TRI COUNTY DRAFTING SUPPLIES: BACK TO SCHOOL DRFTG TABLES 30% OFF

tricountytransit@yahoo.com

CLICK FOR TOP QUALITY ROTATING LASER LEVELS

AGL MACHINE
CONTROL RECEIVERS

PIPE LASER

www.tricountytransit.com
Tri County Transit & Drafting Supply is located in Asheville, NC.    We are proud to be dealers for the leading manufacturers of
construction Rotary lasers, instruments, and drafting supplies. We have been in business for thirty five years and have seen our industry go from
open face transits for survevors to the total stations in use today, and from drafting with pencils to computer aided drafting.

We are dealers for Alvin Drafting Supplies,
AGL Rotating Lasers,    AGL has been focused from the beginning in supplying construction customers with precision control methods that
enhance profitability, are tough, reliable and simple to use. "TOTAL VALUE" for the customer is the sum of (a) initial purchase price, (b) operating
cost-maintenance during the life of the product, and (c) cost to set up and use the product each and every day. We develop "CUSTOMERS FOR
LIFE" by providing the best "TOTAL VALUE" control systems.
"CUSTOMER FOR LIFE" is not a slogan at AGL but our way of life. Satisfied customers keep AGL in business. We appreciate and are thankful
to every one of the customers who trust in AGL products and are successful using them.
AGL Rotary Lasers are tough, reliable and simple to use. Very precise, repeatable self-leveling (±8 arc seconds).It's also
stable over a broad temperature range. One-Touch electronic leveling speeds setup. It's totally automatic: just mount it on a tripod, turn it on, and
it's ready to go. H.I. Warning shuts the laser off automatically if it’s disturbed, preventing inaccurate readings.
Windy Mode Allows continuous operation during high winds, vibrations and shocks. Slight movements are ignored and the Rotary laser
self-levels only if significant movement occurs.

AGL EAGL 1-Touch ROTATING LASER, AGL EAGLE #2000 ROTARY LASER, EAGL 3000 ROTARY LASER,
LT200 AGATEC ROTARY LASER,   AGATEC LT300 ROTATING LASER, GL2700 GRADELIGHT Pipe Laser, all AGL
Rotating laser Levels are Water and dust resistant:

Pro Shot Rotary Lasers, Pro Shot Rotary Laser Levels give you one person grade checking and elevation control. We have construction
lasers for grading, concrete forms, elevation control, land leveling, underground utilities, drop ceilings, and many other applications. Laser levels
make you a one person leveling crew. Pro Shot Rotating Laser Levels are precision instruments that provide speed and accuracy on the job.
Pro Shot Construction rotary lasers combine the most desirable features, durability, and accuracy at the best price on the market.

Northwest Instrument co, NORTHWEST INSTRUMENT, INC. (NWI) applies advanced technologies of electronic compensation,
optical-electronic sensing, and servo automation in its wide array of products, including self-leveling Rotary lasers, automatic levels,
theodolite's, and total stations, NRL200 ROTATING LASER,

CST Berger,   CST/berger is very excited and proud to announce that we are now part of Robert Bosch Tool Corporation. This combination of
Bosch and CST brands complement each other in providing the widest range of measuring and leveling tools such as Rotating Lasers,
Transit levels, Automatic Levels, Total Stations, Tripods, Level Rods, Machine Control Receiver, Bullseye "3"
Machine Control Laser Receiver, Electronic Theodolite, Rotary laser, Rotating Laser Level, David White
Level Transit, Berger Rotary Lasers, Tapes and other field supplies to meet our customer's need.

David White Instruments,   Rotating Lasers, Level transits, Digital Theodolite's, Total Stations, Rotary Laser.
Other suppliers include Pentax,   Omni Survey,   Crain Level Rods,   and   Presco Flagging Tape among others..

We offer Rotating Laser levels, Pipe Lasers, Automatic Levels, Transit Levels, Total Stations, Digital
Theodolite's, Automatic Rotary lasers, Wood Tripods, Aluminum Tripods, Survey Prisms, Prism Poles, Fiberglass Rods,
Aluminum Rods, Tribrachs, Tribrach Adapters, Nylon Coated Steel Tapes, Fiberglass Tapes, Hand Levels, ABNEY Levels, Laser level,   and
all field supplies and equipment for Builders, Contractors, and Surveyors.

Drafting Supplies
Drafting Vellum, Plotter Paper,   Drafting Instruments, Drafting Furniture, Drawing Files, Drawing Tools,
Triangles, Adjustable Triangles, Drafting Templates, Curves, Bow Compasses, Vellum Pads, Sketch Pads,
Drafting tables, Architect Scale, Engineer Scale, Drawing Kits, Beam Compass, Roll Files, Mailing Tubes,
Portfolios, Drafting Tape, Prismacolor Art Markers, Electric Eraser, Drawing Leads, Easels, Planhold Hanging
Files, Drafting Lamps, Stainless Steel T-Square, Clear Edge T-Square, Parallel Bar, Vinyl Board Cover,
for Architects, engineers, and Draftsmen

Tri County offers a complete line of products at reasonable prices to meet all of your needs. Thank you for visiting our website and we look
forward to being of assistance to you.

                                       THE RIGHT TOOL FOR EVERY JOB.

Rotary
Lasers

Total Station

Auto Levels

Level Transit

Drafting
Table

DRAFTING SUPPLIES

CHOOSING THE RIGHT ROTARY LASER LEVEL FOR YOUR NEEDS
Accuracy          With the Rotary laser set to level or grade, at a given distance, how far from perfection will the
laser beam be. Usually expressed as plus or minus a fraction of an inch at 100 feet. (Or ±Xmm at 30m) Accuracy
may also be expressed in terms of arc seconds. 10 Arc Seconds translates to ±1/16" at 100'. (±1.6mm at 30M.)
Accuracy decreases with distance from the laser. If the accuracy of a laser is ±1/16" per 100 feet, it will be ±1/8"
at 200 feet.
Arc Second         A circle can be divided into 360 degrees. Each degree is divided into 60 arc minutes, and
each arc minute is divided into 60 arc seconds.
Automatic Leveling         Automatic Leveling and Self Leveling are used synonymously. The major types
of self leveling systems are servo motor and compensated. In the servo motor system, electronic level sensors send
information to a processor, which activates motors that drive the unit to level. A compensator is a gravity based
pendulum mechanism. Servo systems have a much greater self leveling range than compensated systems. In a
compensated system, the user turns leveling screws to center a level vial. Once the unit is rough leveled, the
compensator maintains the beam at its specified accuracy. When using a servo system, the user mounts the laser on
a tripod, turns on the power, and waits for the unit to drive itself to level.
Compensator         Gravity type mechanism, usually some type of pendulum system to insure that laser beam
is level. Compensators may be wire or bearing hung.
Deadband         Usually applied to a receiver. This is the distance that a receiver can be moved and still give an on
grade reading. If the deadband is too fine, it becomes difficult to get an on grade reading, if the deadband is too
wide, it becomes difficult to maintain accuracy.
Grade Capability         The range of slope that can be dialed into the laser. Expressed as percent of slope.
Laser Diode         Solid state device that produces laser light. Light can be visible or invisible. Construction lasers
use one of three wavelengths. They are infra-red (invisible, 780nm), red (650 or 635nm), and green (532nm).
Laser         Acronym for Light Amplification by Stimulated Emission of Radiation
Manual Leveling         The Rotary laser is kept level through the use of glass level vials. The user must check these
vials periodically, because the level bubbles may move during the day, in response to vibrations and changes in
temperature.
Operating Range         The maximum distance from the Rotary laser where the detector will still function. Usually
given in terms of an operating radius or diameter.
Penta Mirror or Penta Prism         Device that reflects a light beam outward at a 90º angle in relation to the
incoming beam
Rotational Coverage         The circle of working coverage around the laser. Most lasers offer a full 360º circle of
coverage.
Self Leveling         The Rotary laser is leveled either with a compensator, or with an electronic servo motor system.
If the Rotary laser is disturbed or goes out of level, the mechanism will make a correction. If the mechanism cannot
bring the laser back to level, it shuts the laser off.
Self Leveling Range         Expressed as ± x number of degrees or arc minutes. This figure denotes how far the laser
can be tilted, while still maintaining its ability to self level.

LASER INFO
Terminology
Choosing a Laser
Safety
Calibration

TRI COUNTY TRANSIT AND DRAFTING SUPPLIES

PO BOX 8266 - ASHEVILLE, NC PH 828-367-3570

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