Laser

Laser is external optical crankshaft sensor. Serves to receive a signal of the crankshaft speed on engines that are not equipped with a standard crankshaft sensor. Used to perform the CSS test.


90 $

Laser optical sensor Crankshaft frequency signal graph

Laser serves to receive a signal of the crankshaft speed on engines that are not equipped with a standard crankshaft sensor. Used to perform the CSS test.

It can be used to determine the speed of rotation of shafts in a non-contact way. Works with all brands of automotive oscilloscopes.


In order to use the laser optical sensor, optical marks must be applied to the crankshaft pulley, which will act as the teeth of the marker disc. Optical marks can be applied in a variety of ways. It is most convenient to use either a quick-drying white paint, such as a stationery correction fluid, or a white sticky tape.

The width of each of the applied marks must be at least 5 mm, the distance between adjacent marks must also be at least 5 mm. The more marks will be applied to the crankshaft pulley, the smaller the measurement error will be. For a 4-cylinder engine, an optical marker disk should be formed, consisting of at least 8 marks, that is, the number of marks should be at least 2 times the number of engine cylinders.

To focus and direct the laser beam from the optical laser sensor onto the optical marker disc, you will need help of an assistant.

The sensor should be located at a distance of 5 ... 50 cm from the pulley, the light spot from the laser beam should be focused to a size approximately corresponding to half the width of the optical mark (within 5 ... 10 mm).

Depending on the layout of the engine in the engine compartment, as well as on the design features of the crankshaft pulley, optical marks can be applied to any accessible surface of the pulley.