Right. My accuracy comment pertains to the 0.5% full scale accuracy. Since that particular unit can measure up to 200 psi, that translates to a 1 psi accuracy. Your readings may be off by as much as 1 psi, but as long as the reading is consistent with 0.1 psi resolution, the accuracy is less important to you. If you wanted accuracy as well, you'd want to find one with either a lower full scale capability or better than 0.5% accuracy.
-Rod