One embodiment provides an apparatus, comprising: a first flexible substrate with a plurality of slits and at least one sensor, wherein the slits are arranged around a center of the first flexible substrate, wherein the sensor is arranged between a pair of the slits, and wherein when an object is inserted into an orifice created by the slits, the sensor is configured to maintain contact with the object, thereby allowing a measurement of a characteristic of the object over a predetermined period of time.
