\paragraph{Anchors}

\begin{center}
    \begin{tikzpicture}
            \draw[step = 0.5cm, gray, very thin] (-3.25, -4.25) grid (3.25, 0.25);
            
            \node[separator, scale = 2] (Bempty) at (-1.5, -1.5) {};
            \node[anchor = south] at (0, 0.25) {\textbf{\textbackslash node[column, scale = 2]}};
            \node[separator, scale = 2] (B) at (1.5, -1.5) {};
            \node[cross] at (B.center) {};
            \node[anchor = west, font = \tiny] at (B.center) {C};
            \node[cross] at (B.east) {};
            \node[anchor = west, font = \tiny] at (B.east) {E};
            \node[cross] at (B.west) {};
            \node[anchor = east, font = \tiny] at (B.west) {W};
            \node[cross] at (B.north) {};
            \node[anchor = south, font = \tiny] at (B.north) {N};
            \node[cross] at (B.south) {};
            \node[anchor = north, font = \tiny] at (B.south) {S};

            \node[cross] at (B.northeast) {};
            \node[anchor = south west, font = \tiny] at (B.northeast) {NE};
            \node[cross] at (B.near northeast) {};
            \node[anchor = west, font = \tiny] at (B.near northeast) {nNE};

            \node[cross] at (B.southeast) {};
            \node[anchor = north west, font = \tiny] at (B.southeast) {SE};
            \node[cross] at (B.near southeast) {};
            \node[anchor = west, font = \tiny] at (B.near southeast) {nSE};

            \node[cross] at (B.northwest) {};
            \node[anchor = south east, font = \tiny] at (B.northwest) {NW};
            \node[cross] at (B.near northwest) {};
            \node[anchor = east, font = \tiny] at (B.near northwest) {nNW};

            \node[cross] at (B.southwest) {};
            \node[anchor = north east, font = \tiny] at (B.southwest) {SW};
            \node[cross] at (B.near southwest) {};
            \node[anchor = east, font = \tiny] at (B.near southwest) {nSW};
    \end{tikzpicture}
\end{center}

\paragraph{Options}

\begin{center}
    \begin{tikzpicture}
        \draw[step = 0.5cm, gray, very thin] (-7.25, -2.25) grid (7.25, 0.25);

        \node[separator, /separator= sifter] (A) at (-6.0, -0.75) {};
        \node[anchor = south] at (-6.0, 0.25) {\textbf{sifter}};

        \node[separator, /separator= impact] (A) at (-2.0, -0.75) {};
        \node[anchor = south] at (-2.0, 0.25) {\textbf{impact}};

        \node[separator, /separator= gravity] (A) at (2.0, -0.75) {};
        \node[anchor = south] at (2.0, 0.25) {\textbf{gravity}};
        
        \node[separator, /separator= wet scrubber] (A) at (6.0, -0.75) {};
        \node[anchor = south] at (6.0, 0.25) {\textbf{wet scrubber}};
    \end{tikzpicture}
    \\[0.25cm]
    \begin{tikzpicture}
        \draw[step = 0.5cm, gray, very thin] (-7.25, -2.25) grid (7.25, 0.25);

        \node[separator, /separator= spray] (A) at (-6.0, -0.75) {};
        \node[anchor = south] at (-6.0, 0.25) {\textbf{spray}};

        \node[separator, /separator= electrostatic] (A) at (-2.0, -0.75) {};
        \node[anchor = south] at (-2.0, 0.25) {\textbf{electrostatic}};

        \node[separator, /separator= electromagnetic] (A) at (2.0, -0.75) {};
        \node[anchor = south] at (2.0, 0.25) {\textbf{electromagnetic}};
        
        \node[separator, /separator=permanent magnet] (A) at (6.0, -0.75) {};
        \node[anchor = south] at (5.7, 0.25) {\textbf{permanent magnet}};
    \end{tikzpicture}
    \\[0.25cm]
    \begin{tikzpicture}
        \draw[step = 0.5cm, gray, very thin] (-7.25, -2.25) grid (7.25, 0.25);

        \node[separator, /separator= cyclone] (A) at (-2.0, -0.75) {};
        \node[anchor = south] at (-2.0, 0.25) {\textbf{cyclone}};

        \node[separator, /separator= venturi] (A) at (2.0, -0.75) {};
        \node[anchor = south] at (2.0, 0.25) {\textbf{venturi}};
    \end{tikzpicture}
\end{center}