New laser sensor is now even more versatile

The space-saving PT120320, which operates on the principle of time-of-flight measurement, has been available since mid-2016 and has now proven itself as a reliable problem solver in hundreds of applications.

We are pleased that the sensor is well received. Nevertheless, it was time to revise the device to make it just a little bit better. The result is the PT120520 laser sensor with two major innovations. A new sensor chip has increased the range by a factor of 8 to 1,200mm at a similarly low power. In addition, there is an optionally usable IO-Link interface, which offers many new setting options and provides valuable diagnostic data.

As usual, the PT120520 can be taught in via a teach-in input. However, the IO-Link interface offers a whole range of new advantages for practical applications. If the switching distance of 1,200mm is not sufficient for an application, the range can be increased to 4,000mm via IO-Link by selecting the ''Long'' mode in the settings. For fine tuning, the detection range can be limited in width, whereby edge objects are actively blanked out. Increasing the sample time, i.e. the time interval between the individual measurements, leads to a lower switching frequency, but has the decisive advantage of being able to detect even objects with comparatively poor reflection properties.

The influence of the settings on the sensor itself can be read in various parameters, whereby the current switching distance and the switching state of the output are self-explanatory. The ambient rate offers a high added value for the commissioning, but also for a possible troubleshooting, since it allows a conclusion on the acting ambient light. The so-called ''Spad Number'' shows the number of pulses used for the measurement result. These features are also valuable assistance during commissioning and troubleshooting.