Lathem Sonachron Workshift Timer

The original electronic manufacturing bell timer. Unique manual ring setting counts 10 to 15 minutes then rings again. Read more, below. New, two year guarantee.

Our Price: $979.00

Wire and Program - Yes or No
Do you want us to do the work?

Accessories & Supplies:

DetailsIDProduct NameDescriptionPriceAdd To Cart
Click 56 Low Voltage DC Strobe LightLow Voltage DC Strobe Light$74.00
Click 115 Surge ProtectorPower damages are not covered w/o surge protection$14.95
Click 78 Amber Strobe Light 110VacHigh Voltage Amber Strobe Light$74.99
Click 88 6" 110V AC Bell 96-102dB6" 110V AC bell$99.00
Click 86 4" 110V AC Buzzer 102db4" 110V AC Indoor Buzzer$139.00
Click 407 25' Insulated bell wire25' Insulated bell wire$19.95
Click 404 50' Insulated bell wire50' Insulated bell wire$29.50
Click 405 100' Insulated bell wire100' Insulated bell wire$34.50
Click 413 250' Insulated bell wire250' Insulated bell wire$79.00
Click 195 Lathem Sonachron BatteryLathem Sonachron Replacement Battery$45.00


Lathem Sonachron DWA-S Workshift Clock and Bell Timer
Rings bells, rings buzzers.

We have installed well over 200 of these ourselves.
If you are going to tackle this, you should call us.
Experience Matters.

Download our schedule worksheet,  Fax or email it to us  <<  Click on this line
See our repair shop, circa 2003       2003!  << Click on this line

The Lathem Sonachron is a dual-purpose, single-circuit program ideal for signaling horns and bells.

  • Ask for our “Cliff-Notes“ version of the owners manual.
  • We can also pre-wire and set this up (program it) for you.  Then it's just plug and play.
  • Password Protected keypanel, easy to program or change the schedule.
  • Weekly schedule, up to 1440 soundings, spread over 7 days.
    Up to 72 different times (rings) in a 24 hour period.
  • Signal Duration:  1 to 99 seconds.  One setting for all bell events.  Example: 5 seconds.
  • Unique variable Break and Lunch timers - press it, it rings again in 10-30 minutes
  • Holds memory and current time for up to 30 days during power outages.
  • Automatically adjusts for daylight savings (on or off).
  • Quartz timer accuracy, has an internal mechanical 10-amp relay.
  • For an alternative, check out the Pyramid 7000 timer, it does more
    - Click on any one of the three images below for other options.

     Pyramid 7000              Pyramid Bells In A Box - Digital.jpg           

Call us if you have questions, as we install these machines.
Work with experienced people.

Yep.  We installed this one...

An actual Lathem Sonachron Workshift Timer
in a metal fab shop - we set this up

This is the Lathem Sonachron clock and timer, with the Amano CP5000 time recorder

This is a typical order:
Lathem Sonachron, two bells or buzzers, bell wire, and strobe lights

This has been going on for years: 
People keep asking "How loud are your bells?"

Unfortunately, it's like describing a dinner at a restaurant. It depends on the environment.  Is it an empty room like a gymnasium?  Does it have lots of rooms, or lots of background noise like a woodworking shop?  Is this a warehouse with lots of rows of shelving and boxes of fabric?  Will this be outside?

Bells and buzzers all seem to max out at 102db.  102db is very loud.
110db is extremely loud.  Painfully loud.  Ear-ringing loud.

In our experience, installing 2 to 3 bells or buzzers is much more effective than just one.   Put one by the timer, then run wire out the another, half-way across the building, or 100'.  It won't be louder, it will just be more likely to be heard above all the background noise.

So, yours truly did some research recently (2016), this is interesting:
Using an Android phone decibel app, this is what we found:
**A bedroom at night in the country, windows closed:  28 - 32 db
**A bedroom at night in the city with the windows closed:  42- 46 db
**Office environment, people chattering:  62db

**American Airlines 737 inside just behind the wing,
    where you can see the engine: during takeoff  86db
**Same jet, landing with the reverse thrusters on:  88db  That ROAR you hear..
**Same jet, cruising for 3 hours, it's 82 to 86db.  That's partially why flying is tiring.
Shop buzzer's:  102db (Edwards, the ones we sell)  Other brands "hum" at 82 to 86.
Our bells test out at 98 to 103db depending on voltage   When you fly, put napkins in your ears, you will arrive much less "buzzed."

It seems that no one offers anything louder than 102db, unless it goes on a train, ocean liner, or fog horn.  In some cases loudspeakers are used on farms; we don't have them, but our equipment will ring them.  This is 110db, a train horn on an obnoxious person's pickup truck.  In a working environment, this would clearly cause accidents.

More bells or horns does not make it louder, it just makes it more pervasive - easier to hear through the machinery, across the rooms, over the land.

July 5, 2018 more to know: 
A Fire Station Siren is 106 decibals. Our bells and buzzers are typically 98 to 102.