The Test

Our rapid Antigen test for COVID- 19 is the most accurate and trustworthy testing kits available. It aims to provide you with a positive or negative coronavirus result within 15 minutes from the swab being taken. This test is perfect for medical practices, care homes, businesses and education industries.

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How Does It Work?

This test is administered at the point of care, near-patient setting. ie, clinic, surgery, designated administration office in the workplace, aesthetic or dental clinic, home or designated test space.

The Excalibur Rapid Covid test uses a single nostril swab test (nasopharyngeal swab) to collect samples from the nasal cavity.

Once the sample is collected, it is processed using a fluid called extraction buffer. The sample is placed in an extraction tube with approx 4ml of buffer . After just 1 minute, the specimen is placed on an antigen test card, An accurate positive test result can be read from the card in a little as 2 mins. A complete test requires 15 mins to reveal if individual tests positive or negative for SARS-CoV-2 the virus that causes COVID-19.

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Test Procedure

How Does the Coronavirus Rapid Antigen Test Kit Work?


Interpretation of Results

Excalibur launches world-leading antigen test for COVID-19

The new Excalibur Rapid SARS-COV-2 Antigen Test Kit is one of the most accurate and reliable tests of its kind.

No lateral flow antigen test measures very low viral levels, which can only be detected by a PCR test. However, the Excalibur rapid test will miss very few infectious individuals. Kits designed to be applied in specific mass testing environments will be available soon.

The Excalibur Rapid SARS-COV-2 Antigen Test:

  • 100% specificity for SARS-COV-2 with very few false positives observed in tens of thousands of samples tested.
  • Rapid, visual measure of COVID-19 infectiousness reflecting the presence of significant amounts of live virus.
  • 100% sensitivity for high viral loads (equivalent to positive PCR values below Ct=28).
  • Highly contagious sample patients informed within 2-3 minutes, based on visual results.
  • Lower viral load infections detected within 15 minutes.
  • Comprehensively validated in over 12,000 symptomatic and asymptomatic samples and settings.
  • Rigorously tested – following UK Government protocols – by leading university research laboratories, pharmaceutical companies and international hospital groups in China and Korea.
  • Currently in use across Europe in Germany, Italy, Austria, Belgium and the UK by customers including governments, hospitals, care homes, businesses and educational establishments.
  • Excalibur UK and its partner Xiamen Boson are able to manufacture over 2 million kits per day. The test is CE- marked and MHRA-registered in the UK.

The Excalibur Rapid SARS-COV-2 Antigen Test Kit is available for professional use only under the current UK MHRA registration.

For commercial enquiries please contact us at

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Alternatively, test kits can be purchased on-line through our webshop at XP21.co.uk