Zhongke Aobo WB-3-6 Far-Infrared Microcrystalline Ceramic Electric Heating Plate
| Brand | Zhongke Aobo |
|---|---|
| Origin | Beijing, China |
| Model | WB-3-6 |
| Heating Power | 3 kW |
| Max. Heating Temperature | 600 °C |
| Temperature Uniformity | ±2–5 °C |
| Plate Dimensions | 400 × 280 mm |
| Heating Zone Dimensions | 400 × 280 mm |
| Display Type | Digital LCD |
Overview
The Zhongke Aobo WB-3-6 Far-Infrared Microcrystalline Ceramic Electric Heating Plate is a precision-controlled laboratory heating platform engineered for sample preparation, open-vessel digestion, drying, calcination, and thermal conditioning in analytical, environmental, pharmaceutical, and materials science laboratories. Unlike conventional resistive hot plates, this unit employs far-infrared radiation generated by embedded high-density heating elements beneath a 6 mm-thick German-sourced microcrystalline glass surface—enabling efficient, flameless energy transfer with minimal thermal lag and superior spatial temperature uniformity across the entire 400 × 280 mm active zone. Its design conforms to fundamental requirements of ISO/IEC 17025-compliant thermal instrumentation: stable setpoint maintenance, low thermal drift, and reproducible heat distribution under continuous operation at up to 600 °C. The absence of exposed coils or open flames eliminates ignition hazards, making it suitable for use with flammable solvents, acid digestions (e.g., HNO₃/HF mixtures), and moisture-sensitive samples.
Key Features
- PID-based digital temperature control with ±1 °C accuracy across the full 20–600 °C operating range (ambient +20 °C to 600 °C), ensuring repeatable thermal profiles for standardized methods such as EPA Method 3050B or ASTM D5630.
- 6 mm thick, high-purity microcrystalline ceramic plate (Schott CERAN®-grade equivalent) offering exceptional chemical resistance to strong acids (including hydrofluoric acid), alkalis, and organic solvents—validated per DIN EN 12879 for laboratory surface durability.
- Far-infrared heating architecture delivering rapid thermal response (<15 min to reach 500 °C from ambient) and uniform surface distribution (±2–5 °C across the heating zone), critical for consistent sample evaporation and residue homogeneity in gravimetric analysis.
- Robust cold-rolled steel housing with electrostatic epoxy coating, integrated stainless-steel thermal barrier layer, and grounded chassis—meeting IEC 61010-1 safety requirements for laboratory electrical equipment.
- LCD display interface showing real-time temperature, setpoint, timer status, and system alerts—including overtemperature cutoff and audible alarm activation at user-defined thresholds.
Sample Compatibility & Compliance
The WB-3-6 accommodates standard laboratory vessels including borosilicate glass beakers (up to 1000 mL), PTFE digestion cups, quartz crucibles, and ceramic boats. Its non-porous, inert surface prevents cross-contamination and supports GLP/GMP-aligned cleaning protocols (autoclavable wipe-downs, nitric acid passivation). The unit complies with CE marking directives (2014/30/EU EMC and 2014/35/EU LVD), and its thermal performance aligns with ISO 17025 clause 6.4.3 on equipment suitability for intended use. While not intrinsically rated for hazardous locations, its flameless operation and grounding provisions support safe deployment in Class 1, Division 2 environments when installed per NEC Article 500.
Software & Data Management
This model operates as a standalone analog-digital hybrid instrument with no embedded firmware or network connectivity. All operational parameters—including temperature setpoint, dwell time, and alarm thresholds—are configured manually via front-panel keypad. For audit-trail compliance in regulated labs (e.g., FDA 21 CFR Part 11 environments), external data loggers (e.g., Omega OM-DAQPRO-5300) may be connected via optional 0–5 V analog output (available upon request). Calibration certificates traceable to NIM (National Institute of Metrology, China) are provided with each unit; annual recalibration is recommended per ISO/IEC 17025 Clause 6.6.
Applications
- Open-beaker acid digestion of soil, sediment, and biological tissues prior to ICP-OES or ICP-MS analysis.
- Controlled evaporation of solvent extracts in pesticide residue testing (AOAC 2007.01).
- Drying and ashing of filter papers in particulate matter (PM₁₀/PM₂.₅) gravimetric analysis (EPA Method 201A).
- Pre-heating and thermal equilibration of calibration standards in titrimetric and photometric workflows.
- Low-risk thermal treatment of catalyst supports and metal oxide precursors in materials synthesis labs.
FAQ
What is the maximum load capacity of the WB-3-6 heating surface?
The plate supports up to 5 kg distributed evenly across the 400 × 280 mm zone. Exceeding this may compromise thermal uniformity and accelerate long-term microcrystalline surface fatigue.
Is the microcrystalline glass surface resistant to hydrofluoric acid exposure?
Yes—the plate material exhibits validated resistance to brief, low-concentration HF contact (≤5 % v/v); however, prolonged immersion or undiluted HF will etch the surface. Always follow Schott CERAN® handling guidelines for aggressive fluorides.
Does the unit include a built-in data logging function?
No. The WB-3-6 is a manually operated instrument without internal memory or USB/RS-232 interfaces. External recording requires third-party thermocouple-based dataloggers.
What is the recommended calibration interval for routine QC use?
Annual calibration against NIST-traceable reference thermometers is advised. In high-throughput digestion labs, quarterly verification using calibrated PT100 probes is recommended per ISO/IEC 17025 Section 6.6.3.
Can this heating plate be used inside a fume hood?
Yes—its sealed construction, absence of moving parts, and low electromagnetic emissions permit safe operation within ventilated enclosures. Ensure adequate clearance (≥10 cm) around all sides for convective cooling and airflow integrity.
