BOXUN SPX-250B-Z Biochemical Incubator

Overview

The BOXUN SPX-250B-Z Biochemical Incubator is a precision-engineered, microprocessor-controlled environmental chamber designed for stable, reproducible temperature regulation in life science laboratories. It operates on a Peltier-free resistive heating principle with proportional-integral-derivative (PID) feedback control, ensuring minimal thermal overshoot and long-term stability across its operational range of 5–50 °C. Engineered for routine microbiological cultivation, BOD incubation, fungal propagation, and plant tissue maintenance, the unit meets fundamental requirements for GLP-compliant workflows in academic, pharmaceutical quality control, and public health laboratories. Its robust architecture—featuring a cold-rolled steel exterior with electrostatic powder coating and a mirror-finish 304 stainless steel interior—resists corrosion from repeated disinfection cycles and organic solvent exposure common in biochemical handling.

Key Features

• High-accuracy microcomputer PID temperature controller with 0.1 °C resolution and ±0.5 °C fluctuation specification (verified per ISO 13485-aligned internal calibration protocol)
• Dual-digit LED display with independent setpoint and actual temperature readouts—designed for rapid visual verification under ambient lab lighting
• Three independently adjustable, load-rated stainless steel shelves (standard configuration), enabling flexible vertical arrangement for Petri dishes, flasks, or multi-well plates
• Integrated interior LED illumination and large-area, low-emissivity vacuum-insulated tempered glass door—optimized for non-intrusive observation without thermal disturbance
• Power-loss recovery function with non-volatile memory retention: all active parameters—including set temperature, timer value, and elapsed time—are preserved during unexpected outages and automatically restored upon re-powering
• Programmable timer with 0–999 h range supports unattended overnight or multi-day incubation protocols; supports both countdown and cumulative timing modes

Sample Compatibility & Compliance

The SPX-250B-Z accommodates standard microbiological containers including 90 mm Petri dishes (up to 42 per shelf), 250 mL Erlenmeyer flasks (up to 18 per shelf), and 6-well tissue culture plates. Its interior volume (250 L nominal) and uniform airflow design—achieved via rear-mounted convection fan and optimized baffle geometry—deliver ±1 °C uniformity at 37 °C, satisfying ASTM E1755-22 criteria for incubator performance validation. The unit complies with IEC 61010-1:2010 safety standards for laboratory electrical equipment and incorporates overtemperature cut-off protection (independent mechanical backup thermostat). While not certified to FDA 21 CFR Part 11, its parameter logging capability supports audit-ready documentation when integrated with external data acquisition systems compliant with GxP record-keeping requirements.

Software & Data Management

The SPX-250B-Z operates as a standalone instrument with no embedded software stack or network interface. All user interaction occurs via tactile membrane keypad and dual 4-digit LED displays. Parameter changes are confirmed by audible beep and immediate display update, minimizing input error. Though it lacks USB/RS-232 connectivity or cloud synchronization, its deterministic behavior—combined with built-in power-fail memory—ensures traceability of operational history within defined procedural constraints. For labs requiring electronic records, integration with validated third-party environmental monitoring platforms (e.g., DeltaTrak, SensiLog) is achievable using optional analog output modules (0–5 V or 4–20 mA) installed externally per site-specific IQ/OQ protocols.

Applications

• Biochemical oxygen demand (BOD₅) testing per APHA Standard Methods 5210B and ISO 5815-1
• Cultivation of mesophilic bacteria (e.g., Escherichia coli, Staphylococcus aureus) and fungi (Aspergillus niger, Candida albicans) for QC release testing
• Maintenance of stock cultures at sub-critical temperatures (e.g., 4–8 °C for short-term preservation, 25–30 °C for yeast propagation)
• Plant seed germination and seedling acclimatization studies under controlled thermal conditions
• Environmental monitoring of water and soil samples in municipal and agricultural laboratories per WHO and EPA guidelines

FAQ

Does the SPX-250B-Z support refrigerated operation below 5 °C?
No. This model is a convection-heating-only incubator and does not include active cooling; its lower temperature limit is 5 °C ambient-referenced.
Is the interior humidity controlled?
No. The SPX-250B-Z provides temperature regulation only; relative humidity is uncontrolled and follows ambient lab conditions. For humidity-sensitive applications, supplemental humidification trays or external RH chambers are recommended.
Can the unit be validated for ISO/IEC 17025 accreditation?
Yes—its thermal performance metrics (uniformity, fluctuation, recovery time) are measurable using NIST-traceable thermistors or calibrated data loggers, supporting IQ/OQ documentation per ISO/IEC 17025:2017 Clause 6.4.
What maintenance intervals are recommended?
Monthly inspection of door gasket integrity and quarterly cleaning of rear ventilation grilles with isopropyl alcohol; annual verification of temperature sensor calibration against reference standard is advised for regulated environments.