Air Trak

V12 Engine & Vehicle Test System

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Air-Trak Model 628S

The Air-Trak Model 628S was originally designed to work specifically with Sierra’s Model BG-3 engine emissions sampling system as an extremely fast, accurate, and repeatable engine air intake mass flow meter. In addition, the instrument has proven to be an excellent solution across the board in all engine testing applications.

Air-Trak is specifically designed to measure engine air intake mass flow rate. The meter uses Sierra's Fast-Flo™ Sensor Technology for an extremely fast 200 millisecond response-time making it ideal for the toughest transient test cycles. Where flow excursion can approach 10:1 within less than two seconds.

Integral Dual-Plate laminar flow conditioning elements and wide 15:1 turndown make Air-Trak a flexible solution for the constrained piping environments commonly found in today’s engine test cells.
In addition, the versatile microprocessor-based instrument integrates the functions of flow-range adjustment, meter validation and diagnostics in a probe-mounted NEMA 4X (IP65) housing.

• High performance research-grade.

• Plug and play with Model BG-3.

• High accuracy of +/-2% of reading.

• Outstanding 15:1 turndown for high accuracy at low idle conditions.

• 200 millisecond response time to changes in flow rates.

• Fits pipe sizes from 1" to 24".

Technical Datasheet
Rev. A