Surface Preparation - Blasting Elcometer 103 Blast Nozzle Gauge The Elcometer 103 Blast Nozzle Gauge measures the orifice size of an abrasive blasting nozzle. This gauge is used to determine the nozzle orifice wear which leads to low nozzle pressure and decreased efficiency in the performance of the nozzle’s venturi. Nozzle orifice wear results in decreased productivity and increased abrasive media consumption. To ensure your nozzle provides continuous high production, as a general rule, replace your nozzle when the orifice wears by 1 nozzle size. Using a Blast Nozzle Gauge Technical Specification Part Number Elcometer 103 Blast Nozzle Gauge Black Wax Pencil (Pack of 12) Measuring Range Packing List Elcometer 103 Blast Nozzle Gauge, wax/grease pencil (inside gauge), protective pouch and operating instructions. © 2019 Elcometer Limited. Elcometer is a registered trademark of Elcometer Limited. All other trademarks acknowledged. Due to our policy of continuous improvement, Elcometer Limited reserves the right to change specifications without notice.