THE Magnasphere switch represents the first significant improvement in magnetic switch and sensor technology since the introduction of the reedswitch in the 1950s.
Available from Koloona Industries , this new technology overcomes the inherent weaknesses of the reed switch (fragility, tamper susceptibility, size), while retaining the beneficial characteristics (non-contact actuation, sealed contacts) and provides additional application capabilities (ferrous proximity sensing, non-mercury tilt and tamper sensing).
The simplicity of the Magnasphere switch rivals the straightforward design of the reed switch, however, the switch's design yields superior performance in a wide number of applications.
The basis of the technology is a magnetic sphere, or ball contact. The sphere is housed in a durable metal housing. Completing the switch is a seal that contains the contacting electrode, insulated from the magnetic perimeter by a ceramic to metal bond.
The case or seal provides the second contact point required to complete the electrical circuit.
The seal/electrode cap is welded to the housing in an inert atmosphere providing an hermetically sealed contact. Post-assembly magnetising activates the magnetic properties of the contact.