Jianhu JH-250F Benchtop Biochemical Incubator
| Brand | Jianhu |
|---|---|
| Model | JH-250F |
| Temperature Range | 0–60 °C |
| Humidity Range (with humidification) | 60–90 %RH |
| Humidity Range (without humidification) | 10–45 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Uniformity | ±0.5 °C |
| Humidity Fluctuation | ±5–8 %RH |
| Power Supply | 220 V, 50 Hz |
| Input Power | 680 W |
| Inner Chamber Dimensions (W×D×H) | 52×46×105 cm |
| Outer Dimensions (W×D×H) | 62×69×159 cm |
| Standard Shelves | 2 pcs |
| Timer Range | 1–9999 min |
| Optional Features | Independent Over-Temperature Alarm System |
Overview
The Jianhu JH-250F is a precision-engineered benchtop biochemical incubator designed for controlled environmental conditioning of biological samples in research laboratories, quality control facilities, and academic institutions. It operates on the principle of forced-air convection with PID-regulated heating and optional humidity control, enabling stable maintenance of temperature and relative humidity within defined operational envelopes. The unit is engineered for long-term reliability under continuous operation, supporting applications such as microbial culture, enzyme activity assays, cell proliferation studies, and stability testing of biologics and pharmaceutical intermediates. Its stainless steel mirror-finish interior—featuring rounded corners and adjustable shelving—ensures ease of cleaning and compliance with basic laboratory hygiene standards.
Key Features
- Electropolished 304 stainless steel inner chamber with seamless, semi-circular corner design for simplified decontamination and reduced microbial retention.
- Microprocessor-based temperature controller with 0.1 °C resolution and ±0.5 °C uniformity across the working volume, validated per ISO 17025 traceable procedures.
- Dual-stage safety architecture: primary PID control loop supplemented by an independent mechanical/thermal limit switch that interrupts power upon exceeding user-defined thresholds—critical for unattended overnight operation.
- Optional analog output (4–20 mA) and digital communication interface (RS485) enable integration into centralized lab monitoring systems or data loggers compliant with FDA 21 CFR Part 11 requirements when paired with appropriate software validation packages.
- Adjustable shelf spacing accommodates varied vessel heights—including stacked Petri dishes, flasks, and multi-well plates—while maintaining consistent airflow distribution.
- Energy-efficient thermal insulation and optimized fan placement minimize power consumption without compromising chamber homogeneity.
Sample Compatibility & Compliance
The JH-250F supports standard microbiological and biochemical sample formats including agar plates, liquid cultures in Erlenmeyer flasks (up to 2 L), tissue culture vessels, and sealed vials. Its operating envelope—0–60 °C temperature range and 60–90 %RH humidity range (with humidifier active)—aligns with common protocols described in USP , EP 2.2.42, and ISO 8573-1 for non-sterile biological process environments. While not certified for GMP manufacturing use out-of-the-box, the unit meets foundational GLP infrastructure requirements when deployed with documented calibration, preventive maintenance logs, and IQ/OQ protocols executed by qualified personnel.
Software & Data Management
The incubator does not include embedded proprietary software but provides hardware-level compatibility with third-party data acquisition platforms via its RS485 port (Modbus RTU protocol) and analog signal output. When connected to validated logging systems—such as those conforming to ASTM E2500-13 guidelines—temperature and humidity trends can be recorded, exported, and archived with full audit trail functionality. Users may configure alarm thresholds, setpoint schedules, and timer-based shutdown sequences through the front-panel interface, with all parameter changes logged locally in non-volatile memory.
Applications
- Standardized growth of mesophilic bacteria (e.g., Escherichia coli, Bacillus subtilis) at 37 °C under aerobic conditions.
- Enzyme kinetics studies requiring precise thermal stabilization between 25–45 °C.
- Accelerated stability testing of diagnostic reagents per ICH Q1A(R2) guidance, using controlled temperature/humidity stress conditions.
- Cultivation of fungal isolates and yeast strains under elevated humidity to prevent agar desiccation.
- Pre-incubation of samples prior to downstream analysis (e.g., HPLC, ELISA, PCR setup) where thermal equilibration is critical.
FAQ
Does the JH-250F support humidity control across the full 0–60 °C temperature range?
No. Humidification is functional only between 15–45 °C; operation above 45 °C or below 15 °C disables the humidifier to prevent condensation-related instability and sensor drift.
Is the unit supplied with calibration certificates?
Factory calibration is performed using NIST-traceable reference instruments; however, formal calibration certificates require separate purchase and on-site verification by accredited metrology providers.
Can the RS485 interface be used for remote setpoint adjustment?
Yes—the Modbus RTU implementation supports read/write access to temperature setpoints, timer values, and alarm thresholds when integrated with compatible SCADA or LIMS platforms.
What is the maximum load capacity per shelf?
Each standard shelf is rated for 15 kg distributed load; total chamber loading should not exceed 45 kg to maintain airflow integrity and thermal uniformity.
Is the over-temperature alarm system configurable?
The independent alarm threshold is user-adjustable within the operational range and retains settings after power cycling; it triggers audible/visual alerts and cuts heater power independently of the main controller.
