  The next generation BLAST experiment (BLAST-TNG) is a suborbital balloon
payload that seeks to map polarized dust emission in the 250 $\mu$m, 350 $\mu$m
and 500 $\mu$m wavebands. The instrument utilizes a stepped half-wave plate to
reduce systematics. The general requirement of the detectors is that they are
photon-noise-limited and dual-polarization sensitive. To achieve this goal, we
are developing three monolithic arrays of cryogenic sensors, one for each
waveband. Each array is feedhorn-coupled and each spatial pixel consists of two
orthogonally spaced polarization-sensitive microwave kinetic inductance
detectors (MKIDs) fabricated from a Ti/TiN multilayer film. In previous work,
we demonstrated photon-noise-limited sensitivity in 250 $\mu$m waveband single
polarization devices. In this work, we present the first results of
dual-polarization sensitive MKIDs at 250 $\mu$m.
