Model 600 Atmospheric Probes are designed to monitor corrosion of a gaseous environment. A thin strip, typically of Pipe Grade Carbon Steel is laminated to a glass epoxy board and attaches at one end to a special CORROSOMETER® cable. The cable must be ordered separately. One half the metal is exposed to the corrosive environment to obtain the measurement, the other half is coated and acts as a reference element. Elements are normally 4 or 8 mils thick with a useful measuring range equal to half the original thickness. The probe may be grounded to an exposed metallic structure to monitor the effectiveness of cathodic protection being applied to the structure.