Critical / Sonic nozzles

Flow measurement elements with highest accuracy

EP Ehrler Prüftechnik manufactures sonic nozzles in the flow range from 0.005 up to 2000 m³/h. In addition to the standard range, EP Ehrler Prüftechnik offers customerspecific nozzles which are perfectly designed for your application in accordance to DIN EN ISO 9300*. Nozzle holders including sensor connections are available for all nozzle sizes for installation in customer applications

Several nozzles can be combined to set several volume flows, allowing a high number of different flow rates to be generated rapidly. It is possible to generate e.g. 2^8 = 256 different flow rates using 8 critical nozzles. Binary staggering of the nozzles ensures a uniform coverage of the volume flow range.

* For flow rates less than 0.1 m³/h only based on DIN EN ISO 9300.

Application examples
Calibration of flow meters, e.g. gas meters, LFE, Venturi nozzles, MFM, MFC
Periodic calibration tasks, e.g. calibration device for production parts (valves, actuators, air mass meters, etc.)
Flow reference without further measurement technology

Sortiment
Single nozzles in the flow range from 0.005 to 2000 m³/h
Suitable nozzle holders with sensor connections
Nozzle wheel system for combining different nozzles
SMF® – SonicMasterFlow® nozzle test bench