Parallax TSL1401-DB Instructions Manual page 22

In the next pair of images, you can see the difference between a full bottle and one that's not so full. To
find the liquid level we use the "First Dark Object Location" measurement:
Full Bottle
Not-so-full Bottle
© Bueno Systems, Inc. • TSL1401-DB (2009.10.01) Page 22 of 52