Since 1999, Tri-State Biomedical Services has repaired and refurbished medical equipment, with a particular focus on pulse oximeter sensors and extension cables. The Elizabethtown company also overhauls oxygen blenders and services fetal transducers and suction regulators in-house through its qualified or factory-trained technicians, while selling compatible and refurbished equipment. Its pulse-oximeter repair work includes parts, cleaning, labor, and final testing on OEM equipment.