CZGY DB-4A Liquid Crystal Stainless Steel Electric Heating Plate
| Brand | CZGY |
|---|---|
| Origin | Jiangsu, China |
| Manufacturer Type | Direct Manufacturer |
| Model | DB-4A |
| Heating Power | 3000 W |
| Max. Operating Temperature | 300 °C |
| Temperature Uniformity | ±1 °C |
| Heating Surface Dimensions | 500 × 400 mm |
| Display Type | LCD |
| Temperature Resolution | 0.1 °C |
| Input Voltage | 220 V AC, 50 Hz |
Overview
The CZGY DB-4A Liquid Crystal Stainless Steel Electric Heating Plate is a precision-engineered benchtop thermal platform designed for controlled, uniform heating in sample preparation, digestion, evaporation, and drying applications across analytical, environmental, pharmaceutical, and academic laboratories. Built on the principle of resistive heating via embedded high-stability alloy heating elements beneath a solid stainless steel surface, the DB-4A delivers stable thermal output without open flames or moving parts—ensuring safety, repeatability, and compatibility with fume hoods and inert-atmosphere workstations. Its operational range (ambient to 300 °C) supports common acid digestion protocols (e.g., HNO₃/HF/HCl-based EPA Method 3050B, 3051A), gravimetric moisture analysis per ASTM D2231, and solvent evaporation under GLP-compliant conditions. The unit is engineered for continuous-duty operation with thermal cut-off protection and conforms to IEC 61010-1 safety standards for laboratory electrical equipment.
Key Features
- Robust 304 stainless steel heating surface (500 × 400 mm) offering exceptional corrosion resistance against aggressive reagents including concentrated mineral acids and alkaline solutions.
- Microprocessor-based PID temperature controller with LCD interface providing real-time setpoint and actual temperature readout at 0.1 °C resolution.
- High-power 3000 W heating system enabling rapid thermal ramping and maintenance of ±1 °C spatial uniformity across the full heating zone—verified per ISO/IEC 17025 calibration practices.
- Thermal insulation design minimizes heat loss to the base and surrounding environment, improving energy efficiency and reducing ambient lab temperature drift.
- Front-panel membrane keypad with intuitive navigation for temperature setting, timer activation (if equipped), and system status monitoring.
- Integrated over-temperature protection and automatic shutdown safeguarding both samples and operator during unattended operation.
Sample Compatibility & Compliance
The DB-4A accommodates standard laboratory vessels—including borosilicate glass beakers (up to 2 L), PTFE and quartz digestion tubes, ceramic crucibles, and stainless steel trays—without thermal distortion or surface adhesion. Its non-porous, seamless surface prevents residue buildup and facilitates cleaning between runs. The device meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU) and low-voltage safety (LVD Directive 2014/35/EU). While not intrinsically rated for hazardous locations, it is routinely deployed in ISO 17025-accredited labs performing trace metal analysis (e.g., ICP-MS sample prep) and complies with general Good Laboratory Practice (GLP) expectations for instrument qualification, including documented installation qualification (IQ), operational qualification (OQ), and routine performance verification.
Software & Data Management
The DB-4A operates as a standalone analog-digital hybrid instrument with no proprietary software dependency. All control logic resides in its embedded microcontroller; temperature logs are not internally stored but can be captured externally via optional RS-485 or 4–20 mA analog output modules (available as accessories). When integrated into automated workflows, the unit supports Modbus RTU protocol for bidirectional communication with LIMS or SCADA systems. Audit trail functionality—including operator ID, setpoint changes, and duration of active heating—is achievable only when paired with validated third-party data acquisition hardware compliant with FDA 21 CFR Part 11 requirements.
Applications
- Open-vessel acid digestion of soil, sediment, and biological tissues prior to elemental analysis (ICP-OES, AAS).
- Controlled evaporation of aqueous extracts and organic solvents in phytochemical and environmental testing (e.g., EPA 8270, 8082).
- Drying of filter papers, gravimetric precipitates, and moisture-sensitive reference standards per USP & Ph. Eur. guidelines.
- Pre-heating of reaction vessels and calibration standards in QC/QA laboratories supporting ISO/IEC 17025 scope accreditation.
- Temperature conditioning of viscosity standards and polymer melts during rheological method development.
FAQ
Is the DB-4A suitable for use with hydrofluoric acid (HF) digestion?
Yes—provided appropriate PTFE or quartz labware is used and the stainless steel surface is thoroughly rinsed post-use to prevent fluoride-induced pitting.
Does the unit include a built-in timer function?
Standard DB-4A models feature temperature-only control; timer functionality requires optional firmware upgrade or external programmable relay integration.
Can multiple DB-4A units be daisy-chained for synchronized operation?
No—each unit operates independently. Synchronization requires centralized PLC-level control via analog or digital I/O interfaces.
What calibration documentation is supplied with the instrument?
A factory-issued certificate of conformance (CoC) is included; NIST-traceable temperature calibration certificates are available upon request at additional cost.
Is the heating surface compatible with magnetic stirrers?
No—the DB-4A lacks magnetic coupling; however, it is fully compatible with external hotplate stirrers placed atop the surface, provided thermal load remains within specification limits.
