Patent ID: 11892420
Assignee: REHNINVENT AB
Field: Measurement (Instruments)
Classification: CPC G  A  B | IPC G

Claim 6:
7. A method for measuring an amount of dirt, the method comprising:
receiving a sample collector, the sample collector having a front surface and a back surface, wherein a dirt sample is attached to the front surface of the sample collector;
placing a first contact in contact with the front surface of the received sample collector at a first contact point and placing a second contact in contact with the front surface of the received sample collector at a second contact point;
positioning an electrically conductive surface in contact with the back surface of the received sample collector, wherein, when the electrically conductive surface is positioned:
a first part of the electrically conductive surface is placed in contact with the back surface of the sample collector at a point transverse to the first contact point on the front surface; and
a second part of the electrically conductive surface is placed in contact with the back surface of the sample collector at a point transverse to the second contact point on the front surface; the method further comprising

measuring an electrical resistance between the first and the second contact,
wherein, when the first and second contact are placed in contact with the front surface and the electrically conductive surface is positioned in contact with the back surface, the measured electrical resistance between the first and second contact represents the amount of dirt of the dirt sample, the represented amount of dirt being situated on the front surface of the sample collector between the first and second contact.