Velemeter C


The Velemeter® C provides highly accurate speed and length measurements and all the advantages of non-contact laser based measuring equipment. The sensors are used in mass flow application as well as for elongation measurement.
As a supplementary sensor to the well established Velemeter® 500 series, the Velemeter® C is the more compact version but also makes use of the advantage of a He/Ne Laser tube.

The Velemeter® C is designed for use in or attached to C-frames of thickness gauges and has an integrated angle optic. The sensor head is mounted to the direction of movement of the material, usually at a standard stand-off distance of 450 mm. We can also provide every stand-off distance between 300 and 1500 mm to allow easy mounting at the mill construction.

The digital signal converter box (DAB) has to be mounted in a cubicle by the user. As basic information we supply a pulse output. The pulse frequency is equal the Doppler frequency and can be supplied with 2 or 4 channels according to the RS422 standard. This output is compatible to mechanical encoders.
Based on this, it is possible to do an upgrade from mechanical encoders to non-contact sensors and still use the same mill control system.


Technical details

Measuring range*: 3 – 3000 m/min
Resolution*: ca. 6 µm
Stand off distance, flexible: 300 - 1500 mm
Depth of field*: ± 10 mm - ± 50 mm
Accuracy: ± 0,05 % (3 Sigma)
Repeatability: ± 0,01 %
Laser light source: He / Ne Laser, 632.8 nm, red, visible
Guaranteed lifetime: 5 years
Pulse output equivalent to the Doppler frequency: RS 422
Analogue output for signal quality: 0-10 V / 4-20 mA
Diagnose interface for service: RS 485
Dimension (L x W x D) 470 x 195 x 139 mm


* depends on the stand-off