Abstract
We demonstrate low-loss measurement of the hyperfine ground state of Rubidium atoms in a dipole trap array of five sites by state dependent fluorescence detection. The presence of atoms and their internal states are minimally altered by utilizing circularly polarized probe light and a strictly controlled quantization axis. We achieve mean state detection fidelity of without correcting for imperfect state preparation or background losses, and when corrected. After state detection and correction for background losses, the probability of atom loss due to the state measurement is and the initial hyperfine state is preserved with probability.