Mega System Aster Constant-Flow Isokinetic Sampler

The Aster series is a constant-flow instrument designed for isokinetic sampling of emissions to the atmosphere. It keeps flow constant and automatically compensates for pressure losses; it complies with UNI EN ISO 16911-1 and UNI EN 13284-1. The same body can also be used for ambient monitoring.

• Aster 33: 0.3-25 L/min, 7 kg.
• Aster 55: 1-50 L/min, 12.5 kg.
• Both models have a 338 x 310 x 288 mm body; operation on 230 VAC or external 24 VDC lithium battery.

• 7-inch touchscreen, table and graph display.
• Automatic solenoid valve for leak testing.
• Permanent memory and USB port for data transfer.
• Automatic diagnostics and alarm logging.
• Serial interface to the Lotus computer; comes with a bag.

In isokinetic sampling, gas velocity in the stack and suction velocity at the probe tip are matched, which is fundamental for representing dust correctly. When Aster works with Lotus, it maintains this match automatically.

Tetra selects the flow range for Aster suited to the measurement campaign and supplies it together with Lotus and probe sets. Calibration support is provided for leak testing and flow verification; the instrument can be brought to Tetra for service and adjustment after field work.