The constant vacuum method

The constant vacuum method is continuously maintained by a regulated vacuum pump. The vacuum can be set between atmospheric pressure and 85 kPa.

Tension-controlled extraction

A tensiometer measures the soil water tension.  The programmable vacuum station VS automatically supplies a vacuum in correspondence to the measured tension.  Due to the numerous functions of the unit, an optimal adaptation to the sampling task is possible.

Applications

• Long term monitoring projects
• Studies on leachate under defined conditions
• Soil water extraction from a certain pore size with a vacuum which is exactly suitable to the pore size
• Lysimeter sites

Benefits

• High accuracy vacuum pump
• Two vacuum outlets
• Selectable constant or tension controlled vacuum
• Optimized for use with rechargeable batteries
• Input for one tensiometer: T8, T4, or T5
• Multiple configuration options
• Integrated data logger

Limits

• Configurable only by PC or laptop

Specifications

COMPARISONS