The A-512 Residual Pressure Manometer is used in the Rice Test method and is mandatory for ASTM D 2041. The sliding scale is graduated from below zero to 130 mm by 1 mm intervals. The U-shaped tube is mounted on a wooden stand and comes complete with mercury.
The A-513 Closed End Pressure Manometer is an absolute pressure gauge with a range of 1-150 mm consisting of a glass U-tube sealed at one end, containing a measured amount of mercury and mounted in a glass dome. The scale is graduated 0 to 75 mm in 1 mm divisions, upward and downward from mid-scale zero. Tubulations on the base take 1/4-in. tubing. The device is constructed to retard mercury surge when the vacuum is released.
ASTM D 2041