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PRODUCTS SENSORS & SENSING SYSTEMS


MORE THAN HF: NEW READ/WRITE DEVICES COMBINE THE BENEFITS OF HIGH-FREQUENCY RFID WITH UNIQUE READ RANGE CAPABILITIES


Pepperl+Fuchs introduces a cutting-edge HF RFID read/write device series, marking a significant leap in identification technology. These devices seamlessly merge an exceptionally high read range with additional features, all encapsulated in a compact, optimised flat-pack design. Built upon proven high-frequency RFID


technology operating at 13.56 MHz, in line with ISO 15693 standards, these devices are tailored for guided industrial applications. They excel in scenarios where automatic identification of uniformly positioned and aligned objects or RFID tags is imperative. The key focus of these HF RFID read/write


devices is on flexibility, which is evident in their unique read range capabilities. With an adjustable detection range of up to 30cm, users gain unparalleled adaptability, allowing these devices to be fine-tuned for specific applications. The revised flat-pack design ensures easy integration into diverse application environments. A standout feature in this class of devices is their multitag detection capability. These HF RFID read/write devices can simultaneously identify up to 20 RFID tags in a single read operation, leading to swift throughput times and optimised processes. Beyond flexibility and efficient detection performance, these devices prioritise process


reliability. Complying with an IP67 degree of protection and designed for operation in temperatures ranging from -25˚C to +70˚C, they ensure robust performance even in challenging conditions. Additionally, the devices can autonomously test their resonance frequency, adapting to and mitigating interference from nearby metal objects. The devices incorporate visible status LEDs


for enhanced reliability, providing real-time information on their operational status. Faults and errors are promptly signalled through a red status LED or can be analysed in detail using accessible software parameters. The devices also offer received signal strength indicator (RSSI) values, facilitating early detection of defective tags and preemptive exclusion from processes. Integration of these HF RFID read/write


devices into existing systems is seamless, with two versions catering to diverse user needs. The IQT3* devices, with an IO-Link interface, are suitable for Industry 4.0 applications, offering easy integration into architectures like PROFINET, EtherNet/IP, and EtherCAT. The IQH3* devices, on the other hand, are designed to


POSITION SENSOR FOR STEER-BY-WIRE APPLICATIONS to three components of


flux density (Bx, By, and Bz) applied to the IC, allowing for the accurate


detection of movement of any magnet in its vicinity. This is supported by an analog-to-digital converter (ADC), a robust digital signal processor (DSP) for sophisticated signal processing, and an output stage driver for SPI signal output. The MLX90427 can


transition between four distinct operating


The MLX90427, new to Melexis’s magnetic position sensor portfolio, is tailored for embedded position sensor applications requiring high functional safety levels. This has an SPI output with four distinct modes, and includes rotary, joystick, and rotary stray field with internal angle computation, alongside one mode for raw data output. This is said to be ideal for steer-by-wire


applications. For such applications, where there is no mechanical linkage between the steering wheel and steering rack, position sensors are a critical component that must offer reliability, functional safety and accuracy. The requirements for sensors in electric vehicles are heightened, necessitating excellent EMC robustness and stray field immunity. At the core of the MLX90427 is the Triaxis hall magnetic sensing element which exhibits sensitivity


26 DESIGN SOLUTIONS MAY 2024


modes, including a standard rotary mode with two performance ranges, a joystick mode for XYZ 3D position sensing applications, and the 360-degree stray field immune mode for continuous rotational feedback in noisy environments. Within a vehicle, this enables the IC to be utilised in various applications, such as steering, gearbox shifting, and wider human-machine interfaces (HMIs) like infotainment control knobs. The product is 5V and 3V3 application compatible


and features an operating temperature range of -40˚C to 160˚C. The implementation of built-in self-diagnostics ensures swift fault reporting, which enhances the safety of critical systems.


Melexis www.melexis.com/MLX90427


A COMPACT CAPACITIVE SENSOR


In many industrial flow and level sensing applications, accurate and reliable detection of fill levels is a key requirement. Capacitive sensing offers advantages, especially on applications involving aggressive liquids, food or sensitive pharmaceutical fluids used in closed containers, or where contact with foreign particles must be avoided. But in some applications, microfilms or residues will adhere to the inside of the walls of tanks and vessels as the fill level drops. To help, Baumer is offering the compact yet


robust PL240 capacitive sensor. This can be attached outside plastic or glass tanks – even those with a wall thickness of up to 6mm. Measuring just 40mm x 40mm, the


sensor can reliably detect point levels of water-based media, such as cleaning fluids, milk or laboratory liquids thanks to compensating adherence. It be quickly attached directly onto tanks,


vessels or tubes using adhesive tape, cable ties or screws; and it offers a very high performance, allowing for air gaps of up to 1mm between the tank and the sensor. This means the sensor can be installed on a machine part when using swap containers, especially where direct contact is sometimes not possible, or is difficult to establish.


Baumer T: 01793 783839 www.baumer.com/gb/en


interface with IDENTControl interfaces from Pepperl+Fuchs, catering to more complex applications and older Fieldbus protocols. In conclusion, Pepperl+Fuchs’ HF RFID


read/write devices present a breakthrough in identification technology, offering maximum application flexibility, reliable multitag capabilities, and autonomous adjustment to environmental interferences. With seamless integration options via IO-Link or IDENTControl, these devices provide a future- proof solution for diverse automation needs.


Pepperl+Fuchs www.pepperl-fuchs.com


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