I bought this sensor to use on my water carrier, with all the good reviews it seemed like a good choice. I really liked it when I received it, it was accurate and easy to use. I love the hold pressure feature for accessing the inner tire on dual wheels. You put it on and then take it out to make it easier for you to read the pressure in the light. One thing, however, he seemed to lose a few pounds after taking it off the valve stem, but that was close enough. However, tonight he has decided to quit smoking. The straight head didn't read at all, the tilted head read but didn't hold readings. Gave up after a few tries. I'll look for something better.