Memmert VO500 Vacuum Oven

Overview

The Memmert VO500 Vacuum Oven is a high-precision, laboratory-grade vacuum drying system engineered for reproducible thermal processing under controlled reduced-pressure environments. Designed and manufactured in Germany to stringent DIN and ISO quality standards, the VO500 employs direct-contact heating architecture—where independent Pt100-sensored heating elements are mounted directly onto the rear surface of each stainless-steel shelf (material 1.4404 / ASTM 316L)—to eliminate thermal lag and minimize heat loss. This multi-level control (MLC) configuration enables rapid, uniform temperature attainment across the entire chamber volume, reducing typical heating time to just 25% of conventional externally heated vacuum ovens. Operating within a temperature range of +20 °C to +200 °C and a programmable vacuum range from 5 mbar to 1100 mbar (with ultimate vacuum capability down to 0.01 mbar), the VO500 supports precise desorption, solvent removal, moisture analysis, and thermosensitive sample stabilization without oxidative degradation.

Key Features

• Direct-shelf heating system with integrated Pt100 Class A sensors (4-wire circuit) on each of up to four removable shelves—enabling real-time, shelf-specific temperature monitoring and closed-loop control
• Digital electromagnetic valve-based vacuum regulation with dual programmable gas inlets (air and inert gas), supporting fully automated pressure ramping and cycling
• Electropolished 1.4404 (ASTM 316L) interior chamber with deep-drawn, seamless construction; external cladding in textured stainless steel over galvanized steel backing
• Spring-loaded safety door with laminated ESG safety glass and annular silicone gasket seal—ensuring leak-tight integrity at all operating pressures
• Microprocessor-based controller with built-in diagnostics, ASF (Automatic Setpoint Linking), and dual-stage overtemperature protection (MLOP + mechanical TB)
• Real-time digital pressure display (5–1100 mbar), programmable vacuum/temperature cycles (up to 40 segments), and memory card (MEMoryCard XL) or PC-based programming via free Memmert software
• Compliance-ready architecture: supports GLP/GMP documentation workflows, including audit-trail-capable event logging and alarm history (audible + visual)

Sample Compatibility & Compliance

The VO500 accommodates diverse sample formats—including Petri dishes, weighing boats, crucibles, and custom fixtures—across its 101 L usable chamber volume (545 × 465 × 400 mm internal dimensions). Shelf spacing is fixed at 95 mm, with each shelf offering 525 × 380 mm active heating area and a maximum load capacity of 20 kg per shelf (60 kg total). Its inert-gas-compatible inlet ports and corrosion-resistant 1.4571 (ASTM 316Ti) vacuum tubing make it suitable for oxygen-sensitive applications such as catalyst activation, pharmaceutical lyophilization pre-drying, and polymer outgassing studies. The system meets essential regulatory benchmarks including DIN 12880 (temperature uniformity ≤ ±5 °C at 160 °C/50 mbar), DIN EN 61000-6-3 (EMC), and IEC 61010-1 (safety). Optional validation packages support IQ/OQ documentation aligned with FDA 21 CFR Part 11 and EU Annex 11 requirements.

Software & Data Management

Control and data acquisition are managed via Memmert’s proprietary Peltier-based microcontroller interface, featuring intuitive rotary encoder navigation and multilingual LCD display. All process parameters—including temperature setpoints, ramp rates, dwell times, vacuum profiles, and alarm thresholds—are programmable via front-panel input or offline using the free Memmert Software Suite (Windows-compatible). The system logs timestamped events—including sensor faults, door openings, vacuum breaches, and temperature deviations—with automatic storage on internal memory or external MEMoryCard XL. Exportable CSV files facilitate traceability in QA/QC workflows, while configurable alarm outputs (relay contacts) enable integration into centralized lab monitoring systems. Firmware updates maintain long-term compliance with evolving cybersecurity and data integrity expectations.

Applications

• Residual solvent removal in API synthesis and formulation development
• Moisture content determination per USP & ASTM D4294 protocols
• Thermal aging and stability testing of polymers, composites, and electronic components
• Pre-drying of samples prior to TGA, DSC, or XRD analysis
• Dehydration of biological tissues and botanical extracts under inert atmosphere
• Outgassing of ultra-high-vacuum components and optical substrates

FAQ

What is the maximum operating temperature and vacuum level?
The VO500 operates from +20 °C to +200 °C and achieves vacuum levels from 5 mbar to 1100 mbar, with an ultimate vacuum capability of 0.01 mbar.
Does the VO500 support inert gas purging?
Yes—two independently programmable gas inlets (air and optional inert gas) are fitted with 1.4571 stainless-steel valves and tubing, enabling controlled atmosphere processing.
How is temperature uniformity validated?
Per DIN 12880, temperature uniformity is ≤ ±5 °C across the shelf surface at 160 °C and 50 mbar; individual shelf control ensures spatial consistency without reliance on chamber air circulation.
Is the system compliant with FDA 21 CFR Part 11?
While the base unit does not include electronic signature functionality, its event logging, user access control options, and audit-trail export capabilities support Part 11 compliance when deployed with validated procedures and supplementary documentation tools.
Can multiple temperature/vacuum profiles be stored and recalled?
Up to 40 multi-segment programs can be saved internally; unlimited profiles are supported via PC-based software and MEMoryCard XL storage.