  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 \(97\%\) without
correcting for imperfect state preparation or background losses, and \(98.7\%\)
when corrected. After state detection and correction for background losses, the
probability of atom loss due to the state measurement is \(<2\%\) and the
initial hyperfine state is preserved with \(>98\%\) probability.
