zws

of the zws-15 has dimensions of 20 mm x 32 mm x 12 mm. The housing’s design and mounting is compatible with many optical sensors. This facilitates the conversion to ultrasonic sensors for critical applications.

on the top facilitates the convenient setting of the sensor.

in the sensor housing’s upper half indicate the switching output and respectively the analogue output states.

profits from a significant improvement. The sensors reach their operating point only 45 seconds after switching on operating voltage.

• Single switching point (Method A and B)
• Two-way reflective barrier
• Window mode

is suitable for applications, in which the actual distance to the object is also the switching point. A typical application is level control, where the ultrasonic sensor detects the filling level vertically from above during the filling process. The taught switching point corresponds to the maximum filling level. 

The operating mode single switching point +8% (Method B)

is recommended by objects, which move into the detection area from the side. In this case the switching distance is set 8 % further than the actual measured distance to the object. This ensures a reliable switching distance even if the height of the objects varies slightly.

If two switching zws sensors are operating too close to one another, twin mode can be selected to avoid mutual influences. This new feature is integrated in zws sensors from firmware V3.

If more than two zws sensors need to be synchronised, the accessory SyncBox2 can be used. The SyncBox2 generates a synchronisation signal output on pin 2. This permits up to 50 zws sensors to be autonomously synchronised.

The zws sensors with switching output have three operating modes:

• Single switching point (Method A and B)
• Two-way reflective barrier
• Window mode

Teach-in of a single switching point (Method A)

• Place the object to be detected at the desired distance (1).
• Push the button for about 3 seconds.
• Then push the button again for about 1 second.
• Ready.

• Place the object to be detected at the desired distance (1).
• Push the button for about 3 seconds.
• Then push the button again for about 3 seconds.
• Ready.

with a fixed reflector can be set up with the help of a permanently mounted reflector by mounting the zws sensor and the reflector, then pressing the button for approx. 3 seconds and then pressing it once more for approx. 10 seconds. Now, the two-way reflective barrier has been set. 

by initially positioning the object to be detected on the sensor-close window limit (1), pressing the button for approx. 3 seconds, shifting the object to the sensor-distant window limit (2) and pressing the button once more for approx. 1 second. Ready. 

with two detection points on a single switching output, the procedure is the same as setting the analogue.

NCC/NOC

and rising/falling analogue characteristic curve can also be set using the push-button.

The SoundPipe zws1 is attached to the front of the zws-15 or zws-7 sensor. A typical field of application is measuring levels in microplate wells which are used in medical analysis technology. The SoundPipe zws1 can be directly placed over the opening; this makes exact positioning that much easier. The attachment can also be used in scanning gaps of only a few millimetres in width between two objects.

The zws sensors are ideal for probing of circuit boards and wafers in the electronic industry or for use in packaging machines in which high-transparency films must be detected.