MEMMERT INE400 Natural Convection Incubator

Overview

The MEMMERT INE400 is a precision-engineered natural convection incubator designed for stable, uniform thermal environments in life science laboratories. Unlike forced-air systems, it relies on gravity-driven air movement—eliminating turbulence and shear stress critical for sensitive cell cultures, microbiological assays, and enzyme activity studies. Its thermally optimized chamber features full insulation, stainless steel (1.4301 / ASTM 304) construction, and quadrilateral heating elements ensuring minimal thermal gradients. The device operates across a wide temperature range of 20 °C to 70 °C (standard), with optional extension up to 250 °C (model-dependent configuration). It complies with DIN 12880 for temperature uniformity verification and meets GLP data integrity requirements through built-in 1024 kB circular memory logging.

Key Features

• Natural convection design with manually adjustable fresh-air mixing damper and dedicated exhaust port with throttle valve
• Dual A-class Pt100 temperature sensors (4-wire circuitry) for redundant monitoring and fault-tolerant operation
• PID-based microprocessor controller with fuzzy logic algorithm and integrated self-diagnostic system including error indication
• 7-day programmable timer with real-time clock; temperature setpoints and ramp profiles configurable to the minute
• Up to four independent time-temperature segments per program, each adjustable from 1 minute to 999 hours
• Repeat function supporting 1–99 cycles or infinite loop execution of defined thermal profiles
• Digital LED display showing setpoint, actual temperature, day/time, program status, and diagnostic flags at 0.1 °C resolution
• Triple-stage overtemperature protection: (1) electronic microprocessor TWW controller (Class 3.1), (2) mechanical temperature limiter TB (~10 K above max chamber temp), and (3) fixed +3 K cutoff relative to setpoint
• Stainless steel exterior (zinc-coated rear panel), double-locking insulated door with inner glass viewport, and deep-drawn 304 stainless steel interior
• RS232 interface with included Celsius 2007 software for remote programming, real-time monitoring, and GLP-compliant data export

Sample Compatibility & Compliance

The INE400 accommodates standard microbiological and cell culture vessels—including Petri dishes, flasks, multiwell plates, and test tubes—within its 53 L chamber (400 × 400 × 330 mm internal dimensions). Four sliding stainless steel shelves (max. load 30 kg per shelf, 90 kg total) support flexible configuration. Its natural convection architecture minimizes desiccation and mechanical disturbance, making it suitable for CO₂-independent applications such as BOD testing, seed germination, and stability studies per ICH Q1A(R3). The unit ships with a certified 37 °C calibration certificate traceable to national standards and conforms to EN 61000-6-2/6-4 (EMC), EN 61010-1 (safety), and supports audit readiness under FDA 21 CFR Part 11 when used with Celsius software’s user access control and electronic signature modules.

Software & Data Management

Celsius 2007 (Windows-compatible, tested on NT4 through Windows Vista) enables full remote control via RS232, including unlimited ramp-segment programming, real-time graphing, and automated report generation. All operational parameters—including setpoint, actual temperature, date/time stamps, alarm events, and sensor diagnostics—are stored in a non-volatile 1024 kB ring buffer with timestamped entries. Data retention spans approximately six months at 1-minute logging intervals. Optional parallel printer interface (PCL3-compatible) allows direct hardcopy output; USB conversion adapters are available separately. For sterilization validation, the STERI card provides a predefined 4-hour, 160 °C cycle, while XL memory cards (32 kB capacity) store up to 40 program segments for offline deployment.

Applications

• Microbial growth studies (e.g., ISO 8573-7, USP , EP 2.6.12)
• Enzyme kinetics and protein stability assays requiring low-vibration thermal environments
• Biochemical incubation for ELISA plate development and antibody binding steps
• Pharmaceutical stability testing (ICH Q5C, Q1A)
• Seed viability and plant tissue culture under controlled ambient conditions
• Material aging tests for medical device packaging (ISO 11607-1)
• Quality control incubation in food safety labs (AOAC, ISO 6579)

FAQ

What is the temperature uniformity specification at 37 °C?
At 37 °C, temperature uniformity across the working volume complies with DIN 12880 and is ≤ ±0.6 °C.
Does the INE400 support GLP-compliant data archiving?
Yes—the integrated 1024 kB circular memory logs all setpoints, measured values, timestamps, and error codes, satisfying GLP record retention requirements.
Can the incubator be operated without a PC connection?
Yes—full local control is available via front-panel buttons and 8-character alphanumeric display; PC connectivity is optional for advanced programming and reporting.
Is the unit suitable for use with CO₂-sensitive samples?
Yes—natural convection avoids air exchange artifacts common in forced-air units, preserving headspace composition for non-CO₂-dependent cultures.
What safety certifications does the INE400 hold?
It conforms to EN 61010-1 (electrical safety), EN 61000-6-2/6-4 (EMC immunity/emission), and carries CE marking for the European Economic Area.