Calibration pot provides accurate calibration of chemical injection pumps and eliminates spill due to glass breakage. The design utilizes a tank with a shielded tubular gauge for maximum protection from glass breakage. These gauges can be supplied with threaded NPT or flanged 150# end connections and can withstand pressures of up to 150 PsiG. standard materials of construction include PVC, carbon steel or stainless steel. Each gauge is hand calibrated to ensure maximum accuracy.