What is the most important spec on a laser level?

Accuracy — how tightly the laser holds a true plane, stated as ± inches over a distance (e.g. ±1/16" at 100 ft). Lower is tighter. For grade and foundation work it matters more than range, RPM, or beam color.

What is the difference between single grade and dual grade?

A single-grade laser holds one slope on one axis. A dual-grade (dual-slope) laser holds two independent slopes at once (X and Y), which is required for crowned roads, complex parking lots, and compound pad grades.

Do I need a laser receiver outdoors?

Yes. Outdoors you generally cannot see the beam in daylight, so a receiver (detector) catches it and tells you on-grade, high, or low. Beam color barely matters outdoors because you read the receiver, not the beam.

What IP rating should a jobsite laser have?

Look for IP66 or better. The two digits cover dust and water resistance — IP66 means dust-tight and able to take strong water jets, which is what a laser needs to survive a real jobsite.

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Laser & Survey Terminology

The spec sheet, in plain English. Know exactly what you're reading before you buy — and what actually matters for your work.

Every term below maps to gear we carry and ship free across the United States — rotary, grade & pipe lasers, receivers, and accessories.

A–C

Accuracy: How close the laser holds a true level or grade plane, usually stated as ± inches over a distance (e.g. ±1/16" at 100 ft). Lower numbers are tighter. The single most important spec for grade work.
Automatic / Self-Leveling: The laser levels itself within a set range (typically ±5°) using internal pendulums or servo motors, then locks. If knocked out of range it warns you instead of giving a false reading.
Beam (Red vs. Green): Green beams are ~4× more visible to the human eye than red, useful for interior and bright conditions. Red beams cost less and draw less battery. Outdoors, most crews use a receiver and beam color barely matters.
Calibration: Verifying and adjusting the laser so its plane reads true. Should be checked periodically and after any hard drop. A drifted laser silently puts your whole grade off. Calibration & maintenance →
Cone Grade: A laser mode that creates a sloping plane radiating from a center point — used for parking lots, pads, and drainage that pitch toward or away from a point.

D–G

Dial-In Grade: Entering a precise slope (e.g. 1.250%) on the laser so the beam plane tilts to that exact grade. Dual-grade units dial in two axes independently.
Dual Grade (Dual Slope): A laser that holds two independent slopes at once (X and Y axis) — required for crowned roads, complex parking lots, and compound pad grades. Shop grade lasers →
Grade: The slope of a surface, expressed as a percent (%) or ratio. "Setting grade" means establishing that slope reference across the site.
Grade Rod: A graduated measuring rod the receiver mounts to. You read elevation off the rod where the receiver catches the beam. Rods & accessories →

H–N

Handheld Receiver: A detector the operator holds (clamped to a rod) that beeps and shows arrows when it catches the laser beam — used for grade-checking by hand. Laser receivers →
IP Rating: Ingress Protection — two digits for dust and water resistance (e.g. IP66 = dust-tight + strong water jets). Jobsite lasers should be IP66 or better.
Machine Receiver / Display: A receiver mounted on a mast on a dozer, grader, or excavator that shows the operator on/off grade in the cab. Larger reception window than handheld units. Machine display receivers →
Manual / Fixed Grade: A laser that lets you tilt the plane by hand without auto-leveling that axis — older or simpler grade workflow.

P–S

Pipe Laser: A laser built to sit in or over a pipe and project a beam down the invert at a set grade for sewer, storm, and utility work — sealed against trench water and dust. Shop pipe lasers →
Plumb / Plumb Beam: A vertical down/up beam for transferring points and setting vertical reference (columns, walls, layout).
Rotary Laser: A laser that spins a beam 360° to create a level (or sloped) reference plane across an entire site — the workhorse for site prep, foundations, and grading. Shop rotary lasers →
RPM / Rotation Speed: How fast the head spins. Higher RPM gives a brighter apparent line for interior visual use; with a receiver, RPM barely matters.
Self-Leveling Range: The maximum out-of-level the laser can correct for automatically (e.g. ±5°). Set the tripod roughly level and the laser does the rest.
Slope: See Grade. Often used interchangeably; "single slope" = one axis, "dual slope" = two.

T–Z

Tripod: The leg stand the laser mounts to. Flat-head and dome-head (5/8"-11) variants exist; match the mount to your laser and rod system. Tripods & accessories →
Working Diameter / Range: The usable radius/diameter the laser + receiver can operate over (e.g. 2,600 ft diameter). Stated with a receiver, not naked-eye.
Vial: A bubble level used to roughly level a manual instrument or check setup before relying on the laser.

Common Questions

What is the most important spec on a laser level?: Accuracy — how tightly the laser holds a true plane, stated as ± inches over a distance (e.g. ±1/16" at 100 ft). Lower is tighter. For grade and foundation work it matters more than range, RPM, or beam color.
What is the difference between single grade and dual grade?: A single-grade laser holds one slope on one axis. A dual-grade (dual-slope) laser holds two independent slopes at once (X and Y), which is required for crowned roads, complex parking lots, and compound pad grades.
Do I need a laser receiver outdoors?: Yes. Outdoors you generally cannot see the beam in daylight, so a receiver (detector) catches it and tells you on-grade, high, or low. Beam color barely matters outdoors because you read the receiver, not the beam.
What IP rating should a jobsite laser have?: Look for IP66 or better. The two digits cover dust and water resistance — IP66 means dust-tight and able to take strong water jets, which is what a laser needs to survive a real jobsite.

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Laser & Survey Terminology

A–C

D–G

H–N

P–S

T–Z

Common Questions

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