Wiener Lab CB 350i or HumaStar 300SR - which clinical chemistry system to choose?

Choosing between the HumaStar 300SR and Wiener Lab CB 350i clinical chemistry analyzers hinges on various factors and the specific needs of your laboratory. To determine which option aligns better with your circumstances, it is crucial to consider the following key aspects:

Company HUMAN


Model HumaStar 300SR Lab CB 350i

Throughput max. tests/h

300 330
Reagent positions 40 40
Reagent cooling 13°C below RT Yes
Sample positions 60 52
Sample barcode reader Internal Yes
Cuvettes 80 re-usable Bionex

34 optical glass cuvettes (non disposable)

Water consumption (l/h) < 3 2

* All information is correct as of December 2023




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The efficiency of clinical chemistry analyzers is paramount for laboratories dealing with diverse sample volumes. Opting for a high-throughput analyzer is imperative in high-volume testing environments, ensuring that the laboratory's testing needs are met without bottlenecks or underutilization. Matching the throughput capacity to the laboratory's specific requirements is pivotal for optimal performance.

  • HumaStar 300SR: Demonstrating a robust maximum throughput of 300 tests per hour, the HumaStar 300SR excels in high-volume testing environments.
  • Wiener Lab CB 350i: Offers a slightly higher maximum throughput of 330 tests per hour, making it suitable for laboratories with varying sample volumes, including those with moderately high testing demands.

Reagent Positions

The availability of reagent positions plays a pivotal role in supporting laboratories conducting a wide array of tests. A higher number of positions not only facilitates greater test flexibility but also diminishes the necessity for frequent reagent changes. This feature is particularly crucial for laboratories seeking efficiency and versatility in their testing processes.

  • HumaStar 300SR: With 40 reagent positions, the HumaStar 300SR provides versatility in conducting a diverse range of tests, minimizing the need for frequent reagent changes.
  • Wiener Lab CB 350i: Equally equipped with 40 reagent positions, allowing flexibility in test variety and reducing the frequency of necessary reagent changes.

Reagent cooling

The stability of reagents is foundational for the precision of clinical tests. Employing reagent cooling mechanisms becomes indispensable, particularly for tests sensitive to temperature fluctuations. Maintaining reagents within specific temperature ranges ensures their integrity, contributing to accurate and reliable test results.

  • HumaStar 300SR: Ensures stable reagent temperatures at 13°C below room temperature, providing an optimal environment for preserving reagent integrity.
  • Wiener Lab CB 350i: Incorporates reagent cooling, contributing to stable reagent conditions for accurate and reliable test results.

Sample Positions

Strategic sample positioning is indispensable for laboratories managing varying sample volumes. Ensuring an adequate number of sample positions is essential to efficiently process all patient samples, mitigating the risk of sample backlogs and maintaining operational fluidity.

  • HumaStar 300SR: Boasting a larger sample capacity of 60 positions, the HumaStar 300SR is well-suited for laboratories managing higher sample volumes.
  • Wiener Lab CB 350i: Provides 52 sample positions, offering efficiency for labs with moderate sample volumes.

Sample Barcode Reader

Elevating the integrity of the testing process is achieved through the integration of sample barcode readers. These readers reduce the risk of sample mix-ups and ensure accurate linkage of results to the corresponding patients. This feature is particularly critical for clinical laboratories handling high sample throughputs, enhancing overall testing accuracy and reliability.

  • HumaStar 300SR: Equipped with an internal sample barcode reader, the HumaStar 300SR enhances the accuracy of sample identification.
  • Wiener Lab CB 350i: Features a sample barcode reader, providing an additional layer of accuracy and traceability to the testing process.


The type and capacity of cuvettes employed in clinical chemistry analyzers significantly impact consumable costs, the number of tests conducted before cuvette replacement, and the overall environmental footprint. A nuanced understanding of cuvette configuration is pivotal for making informed decisions that balance cost-effectiveness and operational efficiency.

  • HumaStar 300SR: Utilizes 80 re-usable Bionex cuvettes, contributing to a larger cuvette capacity and cost-effective operational practices.
  • Wiener Lab CB 350i: Utilizes 34 optical glass cuvettes (non-disposable), offering a different cuvette type that might impact cost considerations.

Water Consumption

Monitoring water consumption emerges as a key aspect of responsible laboratory management. Controlling operating costs and minimizing environmental impact are achieved through strategies that reduce water consumption. Implementing measures to lower water consumption not only results in cost savings but also aligns with sustainability efforts in the laboratory, contributing to a more environmentally conscious operation.

  • HumaStar 300SR: Boasts a lower water consumption rate of less than 3 liters per hour, contributing to cost efficiency and environmental sustainability.
  • Wiener Lab CB 350i: Demonstrates a low water consumption rate of 2 liters per hour, enhancing operational cost efficiency.


  • HumaStar 300SR: Recognized for its high sample capacity, cost-effective use of re-usable Bionex cuvettes, and environmental sustainability focus.
  • Wiener Lab CB 350i: Offers a slightly higher throughput, includes a sample barcode reader, and features non-disposable optical glass cuvettes, potentially impacting consumable costs.

In conclusion, the choice between the HumaStar 300SR and Wiener Lab CB 350i should be based on the specific priorities and requirements of your laboratory. Considerations include testing volume, the range of tests needed, water consumption, and the importance of features like sample barcode readers in your testing processes. The additional information provides insights into the specific strengths of each analyzer, facilitating a well-informed decision based on your laboratory's unique needs.