Manual sedimentation tests depend on a technician reading each tube by eye. This explains how an Fison Erythrocyte Sedimentation Rate Analyzer automates that reading, the benefits it offers over manual methods, and what to check before choosing one.
How Manual Sedimentation Testing Works
In both the Westergren and Wintrobe methods, anticoagulated blood stands in an upright tube while red cells settle below a layer of clear plasma. After a set time, a technician reads by eye how far the cells have fallen against a marked scale. Westergren uses a longer tube, while Wintrobe uses a shorter one, but each depends on careful handling and a visual reading for one tube at a time.
An Erythrocyte Sedimentation Rate Analyzer replaces that visual reading with infrared detection. The Erythrocyte Sedimentation Rate Analyzer follows an improved Westergren method and reports a Westergren ESR value in millimeters per hour, turning a manual routine into Automated ESR Testing for many samples at once.
How Automated Reading Follows the Settling Boundary
The Automated ESR Analyzer principle centers on the boundary between settling red cells and the plasma above them. An infrared sensor scans each tube at a fixed sampling interval of a few minutes and records the height of that boundary as it falls.
Infrared Detection
Repeated infrared scans track the boundary through the whole test, then the analyzer reports the result as a Westergren value.
Thermal Compensation
Blood properties change with temperature, so the analyzer corrects each result automatically to a fixed reference temperature.
This ESR Analyzer working principle accepts samples across a wide hematocrit range and a set blood level range in the tube, with fine reading accuracy at each scan.
Eight Advantages Over Manual Methods
Compared with manual Westergren and Wintrobe testing, automated sed rate analyzers change daily ESR work in these ways.
No Reading by Eye
Infrared detection replaces the visual reading, so results no longer depend on judging a scale.
Half-Hour Mode
Alongside the one-hour test, a half-hour mode delivers results sooner.
Dozens of Positions
Dozens of tubes run side by side instead of one reading at a time.
Readings Through the Test
Scans at regular intervals follow the boundary throughout, not only at the end.
Temperature Corrected
Automatic correction to a reference temperature keeps results comparable.
Less Cross-Contamination
The improved Westergren method helps prevent cross-contamination between samples.
Saved and Printed Results
Results save automatically, and a built-in thermal printer produces a report.
Touch Screen and Data Output
A color touch screen and serial interface simplify setup and data transfer.
ESR Analyzer Uses in Hospitals and Clinical Labs
ESR Analyzer uses cover the screening of infections, inflammatory and autoimmune disorders, disease progression monitoring, and routine health analysis in hospitals, clinical laboratories, and research centers.
Infection Screening
A raised ESR supports the screening and diagnosis of infections. As one of several erythrocyte sedimentation rate analyzer blood tests, it points to inflammation rather than the cause, so an erythrocyte sedimentation rate analyzer bacteria finding still needs further testing.
Inflammatory Disorders
Hospitals use the erythrocyte sedimentation rate analyzer to screen and diagnose inflammatory disorders.
Autoimmune Disorders
Clinical laboratories run ESR when screening for autoimmune disorders and following disease progression.
Routine Health Analysis
Research centers and clinical laboratories include ESR in routine health analysis.
ESR often appears on the same request as a blood count, but the two answer different questions. An erythrocyte sedimentation rate analyzer blood count mix-up is common: the analyzer measures settling speed, not the number of cells. The range of ESR analyzers shows how each sed rate analyzer compares.
Westergren, Wintrobe, and Automated ESR Compared
| Factor | Manual Westergren | Manual Wintrobe | ESR Analyzer |
|---|---|---|---|
| Tube | Long tube | Short tube | Improved Westergren tube |
| Reading | By eye | By eye | Infrared scans |
| Test length | One hour | One hour | Half-hour or one-hour mode |
| Temperature effects | Not corrected | Not corrected | Automatically corrected |
| Records | Handwritten | Handwritten | Auto-saved and printed |
Common Selection Mistakes to Avoid
Ignoring Sample Limits
Check the hematocrit range and blood level range the erythrocyte sedimentation rate analyzer accepts before changing your collection routine.
Underestimating Capacity
Match tube positions and tests per hour to your busiest periods, not your average day.
Overlooking Test Modes
Confirm both half-hour and one-hour modes are available if your clinicians use both.
Assuming Network Connectivity
Data leaves through a serial interface. Confirm how results will reach your lab information system.
Exploring the ESR Analyzer Category
ESR Analyzers sit alongside hematology analyzers and coagulation analyzers in the hematology lab. Clinical laboratories and research centers comparing options usually weigh detection method, tube positions, tests per hour, test modes, temperature correction, and data output.
Whether you are replacing Westergren racks or Wintrobe tubes, you can review the full Erythrocyte Sedimentation Rate Analyzer lineup to compare options, or browse other laboratory instruments on the Fison home page.
See Automated ESR Testing in Detail
Compare tube positions, test modes, and temperature correction.
Explore ESR Analyzers
