Advance Automation Co

Advance Automation Co

3526 N Elston Ave, Chicago, IL 60618, United States

Series LS

Series LS

-Originators of Magno Reed Limit Switches-Indicator Light Feature

Material And Design Specifications

As an industry pioneer, Advance Automation was the first company to utilize reed switch technology in conjunction with a cylinder. Today, the company offers six different magno reed switch models:

-LS10A - Original model; low profile; light duty applications-LS10 - Light duty applications-LS20 - Triac; A.C. only; heavy duty applications-LS30 - Utilize as NO and NC; light duty applications-LS11 - Green L.E.D. indicator light; light duty applications-LS21 - Triac; A.C. only; orange neon indicator light; heavy duty applications

Light duty applications include programmable logic controllers and computers. Heavy duty applications include devices such as solenoid valves, contactors, and lamp loads exceeding 10 watts.

Reed Switch

Switch Description

The aluminum switch housing contains a reed device, which consists of two overlapping reed blades of a ferromagnetic material. These blades are supported in a hermetically sealed glass tube and encased in epoxy resin in the housing. Each reed blade connects to its own exterior wire lead.

Switch Actuation

All the reed switches that Advance Automation offers operate in the same manner. The groove on the piston is machined deeper to accept a magnet strip. The switch actuates when the magnet on the piston passes under the reed device. Because the reeds are ferromagnetic, the opposite ends assume opposite magnetic polarity when brought within the influence of a magnetic field. The reed blades will then do one of two things:1.Close (NO - normally open switch)2.Open (NC - normally closed switch)

Switch Applications

Use it for automatic cylinder cycling, light indication, cylinder programming and sequencing, trip timers and counters, multi-position signaling, and many other applications. A switch may be connected to a programmable logic controller, a PC, or a relay. The operation of the switch can be repeated millions of times at extremely high speeds. The mechanical life of a switch is 10 to 100 million cycles. The electrical life of a switch, when used within the recommended guidelines, exceeds 2 million operations.

Switch Ratings

Do Not Exceed Switch Rating.

If you are not sure of your circuitry current ratings,we recommend you use the LS20.


Limit switches can be destroyed by a very brief contact across line voltage, such as brushing a wire against conduit. DO NOT CONNECT WITH A LIVE CIRCUIT. Turn on power only after you are certain that the switch is connected in series with a properly rated load.

Switch Testing

All switches have been factory tested. If field testing is desired, the testing device must coincide with all switch data to prevent switch failures due to testing.

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