7500E Calculating Atomic Time Clock

Calculating electronic time clock with atomic clock accuracy

Calculates precise totals automatically for employee work hours and jobs

With large clear display, the 7500E electronic time clock provides precise and exact time information using a signal from the WWVB atomic clock in Fort Collins, Colorado. An atomic time clock that automatically calculates worked time between punches and accumulates totals on the card for up to 100 active employees or jobs.

Electronic time clock that auto calculates and more!

The 7500E lets you set pay periods or set job modes for accurate costing information. You can choose to automatically calculate actual or rounded time, and set the time clock to support automatic break deductions from daily totals. The internal lithium battery maintains the time, card totals, and program settings for up to 3 years without power. Optional rechargeable battery keeps unit fully operational for up to 24 hours in case of a power failure.

The most fully automatic atomic employee time clock available

Automatic print-alignment and auto-sensing of front and back of card eliminates operator mistakes. Auto-feed and auto-eject of time cards reduces employee time required to punch in & out. Automatic Daylight Savings Time adjustment makes this atomic time clock virtually maintenance free.

Shop online for accessories

Select from a complete line of accessories for the 7500E time clock. From time cards and time card racks, variety of color ribbon cartridges, to annual hardware support agreements, all that you need to custom fit a Lathem time clock to your business. Order direct from the Lathem online store. Accessories are in stock and available for immediate shipment.

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What customers are saying about this time clock

Good solid reliable product. This is our second Lathem time clock. The old one well outlasted the warranty.

This time clock is awesome!! This time clock is very simple to use for all of our employees. It is accurate.


  • Calculates actual or rounded time
  • Accumulates total worked hours
  • Handles up to 100 active employees or jobs
  • Auto-feed and auto-eject of time cards
  • Optional automatic break deduction from totals
  • Print 12-hour (AM/PM) on 24-hour time
  • Print regular minutes (1/60) or 1/100 of hour
  • Fully automatic print alignment
  • Unlimited punches per day
  • Prints day of week or date
  • Automatic differentiation of the front and back of a double-sided time card
  • Automatic or manual card reset
  • Ability to transfer card totals to another card
  • Wall or table mount
  • Automatic Daylight Savings Time adjustment
  • Built-in lithium backup battery for 3 years of data protection
  • Optional Ni-MH battery backup system providing full operation during power failures
  • Prints English, Spanish or French
  • One year warranty
  • Dimensions: 6.3"W x 5"D x 8"H
  • Weight: 3.3 lbs. Power Consumption: 110-120VAC or 220-240,
  • 50/60Hz, 0.2A
  • Operating Temperature: 23°F - 113°F (-5°C - 45°C)
  • Operating Humidity: 20% - 80% RH, non-condensing
7500E Brochure
7500E Brochure
7500E User's Manual
7500E User's Manual
Nov 08, 2018
4 / 5
Had an older model 10 plus years old that finally died. Lots of hunting for options and we came right back to the Lathem. My only complaint is that it not the last one we had can’t quite line up and print vertically on the card exactly between the lines. Does not effect use, just bugs me, lol. Getting it set the way you want is a bit challenging at first, but manageable. Love the atomic clock feature!
Oct 31, 2018
5 / 5
Works well. No issues.
Aug 16, 2018
5 / 5
I spoke to a very kind sales associate of yours. He was very pleasant and I told him I truly do like Latham’s products. I have used your time clocks and time cards and ink refills for many years now, and I will continue to do business with your company. I have referred many people to try your products, as I know many small business owners in our area. “THANK YOU LATHEM FOR YOUR KINDNESS, SUPPORT WITH ANY ISSUES THAT ARISE, AND THANK YOU FOR YOUR GREAT PRODUCTS!” ...From a very satisfied customer! 😉
Mar 27, 2018
5 / 5
I had an issue with the Lathem time cards that I purchased. I called the company and told them. Within a few days they replaced the defective time cards with new working cards. Problems can happen at any company, a good company knows what to do to fix it and Lathem sure did!
Nov 12, 2018
5 / 5
One of the only time clocks that gives a cumulative total as the employee clocks out. We use it for weekly required study hours on the university level for our athletes. Working great!
Oct 06, 2017
5 / 5
Easy, affordable, reliable
Jan 05, 2017
5 / 5
Our old time clock finally gave up the ghost. This unit was almost the same model as the one we replaced with the added function of the automatic time setting from the Atomic time. It is working like a charm and we are back on track.

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