Slope /grade lasers come in two basic types: single and dual slope with options for adjustment. The single slope laser gives you a read on a slope one axis at a time. The dual slope laser has the ability to give you a read on two slopes on separate axis at the same time, which allows you the possibility of coming up with a compound grade. How you adjust the grade on your slope laser depends on how it is designed. For a manual grade slope laser, you have to figure out what the grade is to be and set your detector and rod to that grade, then manually move the beam up or down until your detector comes on to center. An automatic lasers eliminates a lot of that work, and then there are semi-automatic slope lasers that automatically adjust some of the functions. Here are some models to consider:
A good basic slope grade laser, like the semi-automatic Leica Single Grade Laser Rugby, has a high impact, glass filled housing, a solid metal base and it is 100% waterproof, for assured durability. It has an LCD grade readout and a bump alert that alerts you if the laser has been moved or bumped out of position, so as to avoid an error in your reading. It includes a beam masking feature, which turns off the laser diode on up to three sides to prevent unwanted disturbances. It has a user friendly menu. The star button opens the menu and allows you to enter changes. You select the axis, then press Up or Down to enter the required grade.
For remote control convenience, consider the Spectra Precision Laser GL412 (single grade) and GL422 (dual grade) transmitters. They are automatic self-leveling lasers that offer three functions in one piece of economical equipment: level, grade and vertical alignment with plumb. They both feature a 2-way, remote control with a built-in back-lit grade display which gives you access to all the functions on the laser keypad from up to 330 feet away. The ability to make grade changes from anywhere on the job greatly reduces setup time and speeds operation, especially when multiple job grade breaks are needed. Both units also incorporate automatic temperature and grade compensation for high accuracy in any weather or location. The beam is also kept precise by eliminating interference; it can be turned off electronically on on up to 3 sides of your choice.
Wireless technology gives the Trimble Spectra GL512 and 522 Grade Lasers greater grade matching capability, on top of all the functions of the GL400 series lasers. Wireless communication between the HL750 Laserometer and the transmitters provide automatic Grade Matching. Grade Matching allows measurement of unknown grade values between two points. It also has special features to eliminate This eliminates errors induced by environmental factors. PlaneLok automatically locks the beam on the receiver and keeps it on grade. Electronic Leveling Vibration Filter dampens vibrations in high winds or on high vibration jobsites. The casing is rugged enough to withstand a 3 foot drop on concrete.
The Trimble Spectra GL700 Series offers the most innovative collection of features for faster and more accurate reads on grades- Long-range Remote Control, PlaneLok, Grade Matching and
Automatic Axis Alignment. With the powerful, long-range remote control option it only takes one person to accurately set up and operate the grade laser. Even grade reverse is done in an instant. Complex alignments are automatic and virtually foolproof. You can even automatically control all the transmitter functions from inside the cab of a machine. Each unit comes with a laser receiver standard, your choice of power options, and the best service and support in the industry. Choose from economical, single grade to advanced, steep grade laser transmitters.
Topcon’s RL-100 Series provides single slopes from –5% to up to +25% in X or Y axis and comes complete with Topcon’s new LS-80B laser receiver, sensor holder, batteries, and a hard shell carrying case, so it’s ready to get to work as soon as you are. It is a fully automatic self-leveling laser with a range up to 2,500 feet, 5 arc second repeatability, a graphical display, and extra long battery life.
For the combination of versatility with ease of use, consider the AGATEC 11-0349 A710GC Split Beam Electronic Dual Grade Self Leveling Rotary Laser Level with Z Axis Grade. Whether you need a standard horizontal laser, a grade laser, an interior laser, or as a alignment laser with digital grade, this one piece of equipment will do it. The AGATEC A710 GC is fully self leveling and simple to get started. Just set up on the tripod and press the power button. The AGATEC A710 GC will level itself within its 6 degree self leveling range and start spinning. You may then enter grades up to +/-10% (increments of 0.001%) in the X and Y axis for grade applications using the detachable IR/Radio remote control. The AGATEC A710 GC is accurate to 1/8"@100ft with a horizontal working range of 1000ft in diameter with the included SR200 laser detector. It is also tough enough to hold up to harsh conditions, guaranteed dustproof and waterproof.
The AGATEC MR240 machine sensor that accompanies the AGATE A710, provides the user with a laser sensor that can be mounted on the dipper arm of back hoes or excavators via the rare earth mounting magnets. Grade indications are visible via the bright crisp LED lights indicating above, below and on grade signals. The AGATEC MR240 allows the machine operator to continue working as grade indications are directly visible to the operator from the cab of the machine. The AGATEC MR240 keeps co-workers out of the danger zones of heavy machines and allows them to be more productive on other areas of the job site.
Getting an accurate read on a slope is essential for surveyors and engineers who plan roads, concrete sections with run-off for sports fields, or parking garages and ramps with designed for conducive drainage. Accurate grade is also key to setting up sewer systems and storm drain pipes. Contractors also can benefit from grade lasers in site preparation, septic installation, trenching. and installing a driveway. Consider the range of functions you anticipate on your job site and get the grade laser that will work for you.
