Patent ID: 7994802

Claim:
Apparatus ( 1 ) for examining or monitoring a state or state of health of plants ( 2 ) during growth or a life of such plants ( 2 ) the apparatus comprising a bipolar electrode ( 4 ) that is adapted to be attached to an attachment position ( 6 ) or to an area of the plant ( 2 ) where the bipolar electrode detects electrical signals or potentials output from the plant ( 2 ), the bipolar electrode has at least two poles ( 5 ) for contacting the plant ( 2 ) in a position of use, and the bipolar electrode wraps around the attachment position ( 6 ) on the plant ( 2 ) in the position of use at least partially or completely and are adapted to receive at least one of the electrical signals or potentials of the plant ( 2 ) and the bipolar electrode ( 4 ) is connected to at least one of a detector or a memory ( 7 ) for detecting and evaluating the electrical signals or potentials and for comparing the electrical signals or potentials received at different times, the bipolar electrode ( 4 ) has a holder or a holding end for attachment to the plant ( 2 ), the holder or the holding end of the electrode ( 4 ) is constructed for connection to the plant ( 2 ) as two coils arranged as a double coil or twin coil ( 10 ) having windings in which each of the windings ( 12 , 13 ) arranged parallel to each other carries or forms one of the poles ( 5 ) of the electrode and the double coil ( 10 ) wraps around a measurement position on the plant ( 2 ) on an entire extent of the attachment position ( 6 ), and the two coils forming the double coil ( 10 ) are insulated from each other and from their surroundings and have insulation-free or stripped contact positions for receiving the electrical potential of the plant ( 2 ) directly or for direct contact with a surrounded plant part ( 3 ) on an area facing the plant part or stem of the plant arranged in an interior of the double coil ( 10 ).