Defelsco PosiTector 200 Advanced ultrasonic coating thickness gauge with type B & C Probes. Measures coating thicknes over wood, concrete, plastics, composites etc. Will measure up to 3 individual layer thickness in a multi-layer system and features a graphic readout. Supplied with both B, 13~1000um for wood, plastic and composites and C probes 50~3800um for coatings on concrete, fibreglass etc. Accuracy is +/- 2um +3% of reading.