Hello Sir, The Load sensor of two models:XXX, Serial NO.XXX went wrong, which we bought from you onX X in 2011. Both the two load sensors went wrong after being used for less than a week, and it is less than one year since we bought them_ I will send them back to you, and please help me what's wrong with them, thanks very much. These are notes report below: February 6th 24:00 1645(install) February 10th 24:00 5845 February 15th 24:00 13145 March 5th 24:00 75461(remove)