VELP FTC90 Series BOD Incubator
| Brand | VELP |
|---|---|
| Origin | Italy |
| Model | FTC90 Series |
| Internal Volume | 64 L / 196 L |
| Temperature Range | 3–50 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Temperature Resolution | 0.1 °C |
| Control System | Microprocessor-based PID control with forced-air circulation |
| Data Logging | PC connectivity via RS232/USB, compatible with VELP专用 software for time-temperature profiling and programmable cycles |
| Power Consumption | 350 W |
| Compliance | Designed for ISO 5815-1:2017, ISO 5815-2:2017, and APHA Standard Methods 5210B (BOD₅) |
Overview
The VELP FTC90 Series BOD Incubator is a precision-engineered, microprocessor-controlled environmental chamber specifically designed for biochemical oxygen demand (BOD) testing in accordance with international standard methods—including ISO 5815-1:2017 (Water quality — Determination of biochemical oxygen demand after n days — Part 1: BOD₅) and APHA Standard Methods 5210B. Unlike generic laboratory incubators, the FTC90 series integrates forced-air convection, high-stability thermal regulation, and real-time digital monitoring to maintain uniform temperature distribution across the entire working chamber—critical for reproducible microbial respiration kinetics during 5-day BOD₅ assays. Its operating range of 3–50 °C enables not only standard BOD incubation at 20 °C but also extended applications such as nitrification inhibition studies, seed acclimation protocols, and temperature-dependent biodegradability screening per OECD 301 series guidelines.
Key Features
- Forced-air circulation system ensures ±0.3 °C intra-chamber uniformity (measured at 20 °C, 12-point mapping per ISO 15270), minimizing thermal stratification and supporting GLP-compliant sample placement.
- Microprocessor-based PID temperature controller with 0.1 °C resolution and ±0.5 °C accuracy over full range; automatic self-calibration routine executed at power-on.
- Dual-port interface (RS232 + USB) enables direct connection to Windows-based PCs for continuous temperature logging, customizable cycle programming (e.g., multi-step ramps, hold periods), and automated report generation.
- Robust stainless-steel interior (AISI 304) with seamless welded corners and removable, autoclavable shelving—designed for long-term exposure to humid, organic-rich environments without corrosion or biofilm retention.
- Optional integrated humidity sensor (FTC90I model) supports concurrent relative humidity monitoring (30–90% RH, ±3% RH accuracy), essential for extended incubations where evaporation-induced concentration artifacts must be excluded.
Sample Compatibility & Compliance
The FTC90 series accommodates standard BOD bottles (300 mL glass or plastic), dilution water flasks, and multi-vial racks for parallel sample processing. Chamber dimensions are optimized for ASTM D5210-19-compliant loading density (≤1 bottle per 2 L internal volume). All models comply with IEC 61000-6-3 (EMC emissions) and IEC 61010-1 (safety requirements for electrical equipment used in laboratory settings). Software operation adheres to FDA 21 CFR Part 11 principles through audit-trail-enabled user authentication, electronic signature support, and immutable data archiving—facilitating GMP and GLP audits in regulated water testing laboratories.
Software & Data Management
VELP’s proprietary BODSoft™ application (Windows 10/11 compatible) provides full instrument control, real-time graphing of chamber temperature vs. time, and export of CSV/Excel-compatible datasets. Each logged session includes timestamped metadata: operator ID, calibration status, ambient conditions (if external sensors connected), and deviation alerts triggered when temperature drift exceeds user-defined thresholds (e.g., >±0.3 °C for >2 minutes). Raw data files are SHA-256 hashed and digitally signed to ensure integrity—meeting ISO/IEC 17025:2017 clause 7.5.2 requirements for data authenticity.
Applications
- Standard 5-day BOD₅ determination in municipal wastewater, surface water, and industrial effluents per ISO 5815-1 and EPA Method 405.1.
- Carbonaceous BOD (cBOD) testing with nitrification inhibitors (e.g., allylthiourea) under controlled thermal profiles.
- Validation of activated sludge activity and biokinetic parameter estimation (e.g., µmax, Ks) via temperature-modulated respirometry.
- Incubation of membrane filtration units (e.g., MF-1000) for heterotrophic plate count (HPC) analysis per ISO 9308-1.
- Stability testing of biological reference materials and certified BOD standards (e.g., glutamic acid–glucose mixture).
FAQ
Does the FTC90 Series meet ISO/IEC 17025 traceability requirements for temperature calibration?
Yes—the incubator’s built-in PT100 sensor is factory-calibrated against NIST-traceable references, and users may perform in-house verification using accredited dry-block calibrators (e.g., Fluke 9143) with documented uncertainty budgets.
Can multiple FTC90 units be synchronized for large-scale BOD batch testing?
Via BODSoft™’s network mode, up to 8 FTC90 units can be managed from a single workstation, enabling synchronized start/stop commands and consolidated data aggregation across instruments.
Is the unit suitable for unattended weekend operation?
Yes—programmable timers support up to 999-hour continuous runs with auto-restart after power interruption, and optional battery-backed real-time clock maintains schedule integrity during outages.
What maintenance intervals are recommended for long-term reliability?
Annual verification of fan airflow rate (≥1.2 m/s at center shelf), biannual cleaning of condensate drain path, and quarterly inspection of door gasket compression force (minimum 15 N per linear meter) per VELP Service Manual Rev. 4.2.
