Best Dumpy Level

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The minimum acceptable error for any auto level or dumpy level should be less than 1mm for every 10m sighted through the telescope. For example, if you are reading an E-Grad Staff that is 50m away from the dumpy level, then you should be sighting through the telescope to the staff within 5mm of a level plane.

Beyond that, what is the difference between dumpy level and auto level?

Compared to an automatic level, a dumpy level is easier to manipulate but requires more precision from the surveyor. Surveyors will not need to make as many adjustments to a dumpy level as they would to an automatic level, as dumpy levels can retain adjustments for a longer period of time.

Basically, why is it called a dumpy level? The dumpy level is an optical surveying leveling instrument consisting a telescope tube firmly secured in two collars fixed by adjusting screws to the stage by the vertical spindle. ... He invented dumpy level in 1832 while using the conventional Y level. A dumpy level is also called a builder's level, an automatic level.

Besides this, what's a dumpy level?

: a surveyor's level with a short telescope rigidly fixed and rotating only in a horizontal plane.

How much is a bubble tube in dumpy level?

Bubble tubes are provided to check the level of the instrument. Two bubble tubes are provided in a dumpy level which are arranged perpendicular to each other on the top of the telescope. One tube is called as longitudinal bubble tube and another is called as cross bubble tube.

BESTSELLER NO. 1 in 2021

NWI NSLP100B Siteline Level Package

NWI NSLP100B Siteline Level Package
  • Siteline Level, Builders Tripod and 9ft Grade Rod
  • 20x Magnification
  • Leveling Accuracy: 1/4 in at 100-Feet
  • Working Range 200ft
  • Includes carrying case, plumb bob & manual
BESTSELLER NO. 2 in 2021

NWI NCLP32 32X Contractors Automatic Level Package

NWI NCLP32 32X Contractors Automatic Level Package
  • 32x Automatic Level, Builders Tripod and 9ft Grade Rod
  • 32x Magnification
  • Leveling Accuracy 1/16" at 250ft
  • Working Range 400ft
  • Includes carrying case, plumb bob & manual
BESTSELLER NO. 3 in 2021

Automatic Level 32X Optical Transit Survey Auto Level High Precision Level Gauge Measure Meter Machine

Automatic Level 32X Optical Transit Survey Auto Level High Precision Level Gauge Measure Meter Machine
  • Magnification 32x Optical Level with Case,allows you to work without issues, even in low light conditions.
  • 360 degree rotary clear dials, provides more accurate location.
  • The horizontal knobs offer unlimited range, while the circular level enables angular measurements.
  • Comes with a plastic case, which makes it easy to be taken anywhere or to be stored for next time use.
  • Application: Construction engineering survey, deformation and subsidence monitoring, mining survey, etc.
BESTSELLER NO. 4 in 2021

Leica Geosystems 840381 NA320 360 Degree Auto Optical Level

Leica Geosystems 840381 NA320 360 Degree Auto Optical Level
  • Superior performance
  • 20x magnification
  • Water- and dust-tight (IP) and Impact Resistant
  • Simple Operation
  • Ergonomic Design
BESTSELLER NO. 5 in 2021

Bosch GOL24 - 8in. Automatic Optical Level

Bosch GOL24 - 8in. Automatic Optical Level
  • This refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box
BESTSELLER NO. 6 in 2021

DEWALT Builder Level Tool with Tripod and Rod, 20X Magnification (DW090PK)

DEWALT Builder Level Tool with Tripod and Rod, 20X Magnification (DW090PK)
  • 20x magnification offers range of 200 feet or more
  • Accuracy within 1/4-inch per 100 feet
  • 360-degree horizontal circle with vernier scale for precise measuring of horizontal angles
  • Heavy-duty leveling base is fast and easy to set up and level
  • Protected leveling vial for jobsite durability
BESTSELLER NO. 7 in 2021

Johnson Level & Tool 80-5556 Contractor Hand Held Sight Level

Johnson Level & Tool 80-5556 Contractor Hand Held Sight Level
  • Highly durable
  • Easy to use
  • Manufactured in China
BESTSELLER NO. 8 in 2021

AL24M Auto Level with Magnetic Dampened Compensator

AL24M Auto Level with Magnetic Dampened Compensator
  • magnification: 24x
  • Double-sided, continuous horizontal tangent drives
  • Stadia lines for simple distance measurement
  • Convenient horizontal angle measurement
  • Built in bubble mirror and optical sighting alignment
  • Metal housing for increased durability
  • Water resistant construction
BESTSELLER NO. 9 in 2021

NWI NSLP500B Siteline Transit/Level Package

NWI NSLP500B Siteline Transit/Level Package
  • Siteline Transit/Level 20x, Builders Tripod and 9ft Grade Rod
  • 20x Magnification
  • Leveling Accuracy: 1/4 in at 100-Feet
  • Working Range 200ft
  • Includes carrying case, plumb bob & manual
BESTSELLER NO. 10 in 2021

NWI NCLP26 26x Contractors Automatic Level Package

NWI NCLP26 26x Contractors Automatic Level Package
  • 26x Automatic Level, Builders Tripod and 9ft Grade Rod
  • 26x Magnification
  • Leveling Accuracy: 1/16" at150ft
  • Working Range 300ft
  • Includes carrying case, plumb bob & manual

10 More Questions Answered

What is the least count of stadia rod?

What is stadia rod?
  • For small distances ( up to 100 meters) a level staff may be used for tacheometric surveying. But for greater distances stadia rod is needed. ...
  • The term stadia comes from the plural of the Greek stadion, the word for a distance of 185 to 192 metres (607-630 ft). ...
  • The least count of a leveling staff is 5 mm.

What is the range of auto level?

Specifications of Sokkia B20 / B30/ B40 Automatic LevelTELESCOPESokkia B20 LevelSokkia B30 Level
TypePendulum compensator with magnetic damping system
Setting Accuracy0.3 in.0.5 in.
Working Range±15 ft.±15ft.
CIRCULAR LEVELSokkia B20Sokkia B30

What is the least count of chain?

Metallic tags are fixed at various distinctive points of the chain to facilitate quick reading of a chain in surveying measurements. Metric chains are either 20m (or) 30m in length. One metre is divided into 5 links each of 0.2m. The least count of metric chain is 0.2m.

What is the principle of auto level?

The automatic level has a compensator mechanism that uses a combination of fixed prisms or mirrors and a moving prism suspended on a pendulum to give a horizontal reference. When correctly set up the compensator will ensure that the ray of light through the centre of the reticule is exactly horizontal.

What is Y level?

: a surveyor's level with a telescope supported in y-shaped rests and as a result capable of being rotated around its own axis or of being taken out of the supports and turned end for end for purposes of adjustment — compare dumpy level.

What is a dumpy?

1 : being short and thick in build : squat. 2 : shabby, dingy. Other Words from dumpy Synonyms Example Sentences Learn More about dumpy.

How is dumpy level calculated?

Benchmark information is usually written on the monuments supplied by the area you are surveying in. What is the formula to calculate height using a dumpy level? The formula to calculate height using a dumpy level is: Benchmark height + backsight measurement - foresight measurement.

How do I check my auto level level?

Checking Auto Level Accuracy
  • Set up instrument in an area that is as level as possible and which is about 220 feet long. ...
  • Take a reading on each rod with the instrument (or mark each piece of strapping where the crosshair is sighted).
  • Move transit to another spot on the line and take readings and mark both rods again.
  • How do you read a dumpy level staff?

    The staff reading is the reading on the staff at which the horizontal hair appears to cut the staff. A staff reading consists of 4 digits. The first digit represents the whole number of meters, the second digit represents decimeters, and the third, and fourth digits represent millimeters.

    What is the difference between theodolite and dumpy level?

    Answer. Answer: The dumpy level is an optical surveying leveling instrument consisting a telescope tube. The difference is that Dumpty level can be used only for vertical measurements while a theodolite functions in both horizontal and vertical measurements.