METHODS Available to Purchase

Clip‐on ammeters check pipe corrosion. Corrosion control technicians working for British Gas, North Thames region are using clip‐on ammeters to detect low currents in domestic supply pipes. Gas mains feeding these pipes are already cathodically protected as part of the North Thames anti‐corrosion policy. However, the detection of low DC current at the customer entry point is a critical part of monitoring the overall performance of the pipe protection system.