As I said, heart pulse...
We can't help you until you obtain and post a datasheet. The website doesn't have one readily available so it is obviously not a professionally developed product with extensive testing and datasheet like you would find from say for example Linear . My guess is it's piece of garbage. Find a sensor that comes with a real datasheet, not some fly by night hack job.\
DO YOU SEE A DATASHEET LINK ANYWHERE ON THIS PAGE ?
IT'S GARBAGE. FORGET IT.