Abstract: This disclosure relates to medical fluid sensors and related systems and methods. In some aspects, a medical fluid cartridge includes a body including a first portion defining a first fluid passageway and a second portion defining a second fluid passageway in fluid communication with the first fluid passageway. The body defines a gap between the first portion of the body and the second portion of the body such that the first portion of the body can be disposed in a radio frequency device while the second portion of the body remains outside the radio frequency device.

Abstract: This disclosure relates to medical fluid sensors and related systems and methods. In certain aspects, a nuclear magnetic resonance device includes a support frame, a first magnet connected to the support frame, a second magnet connected to the support frame in a manner such that the second magnet is disposed within the magnetic field of the first magnet and a magnetic attraction exists between the first magnet and the second magnet, and a spacer disposed between the first magnet and the second magnet. The spacer is configured to maintain a space between the first magnet and the second magnet.