• Meets ASTM E283 requirements
• Standard Set:  1.000'', 1.500'', and 2.000'' orifices
• Extended Set:  0.250", 0.500" and 2.500" orifices
• NIST Traceable Calibration Certificate for each plate (dimensional)
• 304 Stainless Steel 1/8'' Thick - Sharp Edge Orifice
• Plate sets include quick change holder.  Holder simplifies switching between plates when calibrating airflow systems using ASTM E283 calibration chamber.
  
• Plates can be purchased separately (each plate includes NIST certificate)
• Contact ATS to order custom orifice sizes

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