Metrology

Also known as “critical flow venturis” or “critical flow nozzles” Sonic Nozzles are constant volumetric devices that can be operated as state-of-the-art mass meters used across many industries.

• Internationally recognized.
• Excellent repeatability & reproducibility.
• Constant mass flow with varying downstream pressure.
• Differential pressure measurement not required.
• Custom Sizes available to fit most applications.

Subsonic meters such as Circular Arc Nozzles, ASME Flow Nozzles, and Orifice Meters have long been used to provide quality flow measurements in many industrial applications, such as:

• Automotive Body (Cabin) Leakage Measurements
• Measurements of Turbine Engine Components
• Automotive Emissions Testing

• An automated, scalable sonic nozzle test system
• Available in Pressure or Vacuum Models
• Supports testing on 15 different meter types
• Multiple pressure ranges available, including sub-atmospheric
• Compatible with common calibration gasses
• No constraints on test-section diameter or length
• No tight environmental temperature controls required
• Total Automation with closed-loop control
• Uncertainties as low as +/-0.13% 

• An airflow test measurement / flowrate control solution
• Combines the flow measurement, flow control, and logging functionality of a flow computer with a multiple sonic nozzle array
• Operates as a stand-alone device or with a PC for remote logging and monitoring
• Combines the Performance of a Control Valve and a Flow meter in 1 package.

• Use with multiple, sonic nozzles in a common inlet plenum or single, interchangeable sonic nozzles or subsonic meters.
• With instrumentation for data acquisition, computation, monitoring & data logging.
• PC connection required.