APM 520A

The Envirotech APM 520 A Flow Calibrator is designed to provide a reliable and portable flow standard for flow  verification of environmental sampling systems. The APM 520 A is a primary flow calibrator based on a standard  glass body soap bubble meter. A portable vacuum pump is provided for motion through a fixed volume and a  calibrated watch is also provided to read the traveling time of soap film through a fixed volume. Each APM 520A  calibrator is calibrated using a standard volume traceable.

Special features : 

• Primary Standard based on Soap  bubble meter.
•  Dimensional & timing accuracy  traceable to national standards.
• Suitable for verifying rotameters used  in air monitoring systems.