光学经纬仪
Optical theodolites need no batteries, survive rough handling and remain standard teaching instruments in many engineering colleges. We build 1-second and 2-second micrometer models, a 6-second scale-reading instrument, a 20-second vernier transit and a builders' transit-level for simple site work. Reading system, least count and whether students must learn vernier reading decide the choice. Accuracy checks follow ISO 17123-3, and plummets can be verified using ISO 17123-7.
Single instruments, complete laboratories or government tenders — our export engineers prepare the configuration, proforma invoice and shipping documents.
