The ISA 1932 Nozzle is used for high velocity, non-viscous, erosive flows which would wear or damage an orifice plate. Typically nozzles have a larg capacity and well accuracy with high velocity flows.The required straight inlet section is much less than an orifice and the discharge coefficient of the nozzle is such that a nozzle can measure approximately 55% higher flow rates than an orifice plate with a similar beta ratio and design differential pressure.
The typical uncertainty of uncalibrated ISA 1932 nozzles is +/-0,8%.