Sonar - SIMATIC Sensors

Sonar Proximity Switches SIMATIC PXS

From 2.5 cm to 10 m – They Hear Everything!

Our sonar proximity switches sense objects of varying materials, shapes, colors or consistencies with absolute precision, flexibility and reliability. The application potential is almost unlimited. Whether recording fill levels or heights, measuring distances or counting bottles, our switches recognize objects with a wide range of properties from a distance of 2.5 cm to 10 m, regardless whether they are liquid, solid, powdery or even transparent. Surface conditions are irrelevant as well – they can be rough or smooth, clean or dirty, wet or dry. Our proximity switches feature maximum ruggedness and resistance against dirt, vibration and extraneous light or sound.

Highlights

Millimeter-accurate measurement

Color and material-independent, even transparent objects

Individual parameter setting

Small, compact housing

Very high degree of repeat accuracy

UL/CSA approvals

ATEX approval for the application in the explosion-hazard area zone 2/22 (SIMATIC PXS810)

Insensitive to temperature, noise, light and water

Sensors with IO-Link

Function

The Sonar proximity switches only operate through the medium of air and can detect any objects that reflect ultrasound. They emit ultrasonic pulses cyclically. When an object reflects these pulses, the resulting echo is received and converted into an electrical signal. The incoming echo is detected in accordance with its intensity which, in turn, is dependent on the distance between the object and the Sonar proximity switch. Sonar proximity switches operate according to the echo propagation principle, i.e. the time difference between the emitted pulse and the echo pulse is evaluated. The design of the sensor causes the ultrasonic beam to be emitted in the shape of a cone.

Temperature compensation

The compact proximity switches type M30 K2, M30 K3 and M18 are fitted with temperature sensors and a compensation circuit that equalizes changes in operating distances caused by temperature changes.

Synchronization

In compact ranges M30 K2, M30 K3 and M18, several devices can be synchronized with each other by simply interconnecting the synchronization outputs of the devices. Up to 10 devices can be synchronized (or 6 devices in the case of compact range 0). This allows the sensors to be mounted extremely close to each other in many cases without causing mutual interference.

Programming with SONPROG

Programming the devices of the compact ranges M18, M30 K2 and M30 K3

Possible settings include:
- Operating range beginning and end
- Analog range beginning and end
- Switching hysteresis
- Mean value generation
- Multiplex mode
- NO/NC contact switchover