In 2009, Lathem Time introduced the Lathem AirTime wireless master clock system, and Pyramid Technologies launched its own Pyramid Wireless Master Clock platform. These introductions marked a significant shift in how large facilities could deploy synchronized time without the cost and complexity of wired clock networks.

Wireless master clock systems replaced traditional wired clock-to-clock installations by transmitting time signals over approved radio frequencies. This eliminated the need to run conduit, pull wire, and terminate connections at every clock location, resulting in substantial savings in both labor and materials for new construction and retrofit projects.

Pyramid wireless master clocks are FCC certified, typically do not require licensing, and operate on safe, standard telephone frequency ranges. Both systems allow clocks to synchronize automatically without physical interconnection, reducing installation disruption and ongoing maintenance concerns.

Typical applications for wireless master clock systems include:

• Schools and universities
• Airports and transportation hubs
• Hospitals and healthcare facilities
• Factories and manufacturing plants
• Stadiums and large venues
• Government buildings
• Training centers and convention facilities

In environments like airports, where time awareness is critical and stress levels are high, the lack of clearly visible synchronized clocks is often noticeable. Large-format digital clocks are particularly effective in these spaces, providing instant visual reference for travelers and staff alike.

While both systems provide synchronized time, there are technical differences worth noting:

• Transmission Frequency — Lathem AirTime transmits at 415 MHz, while Pyramid Wireless transmits at 915 MHz.
• Second Hand Motion — Lathem AirTime analog clocks feature a smooth sweeping second hand; Pyramid Wireless analog clocks use a stepped second hand that is visually discreet and inaudible.

Analog wireless receiver clock options include:

• Lathem AirTime: 12-inch and 15-inch analog clocks
• Pyramid Wireless: 12-inch and 17-inch analog clocks

Analog clocks are battery powered and typically use long-life batteries rated for up to five years. No nearby electrical outlet is required, and installation generally involves only wall mounting.

Digital wireless clock options vary by manufacturer:

• Lathem AirTime offers 4-inch red LED digital displays
• Pyramid Wireless offers multiple digital sizes including 2.5-inch, 3-inch, and 4-inch displays
• Pyramid digital clocks are available in red, blue, or green characters on non-reflective black backgrounds

Digital clocks are commonly powered by standard 110 VAC, with 24 VAC options available for certain installations.

Both systems offer extensive mounting and configuration options, including black or silver trim rings, 12-hour or 24-hour formats, surface and ceiling mounts, two-sided brackets, and theft-resistant locking features. Pyramid Wireless clocks also support custom artwork such as logos or full-color graphics on select analog models.

In addition to time synchronization, both Lathem AirTime and Pyramid Wireless master clock systems support bell signaling. Bells can be connected to the master clock receiver to coordinate shift starts, breaks, lunches, and end-of-day events. This capability is especially valuable for crowd control in schools and efficiency in production environments.

Wireless master clock technology introduced in 2009 addressed long-standing installation and maintenance challenges associated with wired systems. Modern deployments continue to benefit from these foundational designs, particularly in large or complex facilities where flexibility and scalability are required.<