Why should I use GeoFlex instead of a short IPI?

The IPI sensors have the flexibility of having variable length gauge tubes. They are most typically installed with 5 or 10 feet gauge tubes, but any length can be used down to about 1.5 feet. The GeoFlex system has a 2 feet gauge length at a cost of about the same as 10 feet gauge tubes for the IPIs, thus you achieve a higher density of readings over the same distance for the same cost.