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Sokkia Digital Theodolites DT50 Series (DT57-7″)

The DT57 is a lightweight and compact device with no laser beam. The accuracy of DT57 is 7”. The tilt angle compensation is present in this theodolite model. The display of DT57 is double-faced.

All the Theodolite you’ll need
  • High-accuracy measurements 
  • Ultra-rugged IP66 dust and heavy rain protection
  • Compact and lightweight
  • Long-lasting Li-ion or AA battery life
  • Easy-to-use LCD backlit display(s)
  • Embedded tilt sensor
Make your next job a snap

With the DT50 Series, you’ll be up and working fast, thanks to its simple interface and large, easy-to-see backlit LCD. There’s an optical plummet that makes set up over a control point easy, and a tilt sensor that provides ±3-minute angle correction. The DT50 Series features two magnification choices of 26x and 30x, a super-short 3 ft. minimum focus distance for those tight areas, and angle accuracies of 5, 7, and 9 arc seconds.

DT50 Series Digital Transit
DT50 Series Digital Transit
The ultimate in continuous operation

The DT50/DT50L Series provides up to 30 workdays of operation in Angle  Measurement Mode on 4 AA or optional Li-ion batteries, better than any other model. When it is time to change batteries, it’s as easy as snapping out the old ones and snapping in the new ones.

Durability, accuracy, and value

The DT50 Series represents the highest accuracy and value in digital theodolite technology. Our 80 plus years of experience manufacturing the world’s most precise optical survey instruments shines through in the precision, durability, and advanced technology found in each DT50.

Kit Components

• Instrument
• Plumb bob (optional)
• Tool kit
• Lint free lens cloth
• Hard shell carry case

Water and dustproof

• IP66 rating
• Treated telescope to prevent moisture and eliminate lens fogging
• Rainproof
• Dustproof

Long-lasting power options

• Up to 30 workdays of operation
• Topcon BDC71 Li-ion battery (Optional)
• Or traditional AA batteries

Simple Operation

• Large, high-contrast, backlit LCD’s
• Simple five-button interface panel
• Horizontal and vertical angles
• Slope by percent on angle

Tilt compensation

Yes

Operating Time (4 AA alkaline batteries) theodolite only

~ 230 hours

Operating time (Li-Ion) theodolite only

~ 300 hours

Length

149 mm

Aperture

45 mm

Field of view

1°30' (26 m/1,000 m)

Resolving power

2.5”

Minimum focus

0.9 m

Detecting

Horizontal: 1 side
Vertical: 1 side

Minimum Reading

5” (0.002 gon/0.05 mil)/10” (0.005 gon/0.1 mil) (selectable)

Accuracy

7”

Display

2 sides

Tilt Angle Compensation Type

Automatic vertical compensator

Compensation constant

Can be changed (compensation is done at the same time with a vertical angle 0 points)

Signal source

Red laser diode (633 nm)

Laser beam range

50 m (in daylight)

Ingress protection

Dust and water resistance IP66 (JIS C 0920 : 2003)

Operating temperature range

-20 to 50°C (-4 to 122°F)

Size (with handle) W x D x H

173 x 181 x 318 mm

Weight (with batteries and battery holder)

4.1 kg (9.04 lb)

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