Could you recommend a distance measurement sensor? The sensor will be used to measure spread of a concrete. See an example here:
The idea is that I will place the sensor on the table next to the cone and point the sensor towards the concrete in the cone. The cone gets lifted and the concrete flows. The sensor will point to the concrete from side and measure the distance of the concrete from the sensor while the concrete flows. The result should be distance of the concrete front to the sensor as a function of time.
The requirements are:
The sensor should work with fresh concrete
The sensor should measure the distance at the height approx. 0.5 cm above the table. The concrete layer gets very thin at the end so it should be possible to hit the concrete from side even when the layer is very thin => therefore approx. 0.5 cm
The sensor should work in the range 20 - 50 cm
The precision should be roughly 1 mm
It should measure the distance min approx 5-10 times per second
The price should be roughly below 1000 USD
The unit should have USB or similar to connect it to laptop
It should be possible to buy it in Europe (Denmark, Germany...)
It should work outdoor
Any idea what to use? Should I go with Ultrasound, infrared, laser or anything else? Can you recommend any particular device?