Electricity + Control January 2017

CONTROL SYSTEMS + AUTOMATION

ROUND UP

New contrast sensor A new contrast sensor that combines product usability with high perfor- mance has been added to the Leuze sensing solution product line-up. Ideally suited to packaging processes, the innovative sensor will provide reliable detection in foil bag packaging machines as well as for label de- tection in filling systems. Available from Countapulse Controls , the new Leuze KRT 18B contrast sensor is a flexible multi-colour device which uses the three LED colours of red, green and blue to automatically determine the colour that produces the maximum contrast with the detected mark. A significant feature is that reliable detection is possible even on glossy surfaces or when marks are faded.This is due to the automatic sensitivity readjustment. Equipped with a high switching frequency of up to 22 kHz, shortened response times are possible when using the Leuze KRT 18B.

New M8 inductive sensors At this year's SPS IPC Drives fair in Nuremberg, Turck pre- sented its new range of M8 inductive proximity switches. The technology within these ferrite core sensors has been completely upgraded, increasing the switching distance by up to 50%. As a result, M8 devices for flush mounting

can now also be offered with an extended switching distance of 3 mm as well as with the conventional switch- ing distance of 2 mm. The non-flush sensors are also available with a 3 or 5 mm switching distance. Thanks to the newly developed sen- sor electronics, Turck is also

An alignment aid on the 13 mm focal point means the sensor can be easily aligned and rapidly put into operation. Different models of the sensor are avail- able for simple switching point adjustment and each incorporates a self-adjusting bar graph for optimal display of the signal quality. One variant of the Leuze KRT 18B has two teach buttons for calibration on background and mark, while another has a potentiometer and a colour selection button. The device is housed in an ECOLAB tested housing that is rated to IP 67 and IP 69. Enquiries: Gerry Bryant.Tel. +27 (0) 11 615 7556 or email bryant@countapulse.co.za

able to produce devices with an ultra-short 15 mm housing length. The modular development approach for this device series has led to a broad range of variants that allows users to find the optimum M8 switch for their application, without any compromises.The sensors are available in 15, 22, 30 and 40mm lengths. On the output sideTurck is offeringM12 or M8 connectors as well as devices with a cable outlet. Other vari- ants are possible due to the choice between devices for flush or non-flush mounting with standard or extended switching distance. The sensors with a cable outlet are provided with a cable suitable for drag chain use, and a semi-transparent LED ring at the sensor end, which shows the switching state from any viewing angle. Enquiries: RET Automation Controls. BrandonTopham. Email brandon.topham@retautomation.com The PS series submersible pressure transmitters are used for level measurement in containers, tanks, wells, flowing water, bore holes and wastewater plants. The accuracy of 0,5% and the long-term stability of 0,2% per year contribute to the reliable operation of the transmit- ter. All submersible pressure transmitters have a robust high-grade stainless steel housing. For standard appli- cations the favourably priced PUR cable can be used. For applications where a high resistance to media is requested (e.g. slurry, oils or fuels) the FEP cable is avail- able. The ATEX submersible pressure transmitters of the PS3xxA series are designed for level measurement Stainless steel submersible pressure transmitter

in areas subject to explosion. The sen- sors can be used in zone 0, 1, 2 as well as in mining. The GL approval allows an application in the maritime sector. Enquiries: Tel: +27 (0) 12 450 0400 or email info.za@ifm.com