With 4 channels to analyze from, two from the Lead receivers and two from the Trail receivers, the RFT-SDDR offers superior insight next to the external features. Some heat exchangers are built with numerous support plates, causing interference with the standard RFT probes. Moreover, for large tubes with an OD greater than 1.5 inch (38.1 mm), the signal footprint is larger and is more subject to being blocked by external features.
Design with the same robustness as other probes, the diameters under 20 mm are equipped with a stainless-steel sleeve. Above 20.0 mm (0.787 in), the probe’s body is made of light, advanced polymer. These probes are particularly well suited for detecting common defects (corrosion, erosion, wear, large pitting) in ferromagnetic tubing, such as heat exchangers and straight boilers.