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Levels are great for a variety of tasks revolving around the requirement for
establishing planes which are orthogonal to the gravity vector. These
instruments are optimized for easy leveling of the line of sight at any azimuth
position.
Quality
Our levels enjoy the same reputation for producing quality results on the job as do
our transits. Made entirely in the USA, our levels are
fabricated using stainless steel, bronze, brass, and fine optics, all held to exacting
tolerances. These instruments provide you with:
- Precision elevation measurement (± 0.001")
- Tremendous flexibility and reliability in various applications and environments
- Quick setup and measurement time
- Easy operation
- Both survey and build operations
- Rugged construction
- On-site calibration capability
Variety of applications
You came to the right place if you want to measure deviation from level using the
precision of optical methods and the ease of a simple technology. Use the
545-190 to establish a line of sight which is dead
level (within ±1 arcsecond). Then use the optical micrometer on the instrument to
measure the deviation of any object from this optical line
to within ±0.001". Our optical tooling scales
are the perfect complement for this measurement technology, extending the
"reach" of the optical reference line to almost any distance
required. This instrument is great for a number of applications,
such as:
- Leveling machine bases
- Evaluating structural or machinery foundations
- Assessing machine tool ways and table movement
- Checking level of rolls and rolling machinery for plastics, steel,
paper, & printing operations
- Checking or setting of sole plates
- Substituting for an alignment telescope when outfitted with a coordinate
optical micrometer (see picture above) to perform alignments on engine bores, bearing
journals, etc.
- Substituting for a transit when holding a horizontal reference line
- Collimating against mirrors (ex., spindle mirrors on
driveshafts or gearboxes)
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Precision leveling
Of course, the "magic" of our
levels is how they can so easily and reliably create a precisely level optical
line of sight. How is this possible? In use, a bull's eye bubble is
provided for rough leveling, accomplished using the leveling screws in the base.
Then, a fine-motion screw near the eyepiece end of the telescope subtly tilts
the telescope on precision bearings to bring the line of sight to dead-level.
This is accomplished by using a coincidence-type level vial system (see photo)
with 2½X magnification.
Both ends of the precision level vial's bubble are optically "folded" and brought
together, side-by-side, using a mirror path. This enables you to detect
the tiniest deviation from level. The human eye is very good at evaluating
coincident patterns such as the one created by our precision vial assembly, and
one arcsecond of tilt is easily discernible using this "coincident"
methodology. It's simple and very effective.
Field Calibration
These instruments can be calibrated and adjusted on-site. This gives you the
power to confirm the instrument’s optical and mechanical relationships, which are
crucial for accurate use. For example, performance of a "peg test", using
optical tooling scales held in place by magnetic scale holders in the work area, allows you
to determine how accurately the precision level vial is adjusted (parallel to the line of sight).
Autocollimation Capabilities
Our levels are fully capable of performing collimation, autocollimation, and reticle
projection, given the correct eyepiece and lighting accessory. For a more in-depth
look at optical tooling instruments, principles, and applications, visit our
Learning Center.
Telescope
Each level has telescope adjustments which will maintain a straight line of sight
throughout the focusing range. This straightness is maintained at
± 0.001" at near focus range, and within one arcsecond from 17 feet to
infinity.
 The eyepiece end of the telescope tube has a removable section to
facilitate conversion to autocollimation and/or autoprojection capabilities,
as mentioned above, or the installation of a right angle eyepiece. The objective end of the
telescope barrel is machined so you can mount an optical micrometer.
The reticle used in our levels is the standard optical tooling filar/bifilar design.
This design makes our optical tooling scales easy to read at various distances, and is
designed specifically for performing optical techniques such as autocollimation
and autoreflection.
Base
The vertical spindle in the base of our levels is a proprietary ball bearing
design of our own manufacture. Four dust-shielded leveling screws with 1½"
knurled heads and a 3/8" x 32 thread allow for rough leveling of the
instrument. This type of four-screw leveling system puts the pitch axis
coincident with the roll axis, and does not change the height of
the instrument as adjustments are made. Errors of this nature frequently occur with
instruments having three leveling screws, and those having a tilt axis not coincident with the
azimuth axis. The base mounting plate is made of cast bronze with a standard
3½" x 8 internal thread.
Finish
The 545 Series levels are painted with a high quality, two-part, textured
gray polyurethane enamel coating.
Have a look at our Precision Sight Level.
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