Switch circuit, switch device, and system

A switch circuit comprising:

• a first circuit including a first switch and first output terminals;
• and
• a second circuit including a second switch and second output terminals, wherein
• the first circuit and the second circuit are connected in series,
• the first circuit has a circuit configuration in which a combination of resistors in a signal path between the first output terminals of the first circuit differs depending on an electrical conduction state of the first switch,
• the second circuit has a circuit configuration in which a combination of resistors in a signal path between the second output terminals of the second circuit differs depending on an electrical conduction state of the second switch,
• the first switch and the second switch are arranged side-by-side to each other, and an operation member of each of the first switch and the second switch is disposed on a same side in the side-by-side arrangement of the first switch and the second switch, and
• the electrical conduction state of the first switch and the electrical conduction state of the second switch are simultaneously changed in response to a simultaneous operation of the operation member of the first switch and the second switch by a detection object.