Labotery DS24-45F Graphite Electric Heating Plate
| Brand | Labotery |
|---|---|
| Origin | Tianjin, China |
| Model | DS24-45F |
| Heating Power | 4 kW |
| Max. Temperature | 450 °C |
| Temperature Uniformity | ±2 °C |
| Plate Dimensions | 400 × 600 mm |
| Heating Zone | 380 × 580 mm |
| Display | Digital LED |
Overview
The Labotery DS24-45F Graphite Electric Heating Plate is a high-performance, benchtop thermal platform engineered for precise, uniform, and chemically resistant heating in analytical sample preparation workflows. Designed specifically for open-vessel digestion, acid reflux, solvent evaporation, and controlled thermal treatment of solid and liquid samples, it operates on the principle of resistive heating through a monolithic isostatically pressed graphite plate — a material selected for its exceptional thermal conductivity, dimensional stability at elevated temperatures, and outstanding resistance to strong mineral acids (e.g., HNO₃, HCl, HF, H₂SO₄) and alkaline media. Unlike metal or polymer-surfaced plates, graphite eliminates galvanic corrosion risks and avoids metallic contamination — a critical requirement for trace-metal analysis (e.g., ICP-MS, AAS) and regulatory-compliant environmental or food testing laboratories.
Key Features
- Monolithic isostatically pressed graphite heating surface — rated for continuous operation up to 450 °C with no delamination or surface degradation
- High thermal uniformity of ±2 °C across the full 380 × 580 mm active heating zone, verified per ASTM E220 calibration methodology
- Digital PID temperature controller with real-time setpoint display, adjustable ramp rates, and programmable hold profiles
- Integrated over-temperature protection and audible/visual alarm system compliant with IEC 61010-1 safety standards
- Timer-based auto-shutdown function supporting unattended overnight operations under GLP-controlled environments
- Robust stainless steel chassis with reinforced structural framing and non-slip rubber feet for vibration-dampened stability on laboratory benches
- Front-panel keypad with tactile feedback and IP20-rated enclosure for dust resistance in routine lab settings
Sample Compatibility & Compliance
The DS24-45F accommodates a wide range of sample containers including PTFE, quartz, borosilicate glass, and quartz-fused silica digestion vessels — all placed directly on the inert graphite surface without risk of leaching or catalytic interference. Its corrosion-resistant architecture meets ISO 17025 requirements for equipment suitability in accredited testing labs. The unit supports method validation under EPA Method 3050B (acid digestion of sediments, sludges, and soils), AOAC 999.10 (total arsenic in food), and USP heavy metals testing. It is compatible with standard laboratory fume hood installations and conforms to CE marking directives (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU).
Software & Data Management
While the DS24-45F operates as a standalone instrument with local digital control, optional RS-485 serial interface (available upon request) enables integration into centralized lab management systems via Modbus RTU protocol. This allows remote monitoring of setpoint, actual temperature, and operational status within LIMS or ELN platforms. Audit-trail-capable data logging (timestamped temperature records at user-defined intervals) can be implemented using third-party software compliant with FDA 21 CFR Part 11 requirements when paired with validated external controllers. All firmware updates are delivered via secure USB interface and include version-stamped changelogs traceable to ISO/IEC 17025 documentation.
Applications
- Open-beaker acid digestion of soil, sediment, plant tissue, and biological matrices prior to elemental analysis
- Controlled evaporation of digestates to near-dryness for subsequent reconstitution in dilute acid
- Pre-concentration of aqueous environmental samples (e.g., wastewater, groundwater) for anion/cation determination
- Thermal activation of catalysts and support materials in materials science research
- Standardized boiling point determination and solvent reflux in organic synthesis QC procedures
- Uniform pre-heating of reaction blocks in multi-vessel parallel digestion systems
FAQ
What materials are compatible with the graphite surface during high-temperature acid digestion?
PTFE, quartz, borosilicate glass, and fused silica vessels are fully compatible. Avoid aluminum, zinc, or copper-containing containers above 200 °C due to potential alloying or volatilization.
Does the DS24-45F meet GLP or GMP validation requirements?
Yes — its stable thermal profile, calibrated digital readout, and alarm/timer functions support IQ/OQ protocols. Full validation documentation (including as-found/as-left calibration reports) is available upon request.
Can the heating plate be used inside a fume hood without performance loss?
Yes — the unit operates effectively under standard fume hood airflow (0.3–0.5 m/s face velocity) with no impact on temperature accuracy or uniformity.
Is the graphite plate replaceable, and what is its expected service life?
The monolithic graphite plate is field-replaceable and designed for ≥5 years of daily use under typical digestion protocols (e.g., 3–5 hr/day at 300–400 °C). Lifespan extends significantly when operated below 400 °C and protected from mechanical impact.
What electrical infrastructure is required for safe installation?
A dedicated 220 V AC / 50 Hz circuit with minimum 20 A breaker and grounded outlet (Type F or Type C) is required. Use of a residual-current device (RCD) with ≤30 mA trip threshold is strongly recommended.
