Tag Archives: Countapulse Controls


Access guarding in refrigerated applications can pose challenges if the sensing solution selected is not fit-for-purpose. Factors such as temperature range and ambient temperature need to be taken into account.

Countapulse Controls, the official distributor of Leuze sensing solution, offers a safety light curtain specifically engineered to cope with low temperature ranges.

The Leuze MLC 500 series safety light curtain is particularly suited for use in refrigerated areas including cold storage facilities where ambient temperatures can be as low as minus 30°C. The safety light curtains’ design is robust and compact making it suitable for installation in confined areas and those where forklifts or wheeled materials handling equipment is being used.

When coupled with Leuze’s Smart Process Gating technology, this safety light curtain offers a reliable system design which completely eliminates the need for signalling sensors. This makes the access guarding system simpler not only to install but also to operate, and costs associated with maintenance and servicing are also reduced.

Configuration and installation of the Leuze MLC safety light curtains is easy and can be done without PC. Models are available with resolutions from 14 to 90 mm and protective field lengths from 300 mm to 3 000 mm.

Countapulse Controls is able to offer a wide range of sensing solutions for a myriad of applications not only within the food and beverage sector, but across a wide spectrum of industries.


Smart Process Gating, introduced by Leuze, has made muting processes more economical as well as simpler and safer. This technology is available in southern African from leading sensor solutions specialist, Countapulse Controls.

Gerry Bryant, managing director of Countapulse Controls, explains that in intralogistics as well as in the automotive and packaging industries, material locks often need to be safeguarded against unauthorised access by means of safety sensors.

Previously, muting processes with muting sensors were required to clearly identify when transported goods were approaching a protective field. These muting sensors were then to bridge the passing of these goods through the protective field at the correct moment.

Significantly, the Leuze Smart Process Gating method has completely eliminated the need for signal-emitting sensors making this a far simpler and more reliable solution in these applications. This solution is based on the Leuze MLC safety light curtains and this means that conveyor systems can be made more compact.

This configuration of the sensing solution has eliminated the risk of misalignment or damage to the sensors, and in addition because it is so simple to install there is a reduction in capital input costs. There is also a considerable reduction in maintenance and servicing requirements which also reduces costs.

Increased reliability and sensing accuracy is a major advantage of the Leuze Smart Process Grating solution, and this will increase not only productivity but also safety in an operation. In the case of typical intralogistics applications, the height of the protective device is entirely dependent on the safety-related requirements and this sensing methodology does not require synchronisation beams to be taken into consideration, again saving on cost and increasing reliability.

With the Leuze Smart Process Gating solution, the first muting signal comes from the process controller (PLC), while the second muting signal is generated by the protective field itself. Smart Process Gating requires a detailed knowledge of the process so that the necessary control signals are made available in the expected time window.

Countapulse Controls offers a full technical advisory service that can assess any application, and provide the most appropriate solution using Smart Process Gating technology.


Many applications that require the use of absolute encoders are demanding, not just from a performance perspective but also because of the operating environment. An example of this is applications where the encoder has to be explosion-proof due to the dangerous atmosphere in which it operates. Another would be applications that involve harsh environmental influences such as offshore platforms or those that experience huge shock loads of over 100 Gs or even shaft loads of hundreds of Newtons.

The Hengstler AX65 absolute encoder has been engineered to handle all these requirements, and is believed to be one of very few devices that can do this.

Certified explosion-proof, the Hengstler AX65 is built with marine-grade stainless steel and has a shock rating of 200 Gs and shaft load of 300 N. This tough encoder is not only the most compact in its class, it also offers an exceptionally shallow depth and body diameter of only 59 mm. This means it can be installed in applications where other larger explosion-proof encoders cannot be used.

Carrying explosion-proof certification makes it ideal for mines, chemical plants and offshore oil platforms, as well as other applications that require an encoder constructed from marine grade stainless steel. The shaft load rating eliminates the need for load modules, reducing costs.

This device can be installed quickly and easily due to its flexible, quick-connect terminal system. It comes standard with the choice of SSI or CANopen interface, and it is also possible to integrate the CANopen encoder in a ring network configuration.

The Hengstler AX65 is available from Countapulse Controls. The company has a strong customer service ethic and offers strong engineering and technical support.


Countapulse Controls reports that the Leuze cylindrical sensors offer a higher mechanical strength than the standard sensors. Engineered for particularly arduous conditions, the Leuze 328 series sensor is based on the optical platform of the well-known standard Leuze 318B series, however this new device features a metal sleeve in the housing.

The operational sensors available in the new Leuze cylindrical series, which range from throughbeam photoelectric sensors to retro-reflective photoelectric sensors to light scanners with sensitivity adjustment via teach button, are designed with the option of either a cable or plug connection. An adjustable retro-reflective photoelectric sensor model with a polarisation filter is also available for particularly tricky applications.

With ranges of up to 15 metres (throughbeam photoelectric sensors), six metres (retro-reflective photoelectric sensors) and one metre (light scanners), the new Leuze cylindrical sensors are ideally suited to a variety of applications for object detection in materials handling and packaging technology.

The cylindrical sensors are especially popular for integration into constricted production facilities as well as into assemblies in transport systems or other machinery. In many production processes and internal transport systems, these optical sensors are used for the detection of objects and thereby control processes or partial steps. The highly visible light spot facilitates alignment and two antivalent outputs expand the application options.

The quality engineered and manufactured range of Leuze sensors is available from Countapulse Controls who has been providing sensing solutions to business across southern Africa for more than forty years. This Johannesburg based company also operates a technical hotline to ensure that customers have ready access to relevant applications and operational information.