Turck has announced its high-speed Q25 inductive linear sensor to the automation market. The internal measuring frequency is user selectable and can be as high as 5 kHz resulting in accurate measuring speeds of five metres per second. This high measuring frequency allows the Q25 to provide real-time monitoring and measuring, resulting in more precise control than previously available in other linear measurement systems. The Q25 inductive linear position sensors do not require a magnetic position device and are unaffected by metal debris commonly found in many industrial applications. The sensors provide high resolution and can be used to accurately measure lengths up to one metre.
Sensor operation is based on the RLC (resistance inductance capacitance) principle. Unlike potentiometric or magnetostrictive technologies, the sensors incorporate precisely manufactured printed emitter and receiver coil systems. The emitter coils are activated with a high frequency AC field and produce an inductive RLC circuit with the positioning element. The element is inductively coupled with the receiver coils, which are arranged so different voltages are induced in the coils, depending on the position of the actuator. The voltages serve as a measure for the sensor signal. Q-track sensors deliver maximum measuring spans, with minimal blind zone and high resistance to EMI/RFI noise interference.
The high-speed integrated processor converts the signals into a 25 bit grey code SSI signal which can be accessed via the 8 pin M12 connector. The sensors are compact in design and offered in 10 standard measuring lengths starting at 100 mm with 100 mm increments up to 1000 mm. The unit has extremely short blind zones of only 29 mm on each side, is IP67 rated and operates over the temperature range -25 to 70°C.
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