Speed meter, with full symbol indication, automatic measurement range, data hold, controllable type automatic shutdown, laser emission sampling function, sampling rate can be adjusted and other functions, can be used for measuring speed and counting. In different applications, the use of different types of instruments, in order to reduce the error of the use of the speed meter. Below small make up to introduce the category of the speed meter:

Speed meter, with full symbol indication, automatic measurement range, data hold, controllable type automatic shutdown, laser emission sampling function, sampling rate can be adjusted and other functions, can be used for measuring speed and counting. In different applications, the use of different types of instruments, in order to reduce the error of the use of the speed meter. Below small make up to introduce the category of the speed meter:

1, centrifugal speed meter

Using the balance of centrifugal force and pulling force to indicate the speed. Centrifugal speed meter is the most traditional speed measuring tool, is the use of centrifugal force principle of mechanical rotating speed instrument; measuring accuracy is generally in the 1~2 level, the general in place installation. An excellent centrifugal speed instrument not only has the characteristics of accurate and intuitive, but also has the advantages of reliable and durable. But the structure is more complex.

2, magnetic speed meter

The use of a rotating magnetic field in the metal cover cap generates a rotational force, rotating force and hairspring force balance to indicate speed. Magnetic tachometer is a model of successful use of magnetic, mechanical tachometer using magnetic principle; general on-site installation, with flexible short distance remote installation. Magnetic speed, because the structure is relatively simple, more commonly used in motorcycles and cars and other machinery and equipment. The remote installation of shaft damage.

3, the electric potential speed meter

Composed of small AC generators, cables, motors and magnetic head. Small AC generator to generate alternating current, AC transmission through the cable, drive small AC motor, small AC motor speed and the speed of the measured axis is consistent. The magnetic head speed and small AC motor is coaxially connected together, magnetic header indicating the speed is measured the rotation speed of the shaft; electric speed, remote installation is very convenient, good anti vibration performance, widely used in diesel engine and ship equipment.

4, magnetoelectric tachometer

Magnetoelectric sensor and a current meter, remote installation is very convenient.

5, flash type speed meter

According to the principle of the persistence of vision. Flash type tachometer, in addition to the detection speed (reciprocating speed), can also be observed again moving objects still, to understand the working state of mechanical equipment, is an indispensable tool for observation.