Instruments for contactless monitoring of internal surface roughness

Instruments Dozor-V and Dozor-VK are described whose operation is based on a reflexometric method. Test results are presented for cylindrical surfaces with a diameter of 30–100 mm with various forms of machining and materials. The instruments replace visual monitoring for roughness specimens and they are intended for application directly under industrial conditions. __________ Translated from Izmeritel’naya Tekhnika, No. 3, pp. 29–32, March 2006.