Patent ID: 8332009

Claim:
A two-part sensor comprising a first part comprising a sensing device which senses information, a second part comprising a receiving device which receives a measure of the information, and a connector comprising at least one first portion which is magnetic and is attached to one of the sensing device and the receiving device, and at least one second portion which is magnetic and is attached to an other of the sensing device and the receiving device, wherein the first portion and the second portion are connectable and disconnectable to connect and disconnect the sensing device and the receiving device; and in which the connector first portion and the connector second portion are connectable by magnetic forces exerted by the first portion on the second portion and magnetic forces exerted by the second portion on the first portion and in which the magnetic forces are configured more readily to release the receiving device from the sensing device than to release the sensing device from connection with a user of the sensor; in which the connector further comprises a plurality of connector first portions and a plurality of connector second portions, each connector first portion being connectable and disconnectable to a connector second portion; and in which the connector first portions and the connector second portions are attached to the sensing and receiving devices in a polarised arrangement, such as to dictate orientation of the receiving device with respect to the sensing device.