Diameters are available in 22 and 25mm.

Even values are divided into even and uneven, with even values categorized as S, R, K even, N even being the uneven type, two wires being the uneven type, and four wires being the even type.

During use, follow the instructions manual for operation, properly connect the probe to the measuring instrument, and calibrate and adjust as needed. Be sure to keep the probe dry and clean, and avoid contact with corrosive substances like strong acids and bases.