We report the research progress that has been made on developing various MgB₂ superconducting conductors toward practical applications. Owing to the poor performance of the critical current density (J_c) of bare MgB₂, various techniques have been developed to overcome this obstacle. Among these, chemical doping has proved to be the most effective way to enhance the superconducting properties, such as J_c and the irreversibility field (B_irr). More than a hundred different forms of dopants have been investigated over the past 18 years. Among these, the most effective dopants have been identified to be silicon carbide, carbon, and carbohydrate or hydrocabon. The best results, B_irr of 22 T and J_c of 40,000 A cm² at 4.2 K and 10 T, have been

reported for malic acid treated MgB₂ conductors, which have matched the benchmark performance of commercial low temperature superconductor wire such as Nb–Ti. This presentation will review and discuss the progress on MgB₂ conductor development and solid-nitrogen magnet system over the past 15 years at the University of Wollongong and Hyper Tech Research, US. In addition, we will introduce a fault current limiter with Ningbo, China and a liquid hydrogen level sensor with Sam Dong, Republic of Korea.