Embodiments of the present disclosure are directed to a sensor well system that includes a mounting tube and a clip disposed within the mounting tube and configured to engage with a sensor to secure the sensor within the mounting tube, where the clip is formed from a band of flexible material. The clip includes a curved end portion configured to receive an end portion of the sensor and at least one protrusion disposed along a length of the band outside of the curved end portion such that the at least one protrusion is configured to abut a side of the sensor when the sensor is installed within the sensor well system.