Liquid Handling Robots: A Buying Guide for Facility Managers

Executive buying summary

Liquid handling robots automate repetitive pipetting tasks, increasing throughput and reducing errors in laboratory workflows. These systems are particularly valuable where high-precision dispensing or processing of small volumes is required, such as in diagnostic assay preparation or compound screening. Key decision factors include the required throughput, the range of volumes to be handled, the level of integration with existing systems, and the required level of walk-away automation. Total cost of ownership is influenced by factors such as consumables usage, maintenance frequency, and the need for skilled operators. The biggest risk to avoid is selecting a system that is not appropriately validated for its intended use, potentially compromising data integrity and regulatory compliance.

• Automated liquid handling significantly reduces manual pipetting errors and improves reproducibility of results.
• The choice of robot type should be driven by the specific application and the required level of precision and throughput.
• Thorough validation and qualification are essential to ensure the robot performs reliably and generates accurate data.
• Consider the long-term operational costs, including consumables, maintenance, and potential downtime.
• Integration with laboratory information management systems (LIMS) can streamline workflows and improve data traceability.

Equipment types compared

Key features to look for

• Volume Accuracy and Precision: Ensuring accurate dispensing is critical for reliable results; request performance data and validation reports.
• Throughput and Speed: Consider the required sample processing rate and how this impacts overall laboratory efficiency; ask for cycle time demonstrations.
• Liquid Compatibility: Verify the robot's materials of construction are compatible with the chemicals and biological materials being handled; request a materials compatibility chart.
• Software and Integration: Assess the ease of use and integration capabilities with existing laboratory systems, such as LIMS; request a software demonstration and discuss API options.
• Footprint and Flexibility: Evaluate the physical space requirements and the robot's ability to adapt to changing laboratory needs; request detailed dimensions and modularity information.
• Maintenance and Serviceability: Inquire about preventative maintenance schedules, spare parts availability, and service support options; request a service contract proposal.
• Safety Features: Confirm the robot incorporates appropriate safety measures, such as emergency stops and containment systems; review the risk assessment documentation.
• Data Integrity and Traceability: Ensure the system provides robust data logging and audit trails to meet regulatory requirements; discuss data security protocols.

Pros and cons of each equipment type

Benchtop Pipetting Robot

Pros: Relatively compact footprint, easier to integrate into existing workflows, lower upfront cost.

Cons: Limited throughput compared to larger systems, less flexibility for complex assays.

Modular Liquid Handling System

Pros: Highly flexible and configurable, suitable for a wide range of applications, scalable to meet changing needs.

Cons: Higher upfront cost, requires more space, potentially more complex to operate.

Microplate Handling System

Pros: Optimised for microplate-based assays, high throughput, integrated with other plate handling equipment.

Cons: Limited to microplate formats, may not be suitable for other liquid handling tasks.

High-Throughput Screening (HTS) System

Pros: Extremely high throughput, suitable for drug discovery and compound screening, automated data analysis.

Cons: Very high upfront cost, complex to operate and maintain, requires specialised expertise.

Automated Cell Culture System

Pros: Consistent culture conditions, reduced manual handling, improved data reproducibility.

Cons: Higher upfront cost, requires validation for cell-specific applications, potential for contamination.

Which facilities each type suits

• Benchtop Pipetting Robot: Diagnostic laboratories, research facilities, quality control departments requiring moderate throughput.
• Modular Liquid Handling System: Clinical laboratories, pharmaceutical development, contract research organisations needing flexible automation.
• Microplate Handling System: Immunology labs, genomics facilities, drug screening centres with high-volume microplate assays.
• High-Throughput Screening (HTS) System: Pharmaceutical companies, biotechnology firms, research institutions engaged in large-scale compound screening.
• Automated Cell Culture System: Biopharmaceutical manufacturers, cell therapy facilities, regenerative medicine research centres.

Buyer's checklist

1. Confirm the robot’s performance meets the required volume accuracy and precision specifications.
2. Assess the available space and power requirements at the intended location.
3. Verify compliance with relevant safety standards, including electrical safety (BS EN 61010-1) and EMC (BS EN 61326-1).
4. Develop a comprehensive validation plan to ensure the robot performs as expected in its intended application.
5. Provide adequate training for laboratory personnel on robot operation, maintenance, and troubleshooting.
6. Establish a preventative maintenance schedule and secure a service contract with a qualified provider.
7. Identify and stock critical spare parts to minimise downtime.
8. Consider the robot’s lifecycle and plan for eventual replacement or upgrade.
9. Ensure the robot’s software and data logging capabilities meet regulatory requirements for data integrity (EU GMP Annex 11).
10. Review the supplier’s experience and references in similar applications.