Section XVIII — Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof
Chapter 90 — Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof
Heading 9030 — Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring or checking electrical quantities, excluding meters of heading 90.28; instruments and apparatus for measuring or detecting alpha, beta, gamma, Xray, cosmic or other ionising radiations.
Subheading 9030.40 — Other instruments and apparatus, specially designed for telecommunications (for example, crosstalk meters, gain measuring instruments, distortion factor meters, psophometers)