Memmert UNB400 Natural Convection Drying Oven
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | UNB400 |
| Pricing | Upon Request |
Overview
The Memmert UNB400 Natural Convection Drying Oven is a precision-engineered laboratory drying and heating system designed for reproducible thermal treatment of samples under controlled, non-forced airflow conditions. Operating on the principle of natural convection—where heat transfer occurs solely via buoyancy-driven air movement without mechanical fan assistance—the UNB400 ensures minimal sample disturbance, uniform thermal distribution, and exceptional stability for applications requiring gentle, contamination-free drying or aging. Built to DIN 12880 standards for laboratory ovens, it delivers traceable temperature performance with documented calibration integrity, making it suitable for GLP-compliant workflows in pharmaceutical, materials science, and quality control laboratories.
Key Features
- Stainless steel chamber and exterior (1.4301 / ASTM 304), fully recyclable and resistant to corrosion, abrasion, and cleaning agents
- Natural convection design eliminates fan-induced turbulence, particle resuspension, and vibration—ideal for delicate powders, filter papers, or moisture-sensitive specimens
- Temperature range: ambient +5 °C (minimum operating temperature 30 °C) to 220 °C; extended option up to 300 °C available upon specification
- Electronic PID temperature controller with self-diagnostic capability, integrated fuzzy logic for adaptive response to load and ambient fluctuations
- Class A Pt100 four-wire resistance thermometer (IEC 60751) with ±0.1 °C accuracy at 0–100 °C; dual-sensor redundancy option for uninterrupted operation and fault-tolerant monitoring
- Triple-layer safety architecture: mechanical temperature limiter (TB Class 1), electronic overtemperature cutoff (±10 °C above setpoint for standard configuration), and microprocessor-based thermal watchdog with automatic fault logging
- Intuitive 8-digit alphanumeric display with multilingual UI (English, German, French, Italian, Spanish); real-time visualization of setpoint, actual temperature, elapsed/remaining time, and alarm status
- Programmable timer with up to 99 h 59 min duration; optional multi-segment ramp-soak profiles via included Celsius 2007 software (Windows-compatible)
Sample Compatibility & Compliance
The UNB400 accommodates a broad spectrum of sample types—including glassware, metal parts, polymer films, biological filters, and ceramic substrates—without risk of mechanical agitation or cross-contamination. Its stainless-steel interior (deep-drawn, seamless construction) and absence of internal welds eliminate crevices where particulates or residues may accumulate—critical for ISO 14644 cleanroom-adjacent use or USP drying validation. The oven complies with DIN EN 61000-6-3 (EMC), DIN EN 61000-6-2 (immunity), and carries CE marking per EU Machinery Directive 2006/42/EC. Optional documentation includes factory-calibrated temperature uniformity reports (per DIN 12880 Annex B) and individual test certificates traceable to national standards.
Software & Data Management
Celsius 2007 software enables full remote configuration, data logging, and protocol generation via USB or RS232 interface. It supports unlimited ramp-hold cycles, real-time graphing of temperature vs. time, and export of CSV-formatted datasets compatible with LIMS and statistical process control platforms. All operational parameters—including setpoints, actual values, error codes, timestamps, and sensor diagnostics—are stored in a 1024 kB circular memory buffer (≈6 months at 1-minute sampling). Audit trail functionality meets FDA 21 CFR Part 11 requirements when used with password-protected user roles and electronic signature options. Optional STERI chip cards enable validated sterilization cycles (e.g., 160 °C for 4 h), while XL memory cards support offline programming and data archival.
Applications
- Moisture content determination per ASTM D2231, ISO 787-2, or pharmacopoeial methods (USP )
- Thermal aging studies of polymers, adhesives, and coatings per ISO 188 or ASTM D573
- Drying of gravimetric samples prior to ashing or elemental analysis (e.g., EPA Method 1669)
- Preconditioning of reference materials and calibration standards
- Low-stress curing of thin-film coatings and printed electronics
- Stability testing of excipients and active pharmaceutical ingredients (APIs) under ICH Q1A guidelines
FAQ
What is the chamber volume and internal dimensions of the UNB400?
The UNB400 offers an internal capacity of approximately 53 L, with internal dimensions of 400 mm (W) × 400 mm (H) × 330 mm (D).
Does the UNB400 support GMP/GLP-compliant data integrity?
Yes—when paired with Celsius 2007 software and configured with user access controls, electronic signatures, and audit-trail logging, it fulfills core requirements of 21 CFR Part 11 and EU Annex 11.
Can the oven be validated for IQ/OQ/PQ protocols?
Absolutely. Memmert provides factory-issued calibration certificates, temperature uniformity maps, and technical documentation supporting qualification under ISO/IEC 17025-accredited laboratories.
Is external ventilation or exhaust ducting required?
Not inherently—but for volatile solvents or high-moisture loads, optional exhaust adapters and passive venting ports are available to maintain chamber integrity and operator safety.
What safety certifications does the UNB400 hold?
It conforms to EN 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and bears CE, EAC, and UKCA markings where applicable.
