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Tank Testing Equipment

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M. C. Miller offers convenient testing kits for “structure-to-soil” voltage readings on above-grade storage tanks and also reference electrode probes for use in taking “tank bottom-to-soil” voltage readings via perforated PVC piping running below grade underneath a storage tank.


We offer both an analog and a digital voltmeter version of the tank test kit and the kits are identical other than with regard to the nature of the meter display. The digital version allows both negative and positive voltages to be displayed, whereas only positive voltages are displayed via the analog meter. On the other hand, the analog display offers a color divided scale for convenient indication as to whether or not a carbon-steel structure is receiving a suitable level of cathodic protection, with respect to the accepted 0.85V (850mV) threshold value.

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