Survey Instruments – In Brief

ASA Consultancy Service uses a range of branded total stations and related instruments. A brief technical overview of the main models is given below in easy-to-read form.

SOKKIA Electronic Total Station (Model: Nikon DTM-322)

Compact electronic total station suitable for general engineering survey, construction layout and topographical work. Key features include:

  • Extremely fast measurement (approx. 1 second single-shot distance reading).
  • Measurement range beyond 1,000 m without prism (longer with prism). :contentReference[oaicite:0]{index=0}
  • Coaxial laser pointer with the measurement beam for precise targeting. :contentReference[oaicite:1]{index=1}
  • Alphanumeric keyboard allowing fast and error-free data input. :contentReference[oaicite:2]{index=2}
  • Modern FlexField Plus on-board software for higher productivity. :contentReference[oaicite:3]{index=3}
  • Large, high-resolution display with clear visibility in outdoor conditions. :contentReference[oaicite:4]{index=4}
  • Angle accuracy options complying with ISO standards (typically 3″/5″ class). :contentReference[oaicite:5]{index=5}

TOPCON Electronic Total Station (Model: GTS-230N Series)

Rugged total station ideal for heavy construction projects and long-duration field work. Important points:

  • Large internal memory, capable of storing up to about 24,000 survey points. :contentReference[oaicite:6]{index=6}
  • Built-in 24-key alphanumeric keyboard, making code and coordinate entry faster. :contentReference[oaicite:7]{index=7}
  • Graphical display supporting almost any character set for flexible field coding. :contentReference[oaicite:8]{index=8}
  • Long-life Ni-MH on-board battery (BT-52QA) – approx. 10 hours with distance + angle, and about 45 hours for angle measurement only. :contentReference[oaicite:9]{index=9}
  • Designed for day-long survey work with minimum need for battery changes.

Other Instruments

Additional equipment such as autolevels, theodolites, echo sounding instruments, plane tables, chains, tapes and accessories are detailed in the Survey Instruments page.