Micro-Flow Technology

Micro-Flow Technology introduces a new dimension in Leak Testing. Unlike pressure decay, it offers a breakthrough in leak testing technology. Providing shorter cycle times, greater temperature stability and low measurement ranges. Before Micro-Flow these advantages required helium mass spectrometry.

How It Works

Micro-Flow is a gas flow measurement technology that utilizes a laminar flow element. This Intelligent Gas Leak Sensor (IGLS) is an ATC patented design that measures volumetric flow. It does this by measuring the flow rate or a gas that is in the viscous flow regime. In the viscous flow regime, gas molecules are more likely to collide with other gas molecules than with the side walls.

While in this state, flow through an annular gap in a laminar flow element will incur friction losses. The result of these losses will be to increase the velocity of flow and decrease gas pressure to maintain a constant flow rate.

The design and high precision machining of the IGLS allows for a more consistent annular gap. This is not possible with a tube or plate style laminar flow element. The design also enables precision control of the measurement gap. Allowing a more fine-tuned sensor for custom-type applications with greater repeatability.

The stand-alone test systems integrate an IGLS with a test circuit. This circuit then maintains a flow of stable air through the IGLS on its way to the Unit Under Test (UUT).

Micro-Flow Diagram - How it Works

To achieve this sequence a series of filling steps bring the UUT up to test pressure. After stabilizing at the correct test pressure measurement steps can take place. These steps force “make-up” air flowing from the reservoir to the UUT to flow through the IGLS. The measured “make-up” flow is then compared to a specified rejection limit.

Micro-Flow Technology differs from Mass Extraction Technology.

Decay to Flow Conversion

Flow Conversion