VELP FOC225E & FOC225I Precision Incubators

Overview

The VELP FOC225E and FOC225I are precision-controlled, microprocessor-driven incubators engineered for stable, uniform thermal environments in microbiological, environmental, and water quality laboratories. Designed and manufactured in Italy, these units operate on a robust forced-air convection principle—ensuring homogeneous temperature distribution across the entire 196 L working chamber. Unlike passive static incubators, the FOC series employs an optimized air circulation system with adjustable airflow velocity and strategically positioned heating elements to minimize thermal gradients (< ±0.3 °C spatial uniformity at 37 °C, per ISO 15189 Annex A). The operational range of 3–50 °C supports diverse applications including BOD incubation (per ISO 5815-1), coliform enumeration (APHA 9221), algal growth studies, and stability testing of reagents used in water analysis protocols. Both models comply with IEC 61000-6-3 (EMC) and IEC 61010-1 (safety), and their construction meets IP20 ingress protection requirements for laboratory indoor use.

Key Features

• Microprocessor-based PID temperature controller with digital display, enabling precise setpoint adjustment in 0.1 °C increments and continuous monitoring of actual chamber temperature.
• Forced-air convection system with rear-mounted fan and perforated stainless-steel shelf supports ensures < ±0.5 °C accuracy and < ±0.3 °C uniformity across all load conditions (tested per ASTM E145-20 Annex A).
• Dual-model configuration: FOC225E features a high-efficiency insulated solid door; FOC225I integrates a double-glazed tempered glass door—enabling non-intrusive visual observation without compromising thermal stability or energy efficiency.
• Integrated RS-232/USB interface supports bidirectional communication with Windows-based VELP LabSoft™ software (v4.2+), enabling automated data acquisition, timestamped logging, and export-compliant CSV/TXT file generation.
• Programmable multi-step cycles: Up to 10 independent time–temperature profiles can be stored and executed sequentially—critical for simulating diurnal temperature shifts in ecotoxicity assays or staged incubation in membrane filtration procedures.
• Robust chamber construction: Interior chamber fabricated from electropolished AISI 304 stainless steel; exterior housing in powder-coated steel with reinforced corners for long-term mechanical integrity in shared lab environments.

Sample Compatibility & Compliance

The FOC225 series accommodates standard microbiological sample formats—including Petri dishes (up to 150 mm Ø), MPN test tubes (16 × 150 mm), BOD bottles (300 mL), and custom water quality sampling containers up to 35 cm height. Shelves are adjustable in 25 mm increments (4 positions) and support up to 15 kg loading per shelf. Units are validated for compliance with ISO/IEC 17025:2017 clause 6.4.10 (equipment suitability), and meet essential performance criteria outlined in USP for environmental monitoring equipment. Data integrity functions—including electronic audit trails, user-access levels (admin/operator), and password-protected parameter modification—support alignment with FDA 21 CFR Part 11 requirements when deployed under validated SOPs.

Software & Data Management

VELP LabSoft™ software provides full remote supervision and regulatory-grade data handling. It records temperature readings at user-defined intervals (1 s to 60 min), generates time-stamped trend curves with automatic annotation of alarm events (e.g., deviation > ±1.0 °C), and supports calibration certificate import (NIST-traceable reference sensors). Exported datasets include metadata such as operator ID, instrument serial number, and environmental ambient conditions (if external sensor is connected). All logs are digitally signed and tamper-evident, satisfying GLP documentation standards for water testing laboratories accredited to ISO/IEC 17025.

Applications

• Biochemical Oxygen Demand (BOD₅) determination per ISO 5815-1 and EPA Method 405.1.
• Total coliform and E. coli enumeration using membrane filtration (ISO 9308-1) or multiple-tube fermentation (ISO 9308-2).
• Cultivation of indicator organisms (e.g., Pseudomonas aeruginosa, Enterococcus faecalis) in drinking water and wastewater matrices.
• Algal growth rate assays (OECD 201) and Daphnia acute toxicity tests (OECD 202) requiring tightly controlled thermal regimes.
• Stability assessment of nutrient media, enzyme reagents, and QC standards used in spectrophotometric (e.g., APHA 3111B) and electrochemical (e.g., ISO 10523) water analysis methods.

FAQ

What is the difference between the FOC225E and FOC225I models?

The primary distinction lies in the door assembly: the FOC225E uses a solid insulated door for maximum thermal retention, while the FOC225I incorporates a double-glazed tempered glass door—allowing uninterrupted visual monitoring without opening the chamber.
Is the incubator suitable for BOD₅ testing according to ISO 5815-1?

Yes. Its temperature stability (±0.5 °C), uniformity (< ±0.3 °C), and 5-day continuous operation capability meet the instrumental requirements specified in Clause 6.2 of ISO 5815-1.
Can temperature data be exported for regulatory submission?

Yes. VELP LabSoft™ exports fully traceable, time-stamped datasets in CSV format with embedded metadata—compatible with LIMS integration and compliant with EU Annex 11 and FDA 21 CFR Part 11 when configured with user authentication and audit trail activation.
Does the unit support external sensor input for ambient condition logging?

Yes. An optional RS-485 port enables connection to external humidity/temperature probes, allowing synchronized logging of chamber and room conditions for environmental correlation studies.
What maintenance is required to ensure long-term calibration integrity?

Annual verification using a NIST-traceable Class A PT100 probe is recommended. VELP provides certified calibration kits (REF: CAL-FOC-KIT) and supports on-site IQ/OQ documentation packages for GxP environments.