Simplex (6310-9221) 12″ Round Replacement Synchronized Clock


SKU: 6310-9221

(Wired, Surface 120vac, 3 watt, .028 amps, 3WBLK)

5 – 7 BUSINESS Day lead time to ship 

Simplex 12″ Synchronized Clock : Model# 6310-9221

(Wired, Round, Surface Mount 3WBLK)

Timing is everything, and at Life Safety Consultants, we know that. We also know that having properly running clocks in your hospital, airport or school is significant to running a successful operation (sometimes literally, as these replacement clocks are vital for timing operations, procedures in the ICU, etc.) These hospital, school and airport replacement clocks are synced to the Simplex Time Control Center for accurate timing with both hourly and 12-hour correction.

Simplex Synchronous Clocks can be used in all types of applications, from small offices to large-scale industrial sites. 

Optional Dial Styles: (Downloads in Specs & PDFs Tab)

Replacement clock w/ solid-state circuit board movement –  3 year warranty

Each synchronous clock uses a sweep second hand, and provides these capabilities:

Hourly correction. Clocks are automatically synchronized with the Simplex Time Control Center every hour. This means clocks will display the correct system time after less than 59 minutes of power failure. Clocks that are up to 59 minutes slow or 55 seconds fast are corrected completely on the hour.

12-hour correction. Synchronization is provided for clocks that are up to 12 hours slow. This ensures that even the most prolonged power interruption in individual clocks, or in the complete system, will be compensated for automatically. Clocks that are up to 11 hours and 59 minutes slow are corrected every 12 hours.

If you should have any questions regarding the Simplex replacement clocks, please call us at (888) 557-0558, or email us at


Additional information

Weight 3 lbs
Dimensions 12 × 12 × 4 in


Part Type

Clocks, Mount, Round, Surface, Sync, Wired



Simplex 12″ Synchronized Clock : Model# 6310-9221






Optional Dial Styles : Replacement clock w/ solid-state circuit board movement –  3 year warranty