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Survey Theodolites & Transits

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Survey transits from Bench Mark

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Survey transit theodolites are precise tools built for durability and accuracy. Typically equipped with a three-screw levelling base, they mount securely to a tripod to create a stable foundation for any layout or survey. The instrument body consists of two assemblies:
  • Alidade assembly – includes the telescope, standards, digital display, plate bubbles, compass, and upper tangent screw.
  • Circle assembly – includes the horizontal circle (covered by the alidade plate) and upper clamp screw, producing highly accurate angular readings in the field.
At Bench Mark, we offer a minimum 1-year warranty on all theodolites and transit survey equipment. Each instrument is calibrated before sale to ensure compliance with specifications. You can shop our selection of GeoMeasure and GeoMax digital transit surveying instrument models today!

FAQs

Theodolites (Survey Transits) are an inexpensive and accurate tool for construction layout and basic surveying. A Theodolite (Survey Transit) is a survey instrument designed to precisely measure horizontal and vertical angles. In addition to measuring horizontal and vertical angles, Theodolites (Survey Transits) are used to establish straight lines, to establish horizontal and vertical distances using stadia, and to establish elevations when used as a level.

Yes. While total stations have replaced theodolites in many advanced applications, theodolites remain a reliable, cost-effective tool for layout and angle measurement. They’re still widely used in construction, alignment, and educational surveying where precision and simplicity are priorities.

A transit theodolite is a precision instrument used to measure both horizontal and vertical angles. The term “transit” refers to the instrument’s ability to rotate the telescope completely around its horizontal axis, allowing measurements in both directions. Modern digital theodolites, such as the GeoMeasure SDJ-02, combine this functionality with electronic displays and laser pointers for greater speed and accuracy.

Theodolites provide high angular precision, typically between 1″ and 5″, depending on the model. This accuracy is more than sufficient for layout work, boundary marking, and alignment surveys in construction or engineering environments.

A theodolite is a more advanced optical instrument capable of extremely precise angular measurements, both horizontally and vertically. A transit is a simpler predecessor to the theodolite, used for basic construction layout and alignment work.

A theodolite measures only horizontal and vertical angles, while a total station combines those capabilities with electronic distance measurement (EDM). This makes total stations more versatile for mapping and data collection, but theodolites remain ideal for simple, affordable layout tasks.

For durability and reliability, the GeoMeasure SDJ-02 is an excellent choice. It offers 2″ angular accuracy, a built-in laser pointer, and intuitive digital display – perfect for builders, engineers, and site layout professionals needing precise but easy-to-use equipment.

Theodolite prices vary depending on accuracy, features, and whether the unit is digital or optical. Entry-level theodolites typically start around $1,000–$2,000, while advanced digital models with laser pointers and built-in displays can cost $2,500–$4,000. Contact our sales team for tailored pricing and available promotions.

Bench Mark Equipment and Supplies sells GeoMeasure and GeoMax theodolites and transit survey equipment. We carry a range of models of Theodolite (Survey Transit), one of which will suit your needs, whether a contractor or a surveyor. Bench Mark Equipment and Supplies is a Canadian business based in Calgary that has a strong presence in the provinces of British Columbia, Alberta and Saskatchewan for theodolites.

If you only need a theodolite for a short-term project or training program, renting can be a cost-effective option. Bench Mark offers flexible rental plans that include setup assistance and technical support. Every unit is tested before shipment to ensure you get reliable, ready-to-use equipment for your project.

Using a digital survey theodolite

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Digital theodolites are easy to use, and Bench Mark ensures you’re supported every step of the way. Here is how to operate your digital survey transit:
  • Set up securely – mount the transit surveying instrument over a point using the optical plummet on the base.
  • Back-sight your instrument – sight the crosshairs and focus the telescope on a reference point (e.g., a pole at least 150 feet away).
  • Zero the device – hit the set-zero button to initialize your transit survey equipment.
  • Take measurements – read horizontal and vertical angles directly on the LED display.
  • Proper storage – return the theodolite to its case after use (never close the case when the instrument is wet).
Bench Mark guarantee: If you encounter any issues while operating your transit surveying instrument, a quick five-minute phone call to our experts will get you back on track.
Surveyor with GPS pole and tripod near industrial buildings

America's best-selling survey transit theodolites

GeoMeasure SDJ-02 & GeoMax Zipp-02

At Bench Mark, we proudly offer two of America’s top-selling theodolites for contractors and surveyors.

GeoMeasure SDJ-02 Key Features

  • Single horizontal spindle with cross telescope for improved precision
  • Shock-resistant design for long-term durability
  • Absolute angular encoder system – simplifies angle measurement without passing zero
  • Dual-sided LCD display with backlight – shows horizontal and vertical angles simultaneously

GeoMax Zipp-02 Key Features:

  • Vertical compensation and 2-inch accuracy
  • High-quality steel axis system for maximum durability
  • Dual-sided backlit LCD with six one-touch buttons for fast operation
  • Designed for checking angles and short-range levelling in the field
Bench mark’s selection of theodolites ensures accuracy, reliability, and ruggedness. As part of our complete offering of transit survey equipment, these models are trusted solutions for professionals seeking dependable transit surveying instruments.
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