A laser distance measurer, or a laser rangefinder, is an electronic device used for measuring (or determining) distances quickly and accurately. Most laser distance measurers use AA and AAA batteries, but there are models with Lithium Ion batteries, and these measuring devices are capable to run much longer. The laser distance measurers are most commonly used by general builders, construction workers, surveyors, real estate agents, renovators and do-it-yourself workers. These compact and hand-held devices are designed to perform accurate measurements without the help of a flat surface or another object.
A standard laser distance measurer has a capacity to measure about 50m, while the newer models have capacity of measuring over 150m. Some highly advanced models are capable to compute area and volume measurements by taking multiple distance values into account. The laser distance measurer includes many other features, such as memory, continuous measurement and tilt sensors. The memory feature allows you to store particular measurements for future use, the continuous measurement provides a varying reading as you move the measurer around, and the tilt sensors tell you the degree of incline so you can keep the measure level accurately. A laser distance measurer with tilt sensors has a pythagoras functionality, which allows you to measure heights when standing at certain target point.
The working principle of the laser distance measurer is quite simple. You simply need to hold the device with one hand and to aim it towards the end object or surface. This electronic device measures the time the laser beams travel towards the object and back to the receiver of the measurer. Since the speed of light is constant, this device can determine the distance by measuring how long the laser beams travel from the device to the end object and back to the device. The laser rangefinder performs these calculations easily, and the final results are presented in meters, most commonly with 3 decimal places. For increased accuracy, look for a more expensive model that provides measurements in millimeters.
When purchasing a laser distance measurer, it is very important to consider the hardiness and the working conditions. These devices vary significantly in terms of hardiness, while the working conditions must be suitable for maximum efficiency. In other words, if the measurer is built to last, it is able to make accurate measurements in rigorous working outdoor environments.
Since lasers bring many threats, the laser distance measurers are included in class 1 laser devices. The laser beams of the measurer are not dangerous for the eye retina, but it is recommended to avoid pointing a laser distance measurer towards people.
