The QMS 70U-20 is a compact and robust sensor using an unique capacitive sensor technique as well as highly sophisticated electronics. QMS 70U-20 is designed for materials, products, product parts - hereafter denoted as objects - really difficult to be detected. These objects are intermittently aligned and either fixed on carriers or
enclosed in paper or foils. The objects themselves may be made of any non-metallic or metallic substances, like labels, adhesive tapes, magnetic stripes etc.
The single objects may pass the sensing area either sporadically or intermittently aligned. Due to the small sensor gap the thickness of the objects may vary from a fractional amount of 1mm to 2mm. As the carrier or enclosure material is continuous and constant the sensor zeroes the carrier and enclosure material and concentrates only on the objects to be detected.
The QMS70U-20 operates being as all QMS sensors independent of all optical characteristics like colour, transparency, contrast and ambient light, it has no effect on the detection. Detection of transparent labels on transparent carrier foils is therefore easily possible.
Bringing into operation is very easy. Adjustment is performed, if needed at all, at the first commissioning. Due to the auto-taring function, no re-adjustment is needed normally. Pollution and abrasion have no effect on sensor operation in a very wide extent.