Boltzmann plots (rotation diagrams) for the W33 Main absorption lines (top left), W33 A emission lines (top right), W33 B emission lines (second row left), W33 Main1 emission lines (second row right), W33 A1 emission lines (third row left), and W33 B1 emission lines (third row right). The positions taken are those of Table 1. The solid and dashed lines in the top left panel represent the first velocity component at V_LSR ~ 33 km s⁻¹ and second velocity component at V_LSR ~ 38 km s⁻¹, respectively. For para-NH₃, g_op = 1. For ortho-NH₃, here the (3,3) and (6,6) levels, g_op = 2. The rotational temperatures are obtained from the corresponding slopes. The numbers mark the rotational temperatures in K.