Analysis and diagnostic apparatus, not for medical purposes, for the detection of alcohol, drugs, heavy metal, toxin, arsenic, chromium, pesticide, herbicide, petroleum and toxin for laboratory and research use; scientific measuring instruments, namely, conductivity tests, medical laboratory detecting and monitoring instruments for detecting and monitoring the content of alcohol, drugs, heavy metal, toxin, arsenic, chromium, pesticide, herbicide, petroleum and toxin in biological samples, tem...