Brookfield SPX-250B-ZII Biochemical Incubator

Overview

The Brookfield SPX-250B-ZII Biochemical Incubator is a precision-engineered, actively cooled environmental chamber designed for stable, long-term cultivation and maintenance of microorganisms, cell cultures, plant tissues, and biochemical samples under tightly controlled temperature conditions. Operating on a forced-air convection principle with variable-speed fan modulation, the unit ensures uniform thermal distribution across its 170-L working volume while minimizing sample desiccation and thermal stratification. Its temperature control range spans 0 to 60 °C—covering standard mesophilic bacterial growth (e.g., Escherichia coli, Bacillus subtilis), fungal incubation (e.g., Aspergillus, Candida), BOD₅ testing per ISO 5815-1, and low-temperature preservation protocols used in environmental microbiology and aquatic toxicology studies. The system employs an R134a refrigerant-based vapor-compression cycle integrated with a high-efficiency inverter-driven compressor, enabling continuous frost-free operation across the full temperature span without manual defrost cycles—a critical requirement for uninterrupted incubation in GLP-compliant water quality laboratories and QC environments.

Key Features

• PMMAI-based intelligent control system with capacitive touch interface and backlit LCD display for intuitive parameter entry and real-time monitoring of setpoint, actual temperature, elapsed time, and system status;
• Six-stage programmable airflow regulation to match aerodynamic requirements of diverse biological loads—from delicate mycelial growth to dense bacterial suspensions—reducing evaporative loss while maintaining homogeneity;
• Double-wall vacuum-insulated observation window fabricated from tempered safety glass, offering optical clarity and minimized thermal leakage during routine visual inspection;
• Interior chamber constructed from electropolished stainless steel (AISI 304) with seamless welded corners; exterior housing formed from cold-rolled steel with epoxy-polyester electrostatic coating for corrosion resistance and cleanroom-compatible surface integrity;
• Integrated 220 V AC power outlet inside the chamber for direct connection of peripheral instrumentation (e.g., dissolved oxygen probes, pH loggers, or mini-peristaltic pumps);
• Comprehensive safety architecture including over-temperature cut-off, hardware-level fault detection, automatic restart after power interruption, and audible/visual alarm activation upon deviation exceeding user-defined thresholds.

Sample Compatibility & Compliance

The SPX-250B-ZII supports a broad spectrum of life science applications requiring stable thermal environments, including but not limited to: aerobic/anaerobic microbial culture per ASTM D5210, seed germination assays per ISO 11268-2, algal growth inhibition tests (OECD 201), and pharmaceutical stability testing under ICH Q1A(R2) intermediate storage conditions. Its temperature uniformity of ±1.5 °C at 37 °C meets the performance criteria specified in ISO 15378:2017 for incubators used in GMP-grade media preparation. All electrical components comply with IEC 61010-1 safety standards for laboratory equipment, and firmware design incorporates audit-trail-capable event logging suitable for FDA 21 CFR Part 11–aligned data integrity workflows when paired with validated external software platforms.

Software & Data Management

While the SPX-250B-ZII operates as a standalone instrument with embedded firmware, it provides RS-485 serial communication capability (Modbus RTU protocol) for integration into centralized laboratory infrastructure. Third-party SCADA systems or LIMS platforms can poll real-time temperature values, alarm states, and timer status at configurable intervals. Optional USB data logger modules (sold separately) enable time-stamped CSV export of up to 30 days of continuous temperature history with 1-minute resolution—facilitating retrospective analysis required under GLP Annex 11 and ISO/IEC 17025:2017 clause 7.7. Calibration verification reports generated via the onboard diagnostic menu support traceable metrological validation against NIST-traceable reference thermometers.

Applications

• Environmental monitoring labs conducting BOD₅, COD, and coliform enumeration per APHA Standard Methods 2540D and EPA Method 1681;
• Pharmaceutical quality control units performing microbial limit testing (USP <61>) and sterility test incubation (USP <71>);
• Agricultural research institutes executing soil respiration assays, rhizobium symbiosis studies, and phytopathogen culture propagation;
• Fisheries and aquaculture facilities maintaining live feed cultures (e.g., Artemia, rotifers) and pathogen challenge trials;
• Academic teaching laboratories supporting undergraduate microbiology, molecular biology, and plant physiology curricula with reproducible, low-maintenance incubation environments.

FAQ

What is the maximum number of shelves that can be installed without compromising temperature uniformity?
Up to seven shelves may be fitted; however, for optimal thermal consistency per ISO 15378, Brookfield recommends no more than five shelves when operating above 45 °C.
Is the internal 220 V outlet rated for continuous load?
Yes—the outlet is fused at 3 A and certified for continuous duty up to 660 W total draw, provided ambient room temperature remains below 30 °C.
Does the unit support remote monitoring via Ethernet or Wi-Fi?
No native Ethernet or Wi-Fi interface is included; connectivity requires an external RS-485-to-Ethernet gateway compatible with Modbus TCP mapping.
Can the incubator maintain 4 °C for cold-adapted organism cultivation?
Yes—the 0–60 °C range includes precise stabilization at 4 °C, though extended operation below 10 °C may reduce compressor service life due to increased cycling frequency.
Is calibration documentation provided with shipment?
Each unit ships with a factory-issued calibration certificate covering temperature accuracy at three points (10 °C, 37 °C, and 55 °C) verified using a Fluke 1524 thermometer and accredited dry-block calibrator.