Masterclock Keeps You In Sync

Masterclock engineers and builds precise timing and synchronization systems.

Masterclock's time synchronization devices do everything from ensuring smooth programming transitions for broadcasting studios to helping astronauts with timely liftoffs. Since 1994, our product portfolio of master clocks, time servers, count controllers, digital displays, analog clocks, and PC cards have been trusted to support mission critical applications. We constantly improve production methods and focus our engineering talents toward custom solutions utilizing cutting-edge technologies.  With practical experience and extensive knowledge of timing technology, Masterclock can develop an appropriate timing system for any application. 


Masterclock is Global

  • Made in St. Charles, MO USA

  • 2016 Innovators Awards Gold Honoree

  • Winner of 2016 President's "E" Award

  • 2014 Missouri Exporter Of The Year

  • Active customers over 100 countries on 6 continents

  • Open worldwide time & date distribution standards

  • Sync a variety of systems & provide legally traceable time

  • Global daylight savings time compliance

  • Flexible support schedule for overseas customers


Masterclock is Quality

Masterclock synchronization devices are designed and manufactured exclusively in the United States, allowing complete control of manufacturing and design quality.

All Masterclock devices are designed in a robust metal case. A commercial-grade metal housing improves shock and vibration performance while preventing electromagnetic interference. This keeps nearby devices from interfering with clock performance as well preventing the electrical signals within the clock from compromising the performance of other electrical products. 

Masterclock analog clocks only use metal movements. After extensive testing, the life of plastic movements is on average two years, which is unacceptable for a commercial grade product. 

Our digital clocks use Light Emitting Diodes (LED). LEDs offer a life that is hundreds of times greater than LCDs and have larger viewing angles, wider temperature ranges, better shock and vibration performance, improved sunlight readability and do not require back-lighting.

 Commercial-grade components are specified and tested extensively. While more expensive, a product made with commercial-grade parts provides a more reliable product with a longer service life.  Masterclock has committed to this philosophy of quality since 1994.

30-Day Satisfaction Guarantee & 5-Year Limited Warranty

Masterclock offers one of the industry's best warranties.

Under this coverage, Masterclock warrants all electronic hardware products against defects in materials and workmanship for 5 years from the date of sale. Masterclock will also pay for transportation if a product is returned for repairs within the first year. If a customer is dissatisfied for any reason, products may be returned within the first 30 days for a full refund. Click here to learn more.