Particle detection system, the sensor device and method for detecting particles in a fluid

The invention relates to a particle detection system (10) for detecting particles (26) in a fluid, especially of wax crystals in the diesel fuel, comprising a screen body (12) having through holes (14) at least at times in a force acting in the working fluid flow (40) is arranged, coupled to said strainer body (12) actuator (20), which excites the screen body (12) in a natural frequency, and connected one with the actuator (20) control unit (30) connecting the actuator (20) to the natural frequency of the screen body (12) readjusts, and coupled to said control unit (30) output unit (32) for outputting a control signal (34), from the control signal of the control unit (30) has a content of particles (26) can be determined in the fluid. The invention further relates to a sensor device (100) having a particle detection system (10) as well as a method for detecting particles (26) in a fluid.