Electricity and Control February 2022

SENSORS + SWITCHES

object detection. Pepperl+Fuchs offers object detection sensors with Ex-d enclosures. A powerful light source in the sensor emits short pulses that are reflected by the target object and captured by a precise, light-sensitive receiver element. The internal sensor electronics use the runtime of the light pulse to calculate the distance to the target object. This technology is used in the manufacturing of hoses and flexible pipes for oil production. The sensors from the VDM28 series have a detection range of up to 50 m. They monitor prescribed locations in the hazardous area and record the amount of material in stock. If a defined marker is understocked at a location, the sensor signal triggers automatic processes for refilling stock or ordering materials. Inclination measurement and code reading Inclination sensors are typically used in tunnel drilling systems to monitor the inclination of the drilling arms. A 360° check detects any errors in the propulsion system. Sensors from the INX360 series in pressure-resistant enclosures are used in these applications. The measurement results are not affected by the inevitable speed changes of the tunnel drill. The error-free inclination detection in this dynamic application enables precise alignment of the drill. Stationary readers, such as those from the OPC120 series, read 1-D Turck Banner has expanded its T30R series of radar sen- sors with a wider-angle (45°×45°) beam pattern sensor to better detect curved or reflective surfaces and larger targets. Radar sensors are often the best choice for out- door or dirty applications because their signals are not affected by wind, sun, rain, snow, fog, or air temperature. With a 45°×45° beam pattern, the T30R-4545 sen- sor provides coverage of larger areas and more robust detection of irregular surfaces or targets presented at steeper angles. The sensor uses two independent, ad- justable sensing zones and operates at 122 GHz, which enables higher-precision measurements at distances of up to 15 m. It can also detect objects as close as 150 mm and with linearity and repeatability less than ±1 cm. It offers dual discrete outputs for slow and stop positions, or analogue and IO-Link for absolute measurement val- ues. Additionally, the Pulse Pro I/O output is available for seamless integration with Banner lights, providing direct process feedback that requires only power – no control- ler is needed. While rain, snow, fog, sunlight and air temperature have the potential to interfere with accuracy in photoelec- tric and ultrasonic sensors, the T30R series uses FMCW radar detection to deliver dependable performance in any type of weather. Additionally, the best-in-class T30R series features rugged IP67 housings, protecting the electronic components from moisture and dust. Wide beam radar sensor

At a glance  Sensors originally developed for use in discrete manufacturing applications can be adapted for use in process industries.  A laser scanner developed to provide collision protection on tanker filling platforms, for example, can be adapted for use in Ex zones.  RFID sensors, widely used to monitor and control access to security areas can be adapted for use in process industries and hazardous areas. and 2-D codes quickly and reliably in hazardous areas. The devices are reliable even on reflective surfaces. There are many other case studies that could be presented. Pepperl+Fuchs offers application-specific solutions and ready-to-use standard products. Equipped with a pressure-tight encapsulated (flameproof) enclosure, the sensors can capture different process-related variables and provide the information basis for their automation. A wide range of standardised and certified sensors are approved for zones 1/21 and 2/22. Explosion-protected IQH and IUH read/write heads and VLM350 laser light sectional sensors are also available, in addition to those noted. □

For more information visit: www.pepperl-fuchs.com

SENSORS + SWITCHES : PRODUCTS + SERVICES

Left: The T30R-4545 sensor. Right: The sensor can be used outdoors, in loading docks, for example, to prevent trucks colliding with docking stations.

Applications The wide beam radar sensor can be used for:

- Target detection of moving and stationary objects - Collision avoidance, on board heavy equipment such as reach stackers, forklifts and mining vehicles - Detection in harsh outdoor applications - Fill-level applications in tanks - Detecting object presence/absence within a de- fined zone - Vehicle detection in carwash, drive-through, or loading docks.

For more information contact Brandon Topham at Turck Banner. Tel: +27 (0)11 453 2468 Email: brandon.topham@turckbanner.co.za Visit: www.turckbanner.co.za

FEBRUARY 2022 Electricity + Control

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