Proximity Probes, measure the distance to a conductive surface. 330101: Indicates the basic model of the probe (3300 XL 8 mm Proximity Probe)., 00: Specifies the total length option (in this case 0 meters, refers to the rigid part)., 08: Indicates the length of the case (in this case 0.8 inches, about 20 mm)., 05: Refers to the total length of the cable (in this case 5 meters)., 02: Indicates the connector type and cable material., 00: Refers to other specific options (such as no armor).