation duration (1–30 days) and configurable data logging intervals (5 minutes to 24 hours)—supporting both standard BOD5 and extended biodegradability assessments per ISO 10634 or OECD 301 series guidelines.
- Built-in thermal printer with customizable output—enabling immediate hardcopy documentation of test parameters, timestamps, and final results aligned with GLP documentation practices.
- Cloud-integrated data management via Wi-Fi—facilitating secure, audit-ready remote access, cross-laboratory comparison, and longitudinal trend analysis through role-based web portal authentication.
- Onboard clock and timestamped data storage—retaining ≥10 years of measurement history with traceable metadata (start time, temperature log, pressure drift compensation, user ID).
Sample Compatibility & Compliance
The YT-BOD analyzer accommodates standard 580 mL BOD bottles and accepts raw or pretreated water matrices—including domestic and industrial wastewater, surface water, effluent from biological treatment units, and leachate—without requiring pre-dilution for concentrations up to 4000 mg/L. Its pressure differential methodology inherently compensates for headspace gas composition variability, ensuring robust performance across heterogeneous sample types. The instrument conforms to HJ 505–2009 (Chinese EPA standard for BOD5) and JJG 824–1993 (verification regulation for BOD analyzers). While not certified to ISO 5815-1:2019 or ASTM D5211, its operational principles align with the fundamental respirometric basis of these international standards. Data integrity safeguards—including electronic signatures, immutable audit trails, and user-access logs—support alignment with basic GLP and internal QA/QC requirements; optional firmware upgrades may extend 21 CFR Part 11 compliance capabilities for regulated laboratories.
Software & Data Management
The YT-BOD’s Android platform hosts a purpose-built application that manages all assay lifecycle stages: protocol initialization, real-time pressure/temperature monitoring, automated BOD calculation using first-order kinetic modeling, and dynamic curve fitting. Raw sensor outputs are stored locally with millisecond-level timestamp resolution and synchronized via Bluetooth to the central host unit. Data export options include USB mass-storage mode (CSV/Excel-compatible), encrypted Wi-Fi transmission to Yuntang’s cloud platform, and direct thermal printout. Cloud access enables multi-user dashboards, statistical summaries (mean, SD, CV%), pass/fail flagging against preset thresholds, and exportable PDF reports compliant with internal documentation templates. All data transfers employ TLS 1.2 encryption; local storage utilizes write-protected NAND flash to prevent accidental overwrites.
Applications
This analyzer serves routine and research-grade applications across environmental testing ecosystems: continuous BOD monitoring in municipal wastewater treatment plant influent/effluent streams; rapid screening of industrial discharge compliance; validation of biological treatment efficiency; academic studies on microbial kinetics and biodegradation pathways; and field-deployable assessment in mobile labs or remote sampling campaigns. Its portability, battery resilience, and minimal infrastructure dependency make it particularly suited for third-party environmental inspection agencies operating under tight turnaround constraints or limited laboratory access.
FAQ
What regulatory standards does the YT-BOD comply with?
It is validated per HJ 505–2009 and JJG 824–1993. While not formally certified to ISO or ASTM BOD standards, its pressure differential methodology satisfies the core scientific principles outlined in ISO 5815-1 and ASTM D5211.
Can the instrument perform BOD measurements beyond 5 days?
Yes—incubation duration is fully programmable from 1 to 30 days, supporting extended biodegradability testing (e.g., ultimate BOD or toxicity screening protocols).
Is sample dilution required for high-concentration wastewater?
No—direct measurement is supported across the full 0–4000 mg/L range; dilution is only necessary for samples exceeding this upper limit.
How is data integrity ensured during power interruption?
Each terminal operates on autonomous battery power; the host retains all logged data in non-volatile memory, and synchronization resumes automatically upon power restoration.
Does the system support multi-user access control?
User accounts are managed via the Android OS framework; cloud portal access supports role-based permissions (view-only, edit, admin) and session logging for audit readiness.
