Prover Spheres
Prover Switches
Sphere Pumps & Sizing Tools
Sphere Picker
EZ Plunger
JoomShopping Download & Support
Flow meters are required to be calibrated at specified times to ensure accurate liquid measurement, which is essential for maintaining operational efficiency, safety, and regulatory compliance in pipeline systems. To achieve this, prover loops are used to “prove” that the flow meters are accurately measuring volumes. Prover spheres are used within these prover loops, to flow through the pipe and activate prover switches. This gives the measurement tech a fixed volume between the two switches allowing for the calibration of the flow meter. See our full line of liquid measurement products below.