EM library solutions

What is electromagnetic (EM) security technology?

Electromagnetic (EM) security technology has been used in the library for a number of decades for the protection of valuable library collections. It still is the ultimate theft protection technology. The security labels are equipped with special magnetic materials that respond to low-frequency magnetic fields generated by security systems at the exit of the library. The EM labels can be activated or deactivated with special equipment or a self-service kiosk. A properly deactivated item does not trigger the alarm at the EM security port. Whereas if the item is not deactivated, an alarm will sound at the exit of the library.

Aluminum shielded bags (such as iso-bags for deep-frozen foods) are often used with the intention of shielding the security labels so that they can no longer cause an alarm; here, unlike RFID, EM is insensitive to this. RFID is a technology that is mainly used for the automated administrative processing of loans, renew

Sapphire RFID self service
Diamond EM Premium library solution

Why choose EM in library systems?

EM technology offers unique security for two reasons: (1) the EM labels are invisible, they are hidden in the spine of a book or between the pages, and (2) it is almost impossible to shield the signal from the EM labels. Because of the fact that EM labels are so difficult to shield and difficult to remove, conventional shoplifting- and shielding methods as described above cannot be used to steal items.

The EM security systems of Dialoc ID Products detect most EM labels from competitors and have been installed for 30 years worldwide. Our own EM label production guarantees constant and guaranteed quality and compatibility. Guarantees that in practice ensure the highest detection capability, the lowest failures and false alarms, and optimum durability.

All security gates of Dialoc ID are characterized by the same elegant appearance combined with the high quality of workmanship, choice of materials and durability. The gates are suitable for multiple installations because they are easy to interconnect without interfering to each other. One practical option is the integrated customer counter and the possibility to read data locally and/or collect data (such as number of visitors and alarms) in the cloud.

What type of libraries use EM solutions?

The EM technology is particularly interesting for:

  • Academic, university or special knowledge libraries
  • Unique Libraries with rare and very valuable items that are usually not on loan
  • Libraries with high standards about the security of their collection

Our EM solutions for your library:

In addition to electromagnetic systems, Dialoc ID Products also offers systems with RFID and hybrid technology.

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Find out more about our Library Solutions.

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Dialoc ID has its head office in Harderwijk, the Netherlands with partners in Europe, North- and South America, Asia, Australia and Africa.

Dialoc ID is a leading manufacturer of innovative library solutions using EM (electromagnetic), RFID (Radio Frequency Identification) and Hybrid (EM & RFID) technology.


The Dialoc ID products are sold, installed and serviced through our network of official partners located worldwide.

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- Electromagnetic (EM)
- Hybrid (EM/RFID)


Dialoc ID Products B.V.
Daltonstraat 42
3846 BX  Harderwijk
The Netherlands
T +31 (0) 341-422760

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We will be closed for the Christmasholidays from December 24, 2023 to
January 2, 2024.

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