WFMSWFMS, a manufacturer of custody-transfer metering equipment for oil & gas, has improved its WFMS SCS Bi-Directional Liquid Prover with the introduction of the BT tipped launching chambers. The launching chambers of the WFMS SCS Horizontal Prover are tipped to allow the sphere to easily launch into the pre-run and calibrated section without the use of a ramp. By tipping the horizontal launchers as little as 2 degrees, the sphere returns to a position where it easily launches into the prover piping during proving, and at low water draw flowrates during calibration in the shop and in the field. Eliminating the previously used launching ramp also reduces cost and saves time when cleaning the prover in preparation for water draws in the future. The SCS (Straight Calibrated Section) Prover is available in line sizes from 3 inches to 42 inches and ANSI Flange Ratings from ANSI 150 to ANSI 900. Water draws in the shop and in the field by independent third parties have shown repeatability of 0.002 percent to 0.007 percent. The over inflation of the sphere needs to be only 1 percent to 2 percent.