Abstract: A combination corrosion probe and sampling device. The probe is flexible such that it can be inserted into a piece of operating equipment such as a distillation column and reach tray surfaces or the like which heretofore have been difficult, if not impossible, to reach with a probe. The probe allows the measurement of the rate of corrosion over a period of time and further includes a thermocouple and temperature compensation means to assure the accuracy of the amount of corrosion measured. The flexibility of the probe is enabled by a portion of the probe being fabricated from a pliant substantially cylindrical member such as a ribbed cable protector. A capillary tube runs substantially the length of the probe having an open end in close proximity to the location where corrosion is being measured. That capillary tube runs to a sampling valve near the opposite end of the probe.