Are atomic watches expensive?

G-SHOCK offers entry-level atomic watches at an affordable price. Combined with G-SHOCK shock and water resistance, these watches offer daily accuracy and reliability at entry-level pricing. Start your atomic watch collection with one of these G-SHOCK watches: GW6900-1 : The popular digital 6900 series gives watch wearers a great start towards ultimate accuracy with the GW6900-1 . Multiband 6 atomic timekeeping and Tough Solar charging combine with an iconic style that makes the GW6900-1 a great everyday watch. GWM5610-1 : The shape that started it all, the GWM5610-1 is an introductory-level G-SHOCK square with Multi band 6 atomic timekeeping and Tough Solar. A G-SHOCK atomic watch doesn’t get more classic than the GWM5610-1 square. GW7900B-1 : An atomic watch with a great-looking reverse LCD screen, the GW7900B-1 offers a tide & moon graph, Tough Solar, and an EL backlight. Explore all entry-level G-SHOCK atomic watches .

G-SHOCK MTGB4000 atomic watch denoting style.

MTGB4000
Atomic Watches

Atomic Watch: Radio-Controlled, Self-Setting Watches by CASIO

Discover impeccably accurate timekeeping without the need to adjust your watch. After you select a home city, these atomic watches receive a radio signal closest to the chosen home city from various stations around the world, synchronizing them to an atomic clock.

Explore All CASIO Atomic Watches by Brand

G-SHOCK atomic watches - Some of the most durable watches on the planet.
PRO TREK atomic watches - Built for hiking, trekking, and the outdoors, PRO TREK watches will get you there.
OCEANUS atomic watches - CASIO's line of luxury watches inspired by the sea.

In a world where punctuality and accuracy are of paramount importance, CASIO's line of atomic watches stands out as the best solution. After selecting a home city in range of a radio signal, these self-setting watches are the epitome of reliability, ensuring you never miss a beat.

While living via an atomic watch is the epitome of punctuality and accuracy, living via a CASIO atomic watch backs the newer radio technology responsible for accuracy with the wisdom of over 50 years of CASIO timepiece engineering and craftsmanship. Durability, style, and accuracy are the legacy of a CASIO atomic watch. Let's delve into the basic functionality and accuracy of CASIO atomic watches, also known as radio-controlled watches.

FAQ: Atomic Watches

Atomic watches harness cutting-edge technology to maintain precision. They automatically sync with radio signals synchronized with atomic clocks, such as those from NIST (National Institute of Standards and Technology) in the United States, or similar organizations in different regions.

This synchronization occurs daily and fine-tunes your watch to the most accurate time. A radio-controlled watch is the most accurate description, as an atomic watch must utilize radio reception to receive the timekeeping update on a regular basis. In the event of radio signal loss, the watch still works as a regular timepiece, utilizing long-respected CASIO quartz movements for accuracy.

CASIO goes a step further in delivering accuracy and reliability to an atomic watch by integrating solar technology, ensuring your watch is as reliable as possible. Solar panels in the watch often use Casio’s proprietary Tough Solar technology, delivering reliable energy to the radio antenna. The radio antenna receives the atomic timekeeping signal from a radio station such as station WWVB near Fort Collins, Colorado, keeping your atomic watch both accurate and powered.

CASIO G-SHOCK atomic watches are some of the most durable watches in the world. For over 40 years, G-SHOCK has developed industry-leading shock and water resistance, and that resistance has been used to protect our accurate atomic watches, giving you peace of mind for years to come.

G-SHOCK offers entry-level atomic watches at an affordable price. Combined with G-SHOCK shock and water resistance, these watches offer daily accuracy and reliability at entry-level pricing. Start your atomic watch collection with one of these G-SHOCK watches:

GW6900-1: The popular digital 6900 series gives watch wearers a great start towards ultimate accuracy with the GW6900-1. Multiband 6 atomic timekeeping and Tough Solar charging combine with an iconic style that makes the GW6900-1 a great everyday watch.
GWM5610-1: The shape that started it all, the GWM5610-1 is an introductory-level G-SHOCK square with Multi band 6 atomic timekeeping and Tough Solar. A G-SHOCK atomic watch doesn’t get more classic than the GWM5610-1 square.
GW7900B-1: An atomic watch with a great-looking reverse LCD screen, the GW7900B-1 offers a tide & moon graph, Tough Solar, and an EL backlight.
Explore all entry-level G-SHOCK atomic watches.

The Incredible Accuracy of an Atomic Watch

Radio station clocks such as the clock at station WWVB near Fort Collins, Colorado are synchronized to Coordinated Universal Time (UTC). Station clocks deviate from UTC by only a few tens of nanoseconds, which is negligible for consumers. Radio signals travel at the speed of light but may experience small delays (~10–20 milliseconds) depending on distance and ionospheric reflections. While these delays are tiny, they are still far larger than clock-source error.

Due to transmission effects, noise, and internal processing, synchronization accuracy is typically within about 10–30 milliseconds at the time of update. After synchronization, radio- controlled watches are within ~0.03 seconds of true time.

As long as daily synchronization succeeds, radio-controlled watches remain accurate to under one second, which meets the National Institute of Standards and Technology (NIST) guidelines.

By receiving radio signals transmitted from atomic timekeeping stations, these radio-controlled watches correct their time deviations and maintain timekeeping accuracy to within a fraction of a second between daily synchronizations. This precision is ideal for those who rely on punctuality and time-sensitive tasks.

Whether you're attending an important meeting or catching a flight, you can trust your atomic watch to keep you right on schedule—the epitome of precision.

Their automatic synchronization to radio signals transmitted from atomic clocks ensures unparalleled precision, making them an essential accessory for the modern individual who values punctuality and reliability. Although not technically correct, these radio-controlled watches have become known as "atomic watches" by consumers and watch enthusiasts.