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DeFelsko Certified P3 Polystyrene Blocks are for use with gauges that measure over 1500 µm (60 mils).
For when verification of gauge accuracy at a test site is required each time a coating thickness gauge is put into service, DeFelsko’s certified coating thickness standards have measured values traceable to a National Metrology Institution.
These standards are used to verify the accuracy and operation of mechanical, electronic, eddy-current, or ultrasonic coating thickness gauges, and are certified and labelled in both Metric and Imperial units.
DeFelsko Certified P3 Polystyrene Blocks features a range of 375 µm (15 mils) to 4.5 mm (185 mils).
Certified Polystyrene Blocks have an accuracy of +(2.5 µm + 0.05% of thickness) +(0.1 mil + 0.05% of thickness).
All DeFelsko certified standards are supplied with a Certificate of Calibration traceable to NIST or PTB.
Please see the chart below to select the Standard that most closely matches the measuring range of your gauge.
| Order Code | Ideal for | Block 1* | Block 2* | Block 3* | Block 4* |
| P1 | PosiTector 6000 FT, FTS, NTS, FNTS, FTRS PosiTector 200 D | 375 μm 15 mils | 2 mm 80 mils | 4.5 mm 185 mils | 6.5 mm 250 mils |
| P2 | PosiTector 6000 FJS | 2.5 mm 100 mils | 6.5 mm 250 mils | 13 mm 500 mils | 19 mm 750 mils |
| P3 | 375 μm 15 mils | 1.5 mm 60 mils | 2.5 mm 100 mils | 4.5 mm 185 mils | |
| P4 | 1.5 mm 60 mils | 2.5 mm 100 mils | 4.5 mm 185 mils | 6.5 mm 250 mils | |
| P5 | PosiTector 6000 FKS, NKS | 1.5 mm 60 mils | 2.5 mm 100 mils | 6.5 mm 250 mils | 12 mm 480 mils |
| P6 | PosiTector 200 C | 375 μm 15 mils | 1.5 mm 60 mils | 2.5 mm 100 mils | 3 mm 125 mils |
| P7 | PosiTector 6000 FHXS | 1.5 mm 60 mils | 4.5 mm 185 mils | 6.5 mm 250 mils | 9.5 mm 375 mils |
| P8 | PosiTector 6000 FNGS, FLS | 13 mm 500 mils | 13 mm 500 mils | 13 mm 500 mils | 19 mm 750 mils |
*given measurements are an approximate thickness
