  We have developed a non-collective Thomson scattering diagnostic for
measurements of electron density and temperature on the Large Plasma Device. A
triple grating spectrometer with a tunable notch filter is used to discriminate
the faint scattering signal from the stray light. In this paper we describe the
diagnostic and its calibration via Raman scattering, and present the first
measurements performed with the fully commissioned system. Depending on the
discharge conditions, the measured densities and temperatures range from
4.0$\times$10$^{12}$ cm$^{-3}$ to 2.8$\times$10$^{13}$ cm$^{-3}$, and from 1.2
eV to 6.8 eV, respectively. The variation of the measurement error with plasma
parameters and discharges averaged is also discussed.
