LPXJ series of high-speed wire diameter measurement of the range of products, including LPXJ30.8-A-type caliper and LPXJ50.8-A-type caliper, mainly used for high-speed rolling plain bars and ribbed steel-line measurement. Products built eight groups of fixed optical probe can perform the following functions: 1, real-time measurements accurately reflect changes in the size of workpiece; 2, all-digital high-frequency measurement systems, vertical blind measuring less than 200 mm; 3, enabling equipment their measurement precision calibration and self-calibration; 4, thermal expansion coefficient measurement results can be achieved setting temperature correction; 5, round to the common defects such as: "ears", "wrong roll" and other detection; 6, Measuring ribbed steel "ID", "horizontal ribs" and "vertical ribs" size; 7, data "ultra-poor" or temperature "over-temperature" control room and on-site two-way real-time alarm LED screen; 8, the system has to measure the numerical results of the cross section and the curve shows the measurement results with statistical analysis; 9, with a shot from the side data storage function (data stored longer than six months), historical data query can be accurate to seconds; 10, the device comes with air supply system, without the use of rolling workshop circulating water and compressed air; 11, long maintenance intervals, lens maintenance period up to 30 days. Applicable industries: metallurgy, steel rolling, cables and so on. Technical parameters: 1, measuring range: φ5 ~ φ30 mm (LPXJ30.8-A type) φ5 ~ φ50 mm (LPXJ50.8-A) 2, static measurement accuracy: ± 0.02 mm 3, the dynamic measurement accuracy: ± 0.02 mm 4, the measurement frequency: 500 Hz 5, Repeatability: ± 0.007 mm 6, Operating temperature range: -20 ~ + 40 ℃