The measuring system is attached to the Swelltest die head by means of an adaptation kit. The distance to the die head can be adjusted between 12 and 50 mm. A red laser beam emitted from the laser diode in the transmitter is converged into a parallel beam by the transmitter lens. This parallel beam passes through the measuring area before it meets a CCD image sensor in the receiver.

During processing, the extrudate runs through the measuring sector. When the laser beam meets the extrudate, its cross-section is interrupted. This interruption projects a shadow with an area proportional to the diameter of the extrudate on the receiver. The one-dimensional CCD image sensor scans and calculates the shadow area from which
the sample dimensions are calculated by the controller.

Measuring window:
30 x 300 mm

Measuring range:
0.5…10 mm (option: 30 mm)

Measuring resolution:
5 μm

Accuracy:
± 0.03 mm

Sampling rate:
780 c/s

Display resolution:
5 μm

Serial port:
RS 232C, baud rate 300…9,600 b/s adjustable (option)

Analog voltage output:
6 V

Light source:
visible semiconductor laser beam, wavelength 670 nm

Ambient temp. at sensor:
0…40 °C

Power supply:
85…264 VAC, 47…63 Hz

Enclosure rating:
IP 60