Novotechnik TFD-4000 series short-stroke touchless transducers

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Novotechnik TFD-4000 series short-stroke touchless transducersNovotechnik’s TFD-4000 series short-stroke linear transducers are a useful and economic option where minimal size, high environmental protection, very long life and high reliability are key factors for medium to high-volume OEM position control applications. Available from Variohm EuroSensor, they feature single or optionally redundant ratiometric output; a typical repeatability of +/- 0.1 per cent FS; a measurement range of 5 to 50mm; and 12-bit resolution.

Based on Novotechnik’s well-proven RFD-4000 rotary sensor, the two-part non-contacting assembly comprises Hall sensor electronics – encapsulated and fully potted in a compact housing – and a separate magnet. The housing protection class options are IP67, IP68 or IP69K. With nominal dimensions of only 40mm × 27mm and a flat profile of just 7mm, the sensor can be discretely assembled on the moving or stationary side of the measurement platform and the tiny magnet easily embedded within the opposite platform for a very low-profile measurement device. Two standard magnets options are available to provide 14mm or 24mm stroke lengths.

The encapsulated design and touchless Hall Effect technology used on the TFD-4000 offers extreme durability with exceptionally high shock and vibration ratings, as well as a mechanically unlimited life. A temperature rating of -40 ... +125degC and full EMC compatibility will satisfy a wide range of applications from industrial controls to mobile machinery where short-stroke position measurement or where linear movement verification is required. The sensor is available with a choice of single, partly- and fully-redundant (c/w rising) ratiometric output from a 0…5V DC supply. The update rate is 2.5kHz and the standard model is supplied with 0.5m long leadwires.

Customisation options for volume applications include special output characteristics such as trapeze or parabolic profiles and a wide choice of connector options.

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