How to Choose the Right Immunoassay Analyzer for a Small or Medium Laboratory

Selecting an immunoassay analyzer is an important investment for a small or medium laboratory. Buying the highest-throughput system may appear to provide more room for future growth, but excess capacity can increase equipment cost, space requirements, reagent waste, and operational complexity. At the same time, choosing a system that is too small may create bottlenecks as test volume increases.

The most suitable analyzer is therefore not necessarily the fastest instrument. It is the one whose throughput, assay menu, footprint, sample compatibility, automation, and operating model best match the laboratory's actual workload.

Start With the Laboratory Workflow

Before comparing instruments, laboratories should answer several questions:

• How many tests are performed each day?

• Which assays represent the greatest volume?

• Are samples processed continuously or in batches?

• How often are urgent samples received?

• How much bench space is available?

• How many operators use the system?

• Is workload expected to grow?

These questions help laboratories determine what type of analyzer they actually need.

For buyers comparing a chemiluminescence immunoassay analyzer, throughput should be considered together with the entire workflow.

How Much Throughput Does a Small Laboratory Need?

Throughput is often one of the first specifications buyers compare.

However, a laboratory running a modest number of tests every day may gain little from purchasing a system with significantly more capacity than it will use.

The better question is:

Can the analyzer complete normal and peak workloads within the required turnaround time?

For example, Hotgen's MQ60 family provides different configurations intended for different workloads.

Hotgen MQ60 Smart vs MQ60 ProB

These differences show why the best analyzer depends on the laboratory rather than on one specification alone.

When Is a Benchtop Analyzer a Better Choice?

A smaller platform can be appropriate when:

• testing volume is low to moderate;

• laboratory space is limited;

• samples arrive throughout the day;

• assay volumes are distributed across many tests;

• the laboratory does not require large-batch automation.

In these environments, a compact system can sometimes offer a better balance between capacity and cost than a much larger analyzer.

Why Does the Assay Menu Matter?

An analyzer is useful only if it supports the tests the laboratory actually needs.

Before purchasing, laboratories should classify tests into:

High-Volume Tests

Assays performed frequently.

Essential Low-Volume Tests

Tests that must remain available even if demand is limited.

STAT Tests

Tests requiring rapid processing.

Future Tests

Assays likely to become important as the laboratory grows.

A broader CLIA machine ecosystem may be attractive when laboratories want to expand their assay menu over time.

However, local registration status and reagent availability should always be confirmed before purchase.

How Important Is STAT Capability?

Two laboratories may perform the same number of daily tests but have very different operating requirements.

A laboratory that receives urgent specimens throughout the day may require a system capable of prioritizing those samples.

Hotgen lists batch + STAT operation for MQ60 ProB, while MQ60 Smart is positioned around batch testing.

This difference can matter in laboratories supporting emergency or urgent clinical departments.

Why Does Sample Compatibility Matter?

Sample type affects pre-analytical workflow.

Hotgen lists serum, plasma, whole blood, and urine among supported sample types for the MQ60 Smart and ProB platforms.

Broader compatibility can be useful for laboratories serving different clinical departments, although buyers should still confirm the permitted sample type for each assay.

Analyzer-level compatibility does not automatically mean every reagent supports every sample matrix.

What About Reagent Waste?

Reagent waste can significantly influence true testing cost in smaller laboratories.

High-volume laboratories may consume opened reagents quickly.

Smaller facilities may perform certain tests only a few times per week, increasing the risk of unused reagent expiring.

For this reason, laboratories should calculate:

True cost per result = reagent + QC + calibration + consumables + waste + labor + maintenance

This is often a more useful comparison than analyzer purchase price alone.

How Important Is Connectivity?

Manual transcription creates extra work and an additional risk of data-entry errors.

Laboratory connectivity can support:

• automated result transmission;

• patient traceability;

• reduced manual entry;

• improved workflow integration.

When comparing an automatic chemiluminescence immunoassay analyzer, laboratories should therefore evaluate LIS/HIS capability together with throughput and assay menu.

When Should a Laboratory Upgrade to a Larger System?

Higher automation becomes more useful when:

• daily volume increases substantially;

• sample queues become common;

• manual handling becomes a bottleneck;

• staff workload increases;

• current throughput frequently reaches capacity;

• turnaround time begins to suffer.

The right time to upgrade is when the existing workflow limits operational efficiency—not simply when a larger analyzer becomes available.

Should Small Laboratories Also Consider POCT?

A central laboratory analyzer may not solve every urgent-testing requirement.

For selected time-sensitive assays, decentralized testing can complement the main laboratory.

A UPT device, for example, represents a compact quantitative platform that can support selected near-patient testing workflows.

This creates a possible hybrid model:

Central immunoassay analyzer: routine and broader laboratory testing.

POCT platform: selected urgent or decentralized testing.

The two systems can complement rather than replace each other.

A Simple Selection Framework

Choose a smaller analyzer when:

• daily volume is low to moderate;

• space is limited;

• sample arrival is intermittent;

• flexibility matters more than maximum throughput.

Choose a higher-throughput analyzer when:

• workload is growing;

• sample queues occur frequently;

• automation can reduce labor;

• turnaround time is becoming a bottleneck.

Add POCT when:

• selected urgent tests regularly delay decisions;

• testing is required outside the laboratory;

• decentralized testing provides clear clinical value.

The purchase decision should therefore be based on real workflow demand rather than a single technical specification.

Conclusion

The best immunoassay analyzer for a small or medium laboratory is the system that matches actual testing demand without creating unnecessary capacity or operational complexity.

By evaluating throughput, assay menu, STAT capability, sample type, reagent utilization, connectivity, footprint, and future growth together, laboratories can select a platform that is efficient today while still allowing reasonable expansion.

FAQs About Choosing an Immunoassay Analyzer

1. What throughput is suitable for a small laboratory?

There is no universal number. The appropriate throughput depends on daily volume, peak workload, required turnaround time, and how samples arrive throughout the day.

2. What is the most important factor when choosing an immunoassay analyzer?

No single specification should determine the decision. Laboratories should evaluate throughput, assay menu, reagent model, sample compatibility, STAT requirements, footprint, connectivity, support, and total operating cost together.

3. Is a benchtop immunoassay analyzer suitable for a small hospital?

Yes, particularly when test volume is low to moderate, space is limited, and very high throughput is unnecessary. The final choice should still be based on assay availability and actual workload.

4. When should a laboratory upgrade to a higher-throughput analyzer?

An upgrade may be appropriate when sample queues become frequent, the current analyzer regularly reaches capacity, manual workload becomes excessive, or turnaround time begins limiting laboratory efficiency.