Electrophoresis Tank and Power Supply
Introduction
Electrophoresis Tank and Power Supply units are the core hardware behind reliable DNA, RNA, and protein separations. This guide explains how an Electrophoresis Tank and Power Supply work together, the key specifications that matter, and how to select a system that fits your laboratory’s throughput and safety requirements.
What Is Electrophoresis Tank and Power Supply?
An electrophoresis tank (chamber) holds the gel and buffer to provide a stable medium for separation under an electric field, while the power supply delivers controlled voltage and current across the gel. Together they enable size- and charge-based migration for applications like DNA fingerprinting, RNA integrity checks, PCR product analysis, protein profiling (e.g., SDS-PAGE), and pharmaceutical quality control.
Devices in This Category
Horizontal agarose gel tank (submarine chamber)
Vertical SDS-PAGE tank with casting stand
Mini/compact electrophoresis tank for rapid screens
Multi-tier tank with passive/active cooling
Single-channel electrophoresis power supply
Multi-channel programmable power supply with data logging
Technical Features and Specifications
FeatureDetails
Tank MaterialsChemical-resistant acrylic or polycarbonate with leak-proof seals
Safety Lid & InterlockLatching lid with power-off interlock to prevent electric shock
CoolingPassive heat dissipation; optional recirculating or plate cooling for long/high-voltage runs
CompatibilitySupports multiple tray sizes, comb formats, and buffer volumes with level indicators
Voltage & Current Range0–300 V (or higher) with precise current limiting and constant V/I modes
Control & ProgramsTimer, memory presets, step/ramp programs, programmable shutdown
OutputsSingle or multiple output channels for running several gels simultaneously
Data & ConnectivityRun logging with display interface; optional export for documentation and QA
Benefits
Efficient, high-resolution separation of nucleic acids and proteins.
Customizable voltage, current, and timing for diverse applications.
Built-in safety interlocks and overload protection for safer operation.
Reproducible runs supported by precise controls and data logging.
Scalable options from teaching labs to multi-gel, high-throughput workflows.
Applications and Tests
🔬 Molecular Biology
PCR product analysis and cloning checksDNA/RNA integrity assessment and sizingRestriction digest verification and genotyping
🧪 Clinical Diagnostics
Fragment analysis for genetic testingProtein profiling (SDS-PAGE) in clinical researchQuality control of diagnostic amplicons
🏭 Industrial & Food Testing
GMO screening and identity testingProcess QC for biopharmaceuticalsMicrobial strain verification
🌱 Environmental & Agricultural Labs
Pathogen detection in water/soilMarker-assisted selection and barcodingBiodiversity and population studies
Electrophoresis Tank and Power Supply vs. Capillary Electrophoresis
AspectElectrophoresis Tank & Power SupplyCapillary Electrophoresis
Sample TypesDNA, RNA, and proteins on gelsPrimarily DNA/RNA fragments in capillaries
Cost & SetupModerate cost; short setupHigher cost; moderate setup
ResolutionHigh (gel-dependent)Very high
ThroughputMedium; multiple gels with multi-channel PSUsLow to medium
Use CaseVersatile, teaching to research; cost-effective QCPrecision sizing/fragment analysis
Expert Tips for Choosing the Right Electrophoresis Device
Match tank format (horizontal vs vertical) to target molecules (nucleic acids vs proteins).
Choose power supplies with programmable steps, timers, and sufficient voltage/current headroom.
Prioritize safety: interlock lids, overvoltage/overcurrent protection, and leak-resistant designs.
Plan for scalability with multi-output channels and modular gel sizes.
Verify documentation, warranty, and local service availability before purchase.
Maintenance Best Practices
Rinse tanks and trays after each run; avoid buffer salt buildup on electrodes.
Inspect cables, banana plugs, and electrode plates regularly for corrosion.
Keep buffer volumes within marked levels to prevent overheating or running dry.
Periodically verify power supply output with a calibrated multimeter.
Record run parameters and maintenance in a logbook for reproducibility and QA.
FAQ
Q: What voltage should I use for agarose gel electrophoresis?
A: A typical range is 80–150 V; lower voltages improve resolution but increase run time.
Q: Can one power supply run multiple electrophoresis tanks?
A: Yes, if it provides multiple output channels and adequate power; ensure each channel’s limits match your gel requirements.
Q: Is a cooling system necessary?
A: For high-voltage or long runs, cooling helps prevent gel distortion and buffer degradation, improving band quality.
Q: What common mistakes should I avoid?
A: Don’t run with low/dry buffer, avoid exceeding recommended voltage, cast gels evenly, and always record settings for reproducibility.
