Thermo Scientific Heratherm IGS400 & IGS750 Large-Capacity General-Purpose Biochemical Incubators

Overview

The Thermo Scientific Heratherm IGS400 and IGS750 are large-capacity, general-purpose biochemical incubators engineered for precision temperature control in demanding life science laboratories. Designed around natural convection airflow—eliminating fan-induced vibration and desiccation—these incubators maintain stable, uniform thermal environments essential for microbial culture propagation, enzyme activity assays, cell line maintenance, and long-term stability studies. The absence of forced air ensures minimal mechanical stress on delicate biological samples while delivering reproducible thermal performance across the entire chamber volume. Both models operate within a calibrated range of ambient +5°C to 75°C, with stability maintained at ±0.4°C at 37°C—a critical benchmark for mammalian and bacterial growth applications. The electropolished stainless-steel interior features radius-corner construction to prevent microbial harborage and simplify cleaning validation under GLP and GMP frameworks.

Key Features

• Natural convection design eliminates airflow turbulence, preserving sample integrity during extended incubation periods
• Self-configuring over-temperature alarm system with automatic threshold derivation—no user calibration or manual setpoint entry required
• Full-height double-glazed internal glass door enables uninterrupted visual monitoring without compromising thermal stability or humidity retention
• Vacuum fluorescent display (VFD) with tactile keypad interface supports intuitive operation, even with gloved hands, and remains legible under low-light biosafety cabinet conditions
• Modular shelving architecture: two stainless-steel shelves included; up to 39 shelves configurable to optimize vertical space utilization for heterogeneous sample formats (e.g., stacked flasks, multiwell plates, Petri dishes)
• Standardized RS-232/RS-485 communication ports support integration with laboratory information management systems (LIMS), environmental monitoring platforms, and 21 CFR Part 11-compliant data loggers
• Lockable casters ensure secure positioning during operation and safe repositioning across shared lab spaces without requiring disassembly or recalibration
• Corrosion-resistant electropolished stainless-steel chamber with seamless welds and radius corners meets ISO 14644-1 Class 5 cleanroom-compatible cleaning protocols

Sample Compatibility & Compliance

The Heratherm IGS series accommodates diverse biological sample configurations—including Erlenmeyer flasks (up to 5 L), roller bottles, multi-tiered stackable trays, and high-density microplate arrays—without compromising thermal homogeneity. The chamber geometry is optimized for volumetric efficiency: the IGS750’s 1004 mm width allows side-by-side placement of two standard 500 mL baffled flasks on a single shelf, while maintaining ≥100 mm clearance from sidewalls per ASTM E171-22 recommendations for convective uniformity. All models comply with IEC 61010-1:2010 safety standards for laboratory equipment and incorporate redundant thermal protection circuits validated per UL 61010-1. Optional IQ/OQ documentation packages are available to support FDA-regulated workflows, including traceable calibration certificates aligned with ISO/IEC 17025 requirements.

Software & Data Management

While the Heratherm IGS series operates as a standalone instrument with embedded firmware, its native serial interface enables seamless connectivity to third-party validation and monitoring software suites such as Thermo Fisher’s SampleManager LIMS, Eurotherm iTools, or custom Python-based data acquisition scripts using Modbus RTU protocol. Real-time temperature logs can be streamed at 1-second intervals and timestamped with NTP-synchronized clocks when paired with compliant external recorders. Audit trails—including parameter changes, door openings, and alarm events—are retained onboard for ≥30 days and exportable in CSV or PDF format for regulatory review. Firmware updates are delivered via secure USB key to maintain cybersecurity compliance in network-isolated laboratory environments.

Applications

• Bacterial and fungal cultivation under aerobic and microaerophilic conditions (e.g., E. coli, S. aureus, C. albicans)
• Long-term stability testing of biologics, vaccines, and diagnostic reagents per ICH Q5C guidelines
• Enzyme kinetics studies requiring sustained thermal constancy over 72+ hour durations
• Cell line expansion and passaging where vibration-sensitive adherent cultures (e.g., primary neurons, iPSCs) necessitate fanless operation
• Environmental simulation for accelerated aging of medical device packaging materials per ASTM F1980
• Quality control incubation for pharmaceutical water systems (PW, WFI) per USP and

FAQ

What is the difference between natural convection and forced-air incubation?

Natural convection relies on thermally driven buoyancy currents to distribute heat—ideal for vibration-sensitive cultures and minimizing evaporation in uncovered vessels. Forced-air systems use fans that may introduce shear stress and accelerate medium desiccation.
Can these incubators be validated for GxP environments?

Yes. With optional IQ/OQ documentation, NIST-traceable sensor calibration reports, and audit-trail-enabled data loggers, both IGS400 and IGS750 meet baseline requirements for GLP, GMP, and 21 CFR Part 11 compliance.
Is humidity control available as an option?

No. The Heratherm IGS series is designed as a dry incubator. For humidity-dependent applications, Thermo Scientific recommends the HeraCell series with active humidification and CO₂ control.
How many shelves can be installed without affecting temperature uniformity?

Up to 39 shelves may be installed, but optimal uniformity (±0.5°C) is guaranteed only when using the standard 2-shelf configuration. Load distribution and spacing must follow Thermo Fisher’s Chamber Loading Guide (P/N 88003901) to maintain thermal certification.
Are replacement parts and service support available globally?

Yes. Thermo Fisher maintains certified service centers across North America, EMEA, and APAC, with spare parts inventory including VFD modules, PID controllers, and chamber insulation kits backed by a 2-year limited warranty.