IDEM History

Our journey takes us back to where it started.

ABOUT US (who are IDEM?)

IDEM Safety Switches was created in 2003 by Medi Motasham, the former Head of Research and Development at EJA/Guardmaster. Over 18 years as Technical Director of EJA/Guardmaster, and later Rockwell Automation, he designed and developed the popular Guardmaster Brand Products that included Trojan, Titan, Cadet, Rotacam, Ferrogard, Spartan, Lifeline, Minotaur, etc.

Now IDEM's team, currently with over 200 years' experience between them, have set a new industry standard by offering the "Next Generation" of machine safety interlocks and devices with higher reliability, increased features and up to date durability to cope with the ever-increasing environmental demands placed on machine safety devices.

IDEM's Journey


Medi commences his employment at EJA Engineering, a small local distributor of electrical products based at Hindley Green near Manchester in the United Kingdom


Medi creates the Research and Development Department and designs Trojan, Atlas, Rotacam and the LRS1 Rope Switches.


The Guardmaster brand is established and EJA becomes the largest supplier of safety switches in the UK.


The Guardmaster brand becomes established worldwide with the popular product lines of Trojan, Titan, Ferrogard and LRS4.


Medi is a member of the management buyout team that acquires EJA Engineering Group (comprising of Guardmaster, Sigma Controls and Nelsa).


Rockwell Automation acquires the EJA Group and markets the safety switches as the AB Guardmaster brand globally.


Medi becomes Technical Director of Rockwell Automation, responsible for R&D globally.


Medi Motasham win’s Rockwell Automation’s ODO J. Struger Automation Award for most outstanding contribution in the field of automation.


Medi leaves Rockwell in order to create IDEM Safety Switches with a vision to develop the "Next Generation" of safety switches that will be designed and manufactured in the UK.


IDEM manufactures the first of the "Next Generation" products in a purpose built facility near Manchester in the UK.


IDEM becomes established as the leading developer of "Next Generation" safety switches and interlocks, specialising in products for the Food Industry, Explosion Proof applications and Factory Automation. The new brands of Kobra Tongue, Guardian Line, Idemag, Idecode, Euromag, Hygiemag, Hygiecode, Modus are sold globally.


Rockwell ceases manufacturing at their Rockwell Automation site at Hindley Green, UK. IDEM acquires the site with a vision to set up a World Class Centre of Excellence for the design and manufacture of machine safety devices.


80% of IDEM personnel are ex-Guardmaster Rockwell Automation. IDEM's people are now right back where the journey started.


IDEM are established as the UK's largest manufacturer of machine safety switches and also produce the world's largest range of stainless steel 316 machine safety switches.


IDEM launches the UGB-NET, becoming one of three companies in the world to manufacture a safety gate lock with industrial ethernet (PROFIsafe / CIP Safety).


IDEM win's the prestigious Queen’s Awards for Enterprise: International Trade 2022.


IDEM win's the prestigious King’s Awards for Enterprise: Innovation 2023.


IDEM continue to develop and introduce new switches for the machine safety and automation industry.

Medi Motasham

Managing Director and IDEM Founder. (Former Technical Director EJA / Guardmaster / Rockwell Automation)


The Odo J. Struger Automation Award is an honour bestowed annually on the engineer who has made the most outstanding contribution in the field of automation. The winner of the award for 2000 is Medi Motasham, Director of Research and Development at Guardmaster, UK in the Components and Packaging Group.

Medi, an employee of Rockwell Automation with the acquisition of EJA Ltd. in 1999, was honoured for his contributions to the development of machine safety components.

Having been responsible for the initial set up of the Research and Development department of EJA, Medi initiated the design and invention of the majority of EJA’s Safety Switches and was also responsible for the launch of Trojan, Titan, Atlas, LRS Rope Switches and various other Safety Products which are distributed on a worldwide basis.

His distinguished contribution to the Guardmaster line of safety products culminated in his increased responsibility for the design of Guardmaster, Sigma and Nelsa product lines.

Idem Safety Switches Site Content Guide

This site features the range of Machine Safety Switches from IDEM Safety Switches as the UK’s leading designer and manufacturer of Safety Interlock Switches, Monitoring Devices and Machine Sensors. The site showcases our safety switch innovation and technology with many differing types of switch including Rope Pull Safety Switches, Trapped Key Exchange Systems and Safety Relays.

The range of safety switches includes Coded Magnetic Non Contact Safety Interlock Switches, Magnetic Non Contact Safety Interlock Switches, Mechanical Tongue Safety Interlock Switches, Solenoid Locking Safety Interlock Switches, RFID Coded Safety Interlock Switches, Safety Relays and Safety Sensors all designed here at IDEM Safety Switches. Machine Safety Switches are shown including Guard Switches, Position Switches, Magnetic Switches, Coded Switches, Limit Switches and Belt Alignment Switches.

Please use the contact link to seek information on the full range of Machine Safety Switches, Rope Safety Switches and other Safety Interlock Switch products.

Manufacturers and Designers of Safety Switches – Safety Interlock Switches – Monitoring Devices -Machine Sensors – Rope Safety Switch – Machine Safety Switches – RFID Switches – RFID Switch – Safety Relays – Safety Products – Interlocks – Cat 4/PLe – Cat 3/PLd – Dual Channel – Single Channel – PROFINET – Ethernet/IP – EtherCAT – FSoE.

Ranges include Kobra, Guardian Line, Hygiemag, Hygiecode, Idemag, Idecode, Euromag, Viper, Skorpion, Python and Z range switches.

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