#$%^&*AU2020100588A420200604.pdf#####14 ABSTRACT The present invention relates a mind-altering substance testing unit. The unit includes a substance sensor for sensing the mind-altering substance from a sample. An orientation sensor is provided for sensing an orientation of the testing unit. An indicator is provided for indicating correct or incorrect operation of the testing unit using the sensed orientation when sensing the mind-altering substance. Advantageously, the indicator may be used to correctly orient the testing unit for correct operation when sensing the mind-altering substance for improved substance sensing.to 6 to° 200 -202 345 , -
