Warmup Control Unit for Snow Melting and Roof & Gutter applications, 2 Zone control, 115/230VAC, 3 x 15 amp dry contacts. Works with ETOR and/or ETOG sensors. Requires external relay contactors to operate and switch loads/heating cables. US$ 462.18 Min. order: 1 piece ★★★★★ 4.6 (257 reviews) Sold : Login>>