4-inch four-digit GPS clock
Clear hours and minutes with uniform 4-inch seven-segment digits. Built for offices, production areas and commercial interiors.
- 4-inch digits
- HH:MM
- Up to 9 m
Precision LED display solutions
Precision time.
Clear information.
Built to last.
GPS-synchronised clocks and industrial LED displays for workplaces, factories and public spaces.
ENGINEERED & ASSEMBLED IN SRI LANKA
TIME SOURCEGPS satelliteDIGIT HEIGHT4 inchesVIEWING DISTANCEUp to 9 m
Live preview · Your local time
HH:MM:SS / 4-INCH SEVEN-SEGMENT GPS CLOCK
GPS synchronisation
Consistent time across your facility.
Serviceable design
Built for dependable everyday operation.
After-sales support
Technical support beyond installation.
Explore our product range
Precision you can see.
Engineering you can trust.
GPS-synchronised clocks and purpose-built industrial systems. Explore the equipment, compare display formats and view the images that matter to your application.
01Seven-segment GPS clocks
Choose uniform digits or a compact seconds display. GPS keeps every model on time.
4-inch six-digit GPS clock
Hours, minutes and seconds in six uniform 4-inch seven-segment digits, automatically synchronised to GPS time.
- 4-inch digits
- HH:MM:SS
- Up to 9 m
3-inch four-digit GPS clock
A compact GPS-synchronised hours-and-minutes display for offices and indoor workspaces.
- 3-inch digits
- HH:MM
- Up to 6 m
3-inch six-digit GPS clock
Six equally sized 3-inch digits show synchronised hours, minutes and seconds. A clear, compact time reference for offices and production areas.
- 3-inch digits
- HH:MM:SS
- GPS sync
3-inch GPS clock · compact seconds
Full hours, minutes and seconds in a compact enclosure. Large hour-and-minute digits pair with smaller seconds digits for a clear, balanced display.
- 3-inch / 1.8-inch digits
- HH:MM:ss
- Up to 6 m
4-inch GPS clock · compact seconds
Prominent 4-inch hours and minutes with compact 2.3-inch seconds. Contrasting colours distinguish the main time from its seconds indication.
- 4-inch / 2.3-inch digits
- Dual-colour display
- Up to 9 m
02Industrial control & scheduled signalling
Coordinate shifts, manage counts and keep production-floor information in clear view.
AstroTM-100
Keep shifts and breaks on schedule. Programmable signalling with an audible alarm and tower warning light.
- 30 schedules
- GPS / master sync
- Audible + visual
Scrap Grader Controller — Transmitter
Manage 12 daily and 12 cumulative counters with a wireless QWERTY keyboard. Works independently or sends updates to the linked overhead display.
- 12 + 12 counters
- LoRa RF
- Keyboard control
Scrap Grader — Overhead Display
A dedicated overhead module for the Scrap Grader Controller. Four green daily counts and four red cumulative counts stay visible, with an alarm and wired operator acknowledgement.
- 4-inch digits
- Daily + cumulative
- Up to 9 m
03Large-format & double-sided clocks
From long viewing distances to opposing directions, choose the format your space needs.
12-inch four-digit GPS clock
High-visibility 12-inch LED digits show GPS-synchronised hours and minutes across factories, warehouses and large indoor spaces.
- 12-inch digits
- HH:MM
- Up to 30 m
12-inch six-digit GPS clock
Clear, synchronised time with red, green and white display options.
- HH:MM:SS
- Up to 30 m
- GPS sync
Double-sided four-digit GPS clock
Accurate time for corridors and production areas, visible from opposing sides.
- 4-inch digits
- Up to 9 m
- Double-sided
Double-sided six-digit GPS clock
Six 4-inch digits on each side bring hours, minutes and seconds into view across corridors and production floors. Suitable for suspended or projecting installation.
- 4-inch digits
- HH:MM:SS
- Double-sided
15-inch GPS wall clock
Extra-large LED digits for factories, warehouses and expansive indoor spaces.
- 15-inch digits
- Up to 40 m
- GPS sync
04Calendar & wireless synchronisation
Bring time, dates and ISO weeks together, or synchronise compatible clocks across a facility.
GPS time & date clock
Show hours and minutes alongside a dedicated day, month and year display. Contrasting colours make each field easy to identify.
- Time + date
- GPS sync
- Up to 9 m
ISO Chrono Vision
A complete time and calendar reference for your workplace.
- Time + date
- ISO week
- GPS sync
ISO week number display
Keep the current ISO week visible across production areas. The built-in GPS receiver automatically calculates week numbers from 01 to 53, displayed on both sides.
- 4-inch digits
- ISO weeks 01–53
- Double-sided
GPS master clock transmitter
Distribute GPS time to compatible slave clocks using a LoRa RF link.
- GPS reference
- LoRa RF
- Master / slave
05Production, safety & material coordination
Make targets, counts, safety milestones and operator requests visible where the work happens.
Wireless production counter
Show three-digit Target and Actual values on both sides of the display. A separate LoRa controller accepts isolated 24 V count inputs and a USB number pad for target entry.
- Target + actual
- Double-sided
- LoRa RF
Wireless target counter
Bring production targets and achieved quantities into clear view.
- Target / actual
- LoRa RF
- Remote control
SafeCount X Pro
Make consecutive safe working days visible, with automatic GPS and RTC daily counting.
- Automatic daily count
- GPS + RTC
- 4-inch digits
Industrial tally counter
Two independent counts for production monitoring, controlled by isolated PLC inputs or a wired remote.
- 24 V PLC inputs
- Up / down count
- Double-sided
Oven status display V2
Keep occupied and idle oven numbers visible using dedicated wireless keypad controllers.
- 6-row display
- LoRa RF
- Double-sided
Raw material request display
Operators select a material code and the overhead display shows its name and production line with an alarm. Two requests can appear together, with an overdue colour indication.
- 192 × 64 matrix
- 99 material records
- Confirmed LoRa RF
06Sports & elapsed-time displays
Continuous pace references and controlled timing for training and production.
4-inch swimming pace clock
A continuous MM:SS reference for pool training. Green 4-inch digits count upward from 00:00 to 99:59, then automatically roll over.
- 4-inch green digits
- 00:00–99:59
- Up to 9 m
12-inch swimming pace clock
A continuous seconds reference for swimmers and coaches. Counts upward from 00 to 59 and repeats.
- 12-inch digits
- 00–59 seconds
- Up to 30 m
3-inch digital stopwatch
Monitor elapsed production time with wired Start, Stop and Reset controls. The display changes automatically from minutes and seconds to hours and minutes after 59:59.
- 3-inch green digits
- Wired remote
- MM:SS → HH:MM
4-inch digital stopwatch
A larger red-digit stopwatch with wired Start, Stop and Reset controls. Locking aviation connectors secure the remote connection, with timing continuing up to 23:59.
- 4-inch red digits
- Wired remote
- Up to 9 m
15-inch digital stopwatch
A prominent timing display for sports and industrial applications, with dedicated Start, Stop and Reset controls.
- Up to 40 m
- Wired remote
- MM:SS → HH:MM
07Desktop rate displays
Clear daily exchange rates, updated from an Android phone.
Desktop forex rate display
Present buying and selling rates for five currencies. Update rates through the dedicated Android Bluetooth app, with custom currency codes, flags and branding available when ordering.
- 5 currency rows
- Android Bluetooth
- Battery-backed RTC
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Engineered and assembled in Sri Lanka
Designed for dependable
everyday operation.
Clear visibility, accurate timing and serviceable construction. Practical display systems for the way your workplace operates.
Meet OptoElectronics.LK ↗GPS-synchronised precision
Automatic time synchronisation for compatible clocks and timing systems.
TCXO-backed timekeeping
Stable timekeeping between synchronisation updates in supported clock models.
Long-term serviceability
Repairable construction and ongoing technical support.
The complete range
Product Catalogue 2026
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