Tristel DUO (IMAGE) Dowling & Dennis PR Caption Tristel DUO’s patented chlorine dioxide chemistry delivers an intermediate-level disinfectant foam approved for use on general medical surfaces, including noninvasive ultrasound transducers and related equipment. Credit Parker Laboratories Inc. Usage Restrictions N/A License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.