Kilowatt Korner › DEPARTMENT OF WATER AND POWER VACUUM GAUGE Image 1 of 3 Image 2 of 3 Image 3 of 3 DEPARTMENT OF WATER AND POWER VACUUM GAUGE $250.00 1970s vacuum gauge for testing thermal conductivity. Weston dials. Wood case with leather strap. 8” x 9” x 8” Add To Cart Added! 1970s vacuum gauge for testing thermal conductivity. Weston dials. Wood case with leather strap. 8” x 9” x 8”