Calibrated leak channels and orifices
Equivalent Channel Standard (ECS) and Equivalent Channel Device (ECD)
Equivalent Channel Standard (ECS) and Equivalent Channel Device (ECD) are both characterized by the fact that the ratio between length and diameter is >100. ECS devices are supplied with traceable gaging certificate of the inlet diameter, outlet diameter and length. ECD devices on the other hand are certified for flow rate at pressure (standard up to 3 pressure calibration points, air/nitrogen, barometric outlet - others available).
Equivalent channels meet the requirements of US-CAR, SAE J2045, SAE J2587 & SAE J2973 for US-CARB LEV II + PZEV and the EURO-5 Hydrocarbon Emission Standards.
Curves of ECS 15&20
Equivalent Diameter (ED) and Sharp Edge Orifice (SE)
In comparison to the ECS and ECD devices, Sharp Edge (SE) orifices, also known as Equivalent Diameters (ED) have a length to diameter ratio < 50. ED and SE devices are built to size and flow calibrated at test pressure and gas type. As a geometric definition of leak tightness, these devices are recognized by Pharma regulation USP <1207> as they offer the most generic and conservative way to simulate pinholes or leak paths.
Curves of Equivalent Diameter (ED) and Sharp Edge Orifice (SE)
Calibrated leak channels and orifices
Calibrated leak channels and orifices
For conversion of different leak detection units, please also use our leak rate unit converter.
