Ammonia Analyzer for Disease Diagnosis Applications

Many clinical diagnoses depend on the electronic equipment to detect and treat the diseases from basic illness to fatal diseases or injuries. But, most of the diagnosis techniques are invasive and cause pain or uncomfortable issues to the patients. However, the non-invasive methods, like breath exhale testing which is completely painless. In this work, we report a preliminary study of simple and compact wireless smartphone based sensing device. This device was fabricated to detect the ammonia vapor in the human exhaled breath towards diagnosing renal disease. The sensing performance of the device was tested in laboratory conditions and the obtained results are as follows. The developed device exhibited good sensing response of 584 % with response and recovery time in the order of seconds towards 50 ppm for ammonia vapor. Furthermore, ammonia sensitivity and selectivity tests are carried out for the developed breath analyzer device and the results are reported.