Biomonitoring Device (IMAGE) DOE/Pacific Northwest National Laboratory Caption PNNL's biomonitoring detection system uses two classes of sensors to analyze blood, urine or saliva samples. While small and portable, the sensitive system provides detection levels at parts-per-billion. Credit PNNL Usage Restrictions None License Licensed 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.