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Posital Fraba
Posital Fraba designs and markets sensors for high precision industrial angle and displacement detection applications. They take encoder manufacturing to the next step by offering 24h production for most absolute and incremental encoders. This is why POSITAL is a one-stop encoder shop.
This 24h expedited production is possible due to POSITAL's mass customization approach. Customers have access to over one million encoders. When a customer places an order, POSITAL quickly builds and calibrates the unit from existing sub-assemblies. You can reference the product specific datasheet available on POSITAL.com to find specifications, product manuals, mechanical drawings and more.
For those orders which don't require the expedited production, POSITAL's standard production is typically 72 hours. POSITAL also offers a wide range of inclinometers and linear sensors and produced in a similar fashion. As a Posital Fraba distributor, Electromate supplies a wide range of Posital Fraba encoders & inclinometers among other products. You can browse our selection below or contact us for additional assistance.
Wiegand Effect
Posital's rotary encoders implement Wiegand technology. The “Wiegand effect” is a physical phenomenon discovered in the 1970’s by John Wiegand. Wiegand found that when a specially prepared piece of ferromagnetic alloy (the Wiegand wire) is subject to a reversing external magnetic field, it will retain its magnetic polarity up to a certain point, then suddenly ‘flip’ to the opposite polarity. This change in magnetic polarity takes place within a few microseconds. This sudden change of magnetic polarity can generate a pulse of current in a copper coil positioned close to the Wiegand wire. POSITAL’s Wiegand sensors offer bipolar magnetic sensing without the need for any external voltage or current to be applied. The material properties of the sensor mean that consistent pulses are produced every time the magnetic field polarity switches. This makes it the perfect magnetic sensor for low-power and energy-saving applications.
Pulse Energy Harvesting
The consistency of the pulses produced by Wiegand sensors can also be used to provide energy for ultra-low power electronics to be operated using a single pulse. In addition, successive pulses to be stored to offset energy demand of low-power energy circuits. Alternatively, the pulses can be used to trigger, or ‘wake-up’, intermittently powered electronic circuits. It is also possible for applications to exploit both functions of the pulses (magnetic sensing and energy harnessing), using the pulse energy to power ultra-low power circuits which use the timing of the pulses to perform tasks (e.g. count event data).
