Short Answer: Passive cables rely on a SwitchBox for switching electronics, but Active cables have switching electronics inside.
Long Answer: Advanced Geosciences manufactures two types of electrode cables. Active and Passive. The Active electrode cables have switching electronics embedded in them whereas the Passive electrode cables connect to a Switchbox that contains all switching electronics.
Other Key Differences:
|Passive Electrode Cables||Active Electrode Cables|
|No separate IP take outs on each electrode||Separate IP takeout on each electrode with dedicated conductors optimized for each signal that is traveling on them|
One mode of operation in which the stainless steel electrode both transmits and receives a signal (Non-polarised electrodes can also be used in limited instances)
Can operate in two modes of operation:
1. A mode that uses the stainless steel electrode to both transmit and receive signal
2. A mode that transmits on the stainless steel electrode but makes all measurements on a non-polarizable electrode
|Less cost for the same array if you are only measuring using resistivity||Costs more than Passive Cables due to additional features used beyond resistivity measurements (such as IP measurements)|