A rangefinder is a high-precision measurement tool used to measure the distance to a target. It has three types: laser rangefinder, ultrasonic rangefinder and infrared rangefinder. The most widely used rangefinder is the laser rangefinder. Let's take a look at the following.

Principle of rangefinder

The principle of laser range finder Optical range finder is a common type of range finder. Among them, hand-held laser range finder has high precision, small size and small measuring range, which is especially common and practical in the process of home improvement. The principle of the optical rangefinder is simply to calculate the distance D by measuring the time taken between the light and the target, and then combining the speed of light c=299792458m/s and the atmospheric refraction coefficient n. The specific calculation method is as follows: If the time required for light to travel back and forth between points A and B at a speed c is t, then the distance between points A and B is D=ct/2 where: D——the measuring point A , the distance between the two points B; c - the speed of light propagation in the atmosphere; t - the time required for the light to travel back and forth between A and B. Due to the fast speed of light, it is difficult to measure time directly, usually to measure the phase of the continuous wave, which is called a phase-measuring rangefinder. In addition, there are pulse-type rangefinders. Hand-held rangefinders commonly used in the construction industry are phase-measuring rangefinders.

How to use the rangefinder

How to use the handheld rangefinder: press the red measurement key for the first time - the laser shoots out; aim and then press the red measurement key - return to the result. It's that simple. Of course, there are also functions such as area, volume, maximum/minimum value, angle, Meterbox Bluetooth transmission, cloud storage, etc. You can understand it by reading the manual.

What brand of rangefinder is good

MaiCi laser rangefinder, a global precision measurement expert, has a variety of innovative laser rangefinders with extremely high cost performance both domestically and internationally. There are the world's thinnest and most fashionable, the world's highest protection level, the Chinese and English voice reporting, and the world's first intelligent operating platform, leading the price of laser rangefinders to plummet, and is known as an industry disruptor. All products implement a three-year warranty and lifetime cost maintenance.