Vernier Theodolites Catalogue Steel Axis 20/10 Sec

This is a Vernier Theodolite incorporating the famous Stanley solid 'U'or ‘V’ frame single casting design, where the support for the horizontal axis is cast in one piece. The instrument therefore features a vernier reading system for the horizontal and vertical circles instead of an optical micrometer system. The circles are equipped with magnifying glasses attached at opposite ends of each circle for more comfortable vernier reading
Specifications
Type of Theodolite
Vernier type
Accuracy
20 sec
Standard deviation
20’’ (direction deviation 5mm at 100m)
Lance
Coated lance(Special),
Case
Wooden box
Axis
Steel
Head & Screw
Plastic type
Meterial
Allumenium & brass
Magnification
30 X
Objective aperture
40 mm
ShortestLongest reading Staff
5500 foot
Length of telescope
7 inch
Stadia Line Ratio
1:100
Additive constant
0
Sensitivity of plate bubble
90-120’’
Sensitivity of vertical circle bubble
90-120
Weight (Wout Box)
6 Kg.
Condition
Good
Optical plummet
Magnification
2.5 X
Focusing Range
0.5 m -infinite
Vertical Circle & Horizontal Circle
(a) Graduation Of Circle
360
(b)Reading by Vernier
20" 10"
Used For
 Construction surveying
 Cadastral work
 Rail-roads
 highway alignments
Features
 High performance
 Robust construction
 Optimum quality
 Easy maintenance
 Longer working life
The instrument consists of
 A levelling base which supports the main working parts of the instrument and is capable of being screwed onto a tripod,
 A lower circular horizontal metal plate with a Germen silver vernier graduation,
 An upper circular horizontal plate,
 A vertical circle with vernier graduations.
 A telescope with an altitude bubble attached beside the vertical circle.