Precision Proving Ltd. specializes in the proving of custody transfer and sales meters. We prove meters with flow rates of 0.057 – 57 M3/HR with our 8”, and 0.227 – 227 M3/HR with our 12”. Other services include proving sales meters, truck loading and unloading, rail car loading and unloading, prover calibration waterdraws, and master metering. Click the website link on this page to view complete details. Precision Proving has certifications in ISNetworld, ComplyWorks and COR and have offices in Slave Lake, Alberta and Dawson Creek, BC.