Total Station

A Guide to Total Stations:

A total station is a combination of electronic transit and electronic distance measuring device (EDM). With this device, as with transit and tape, one may determine angles and distances from the instrument to points to be surveyed. With the aid of trigonometry, the angles and distances may be used to calculate the actual positions (x, y, and z or northing, easting and elevation) of surveyed points in absolute terms.

A standard transit is basically a telescope with cross-hairs for sighting a target; the telescope is attached to scales for measuring the angle of rotation of the telescope (normally relative to north as 0 degrees) and the angle of inclination of the telescope (relative to the horizontal as 0 degrees). After rotating the telescope to aim at a target, one may read the angle of rotation and the angle of inclination from a scale. The electronic transit provides a digital read-out of those angles instead of a scale; it is both more accurate and less prone to errors arising from interpolating between marks on the scale or from mis-recording. The readout is also continuous; so angles can be checked at any time.

Necessary Accessories to be used with Total Stations:

Prism: Single prism and triple prism

The other part of a total station, the electronic distance measuring device or EDM, measures the distance from the instrument to its target. The EDM sends out an infrared beam which is reflected back to the unit, and the unit uses timing measurements to calculate the distance traveled by the beam. With few exceptions, the EDM requires that the target be highly reflective, and a reflecting prism is normally used as the target. The reflecting prism is a cylindrical device about the diameter of a soft-drink can and about 10 cm. in height; at one end is a glass covering plate and at the other is a truncated cone with a threaded extension. It is normally screwed into a target/bracket on the top of a pole; the pointed tip of the pole is placed on the points to be surveyed.

Tripod and Pole

The total station is mounted on a tripod and leveled before use. Meanwhile, the prism is mounted on a pole of known height; the mounting bracket includes aids for aiming the instrument. The prism is mounted so that its reflection point is aligned with the center of the pole on which it has been mounted. Although the tip of the pole is placed on the point to be surveyed, the instrument must be aimed at the prism. So it will calculate the position of the prism, not the point to be surveyed. Since the prism is directly above the tip, the height of the pole may be subtracted to determine the location of the point. That may be done automatically. (The pole must be held upright, and a bubble level is attached to give the worker holding the pole a check)

Total Station - QTS-9000 - Surveying Equipment (2' Accuracy)

Total Station - QTS-9000 - Surveying Equipment (2' Accuracy)

Total Station - QTS-9000 - Surveying Equipment (2" Accuracy)

• Accuracy: 2”, Minimum Reading: 1"/5"
• The high-capacity lithium battery of our total station can support as long as twenty hours for angle measurement.
• Reflector-less Measurement: within 350 meters.
• The infrared laser instructions allow for fast and accurate target collimation.
• With 2GB SD memory card, the total station can store a large amount of measurement data.

Total Station - QTS-6082 - Surveying Equipment (2' Accuracy)

Total Station - QTS-6082 - Surveying Equipment (2' Accuracy)

Total Station - QTS-6082 - Surveying Equipment (2" Accuracy)

• Advanced Total Station unit
• Economical with excellent Price/Quality ratio
• User-friendly
• Large LCD Display
• Expanded display with 7 digit indication (before decimal point)
• Direct data port
• Advanced measurement program
• Easy to manage data
• Open communication mode
• Reliable construction and advanced design of the instrument guarantee the instrument's high accuracy
• Laser plummet as standard accessory
• 2 Year warranty included

Total Station - QTS-6085 - Economical Total Station with 5' Accuracy

Total Station - QTS-6085 - Economical Total Station with 5' Accuracy

QTS-6085 Total Station (5" Accuracy)

• Top of the Line and easy to use Total Station
• Economical with excellent Price/Quality ratio
• RS-232C interface
• Expanded display with 7 digit indication (before decimal point)
• Double readings, automaticlly eliminate the circle eccentric error
• Coaxial tangent screw
• Double focusing for telescope, fast focusing
• IEC529, IP54 grade
• Laser plummet as standard accessory
• 2 Year warranty included