Door sensor with rotation angle encoder

A door sensor installable on a door leaf of a swing or revolving door, in one of a plurality of mounting situations, including mounted on an outside of a left-rotating door, mounted on an inside of the left-rotating door, mounted on an outside of a right-rotating door, and mounted on an inside of the right-rotating door, the door sensor comprising:

• a three-dimensional (3D) image sensor monitoring a monitoring field in front of the door leaf, the sensor including a transmitter and a receiver, and a rotation angle encoder,
• the rotation angle encoder detecting an angle of rotation of the door leaf, and
• a common support which connects the 3D image sensor with the rotation angle encoder,
• wherein the common support includes an installation plane mounting the door sensor on the door leaf and the rotation encoder is arranged inclined with respect to the installation plane by 15 degrees, and a mounting plate having one of an edge or a marker for one of horizontal or vertical alignment of the common support on the door leaf,
• wherein an angle of the rotation encoder is inclined by 30 degrees with respect to the edge or marker;
• and
• wherein the rotation angle encoder is configured to, in a learning mode, detect rotation around at least two axes when the door is opened, ascertain a direction of rotation around the at least two axes, and ascertain a relevant installation situation.