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AutoRep S
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With ergonomic features
Mettler Toledo Electronic Repeater Pipette
The Mettler Toledo AutoRep electronic repeater sampling tool is a high-performance liquid handling instrument engineered for repetitive dispensing tasks with maximum precision. Technically, it operates on the positive-displacement principle, utilizing specialized syringes to handle a vast range of liquid types, including viscous, volatile, or high-density fluids, without the risk of cross-contamination.
The electronic version, the AutoRep E, features a microprocessor-controlled motor that automates the dispensing process, significantly reducing operator fatigue and eliminating the variability associated with manual thumb force. This makes it an ideal technical solution for multi-dispensing protocols where consistency across hundreds of aliquots is required.
Positive Displacement Technical Framework
The AutoRep series technically utilizes the positive-displacement principle, which is essential for handling difficult liquids.3 Unlike air-displacement tools, the piston of the syringe tip comes into direct contact with the liquid. This eliminates the air cushion that can be affected by the physical properties of the fluid. Consequently, the AutoRep E provides superior accuracy when dispensing viscous liquids (like glycerol), volatile solvents (like ethanol), or high-vapor-pressure fluids, ensuring that the volume delivered is independent of the liquid's density or temperature.
Microprocessor-Controlled Precision and Automation
The AutoRep E version is powered by a sophisticated microprocessor that manages the motor-driven piston movement.4 This technical automation ensures that the aspiration and dispensing speeds are perfectly consistent for every cycle. By automating the aliquoting process, the instrument eliminates human-induced errors such as inconsistent thumb pressure or timing. The electronic motor performs the mechanical work, allowing the user to dispense up to 100 times from a single aspiration with high repeatability and precision across all aliquots.
Automatic Syringe Tip Recognition
A key technical feature of the AutoRep E is its ability to automatically recognize the size of the inserted Encode syringe tip.5 The instrument features a built-in sensor that reads the coding on the tip and immediately displays the correct volume on the digital screen. This prevents manual entry errors and ensures that the calculations for multi-dispensing are technically accurate from the moment the tip is attached. This "plug-and-play" functionality streamlines the workflow and enhances data integrity in regulated environments.
Versatile Operational Modes for Lab Efficiency
The software architecture of the AutoRep E includes three primary technical modes: Dispensing, Auto-Dispensing, and Sampling. In "Dispensing" mode, the tool functions as a standard repeater. "Auto-Dispensing" allows the tool to learn the user's rhythm and automatically dispense at set intervals, which is ideal for long series. The "Sampling" (or Pipetting) mode allows the tool to function like a traditional sampling tool. This versatility allows a single instrument to cover a wide range of laboratory protocols, from plate filling to complex dilutions.
High-Resolution Digital Interface and User Guidance
The AutoRep E is equipped with a high-resolution liquid crystal display (LCD) that provides clear technical feedback to the operator. The screen shows the selected volume, the number of dispensing steps remaining, and the battery status. The intuitive menu navigation allows for rapid adjustment of parameters. Technically, this interface ensures that the user is always informed of the tool's status, reducing the risk of accidental over-dispensing or running out of battery during a critical experimental procedure.
Ergonomic Design for Repetitive Tasks
Repeatedly dispensing hundreds of samples can lead to hand strain and RSI. The AutoRep E is technically designed with an ergonomic grip and a lightweight chassis to minimize physical stress. Since the dispensing action is triggered by a light press of a button rather than a manual plunger, the force required is minimal. The balanced weight distribution ensures that the tool remains comfortable during prolonged use, maintaining the user's accuracy and performance throughout the entire workday.
Extensive Volume Range and Syringe Compatibility
The AutoRep system is technically compatible with a wide range of syringe sizes, allowing for dispensing volumes from $1\text{ \mu L}$ up to $50\text{ mL}$. This extensive range is achieved through the use of Encode syringe tips, which are available in various formats to suit different precision requirements. Whether the task involves high-precision micro-aliquoting or bulk liquid transfer, the AutoRep E can be configured with the appropriate tip size to ensure optimal fluid dynamics and volumetric accuracy.
Battery Management and Power Reliability
To ensure uninterrupted operation, the AutoRep E is powered by a high-capacity rechargeable battery pack.6 The power management system is technically optimized for long operational periods between charges. The tool can be charged via a stand or directly through a power cord, and it can even be used while charging. This technical flexibility ensures that the instrument is always available for use, avoiding downtime in busy laboratories where high-throughput liquid handling is a daily requirement.
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