Magnasphere Corporation acquisition brings further product expansion and manufacturing capacity for Variohm Group

Variohm Group, part of the sensing and connectivity cluster within LSE-listed discoverIE (LSE: DSCV), continues its strategic product range expansion, manufacturing capacity and application solving capability through the recent acquisition of the Wisconsin – USA based high-performance magnetic switch and sensor manufacturer, Magnasphere Corporation.

Magnasphere’s extensive product range is centred around its patented and unique magnetic switch technology that offers significant advantages over reed and Hall Effect switches and other switch types in terms of fail-safe security, EMI resistance, installation simplicity and cost. Product variants cover security, intrusion detection and access control as well as industrial applications for proximity, tilt, and level sensing in sectors that include Aerospace & Defence, Agriculture, Oil &Gas, Medical, Automotive, Robotics and more.

Magnasphere was founded over twenty years ago, successfully launching its patented high security switching technology as a replacement for security-vulnerable reed switches which are easy to defeat using simple magnets. Whilst competitors had developed expensive and complex alternatives, Magnasphere’s solution offered a cost competitive and defeat resistant solution with similar magnetic field strength, product size and with much improved durability over reed switch-based security contacts. Other advantages included no power source required, and excellent resistance to EMI and surge voltages.

The basic principle behind the Magnasphere high security switch involves a magnetic ball held within a durable, hermetically sealed metal housing. In its open state, the ball contact is attracted to a ferro-magnetic bias on the housing and is drawn magnetically to a contacting ‘closed’ position when a magnet is moved within an activation zone outside of the housing. This also works where the magnetically charged ball is drawn towards a ferrous target – allowing a very low-cost proximity sensor. This principle also forms the basis for Magnasphere’s low jitter, non-mercury tilt switches – an environmentally safe and competitively priced solution. Magnasphere’s technology perfectly suits high security applications, and its cost and durability also makes it a compelling alternative for reed and Hall Effect switches for industrial and commercial OEM applications. A comprehensive range of products are offered including security contacts and switches and these are available in a wide variety of installation configurations and sensing zone alternatives, including recessed and surface mounted variants with single and multiple switch capability. Magnasphere’s products comply with UL -634, Levels 1 and 2 and CE listed equivalents. Magnasphere also markets mart motion detectors based on FMCW radar technology and new MEMS-based perimeter intrusion detection technologies.

Magnasphere’s acquisition brings Variohm Group to nine sensing, switching and motion control manufacturing companies, offering highly differentiated components and systems across almost all areas of industry. With a total staff of more than 500, including 25 engineers, each Group member has a high degree of autonomy but maintains complete access to the Group’s shared expertise and resources – this synergy promises a service and expertise level that is more than the sum of its parts.

As Variohm Group expands with this latest acquisition Graham Pattison, Variohm Group’s managing director, is looking forward to the opportunities offered. “This latest acquisition further reflects Variohm Group’s collected vison and reinforces discoverIE’s continued investment. Now, with an even more diverse range of products and an increased application capability across the Group, we can extend a more progressive and comprehensive service to our valued customers”. Joseph Hedeen, Magnasphere’s general manager is anticipating great things from the increased market opportunities Variohm Group will present. “We are looking forward to working with our new sister companies in the Variohm Group and the cooperation and opportunities on hand from the diversified range of sensing and switching products available”.

Magnasphere joins Variohm Group with fellow USA-based members Control Products Inc., from New Jersey (harsh duty position sensing and switching technologies) and Indiana based Phoenix-America (magnetic encoder and magnetic sensors). UK based companies are Variohm EuroSensor (sensor and transducer supplier and manufacturer), Herga Technology (switching and sensing solutions), Ixthus Instrumentation (specialist measurement systems), Heason Technology (motion control components and custom engineered systems), and Positek Limited (specialised linear and rotary inductive displacement sensor technologies). The German/Hungarian manufacturer Limitor GmbH (temperature control components) completes the line-up. Variohm EuroSensor also has a German subsidiary and Variohm Group products are extensively served by global distributors. For further information on Magnasphere, visit For UK and European sales, email or call +44 (0) 1327 351004.

Article published on: 21/02/2023

Article last updated on: 21/02/2023