Atomic clocks from the NPL are recognized as the most accurate in the world

Recently, atomic clocks installed in the National Physical Laboratory of the United Kingdom (National Physical Laboratory, NPL) were recognized as the most accurate clocks in the world. It is worth noting that the National Physical Laboratory was founded in 1900, and it is located near London. The cesium clock NPL-CsF2 is currently used as a standard for testing International Atomic Time and Coordinated Universal Time.

This watch received the honorary title of “the most accurate watch in the world” from the magazine Metrology, owned by the International Bureau of Weights and Measures. The audit showed that this watch could be behind or go ahead one second in 138 million years. This is unprecedented accuracy, no other watches in the world are able to count down time with such accuracy. Cesium clocks are among the most accurate in the world, and the NPL-CsF2 model, as we see, is the most accurate in the world.
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The specialists who developed these watches were able to achieve similar accuracy as a result of reducing the influence of several main sources of measurement error. The main sources of error are the Doppler effect and frequency variation. The time measurement error of this clock is thus reduced to a value of 2.3 × 10–16.

In the United States, by the way, there is a cesium clock, which is capable of counting time with an accuracy of up to 3 x 10-16, but, as we see, the English clock is more accurate.

Via CNET