具有长期工作可靠性好、测量范围宽、灵敏度高、分辨率高、响应速度快、抗干扰力强、不受油污等介质的影响等优点，因此广泛应用于电力、石油、化工、冶金等行业对汽轮机、水轮机、鼓风机、压缩机、齿轮箱、大型冷却泵等大型旋转机械的动态和静态非接触式位移测量。 
列如径向和轴向的轴位移、胀差、轴偏心、轴振动、键相、转速

The displacement sensor is a non-contact displacement sensor based on the principle of high frequency eddy current effect. The high frequency oscillating current produced in the preposition is flowing into the coil of the probe through a coaxial cable, and the coil will produce a high frequency electromagnetic field. When the measured metal body is near the coil, due to the effect of high frequency electromagnetic field, the induction current is produced on the metal surface, which is not only eddy current. The current produces an alternating magnetic field, which is opposite to the direction of the coil's magnetic field. The two magnetic fields superposition each other to change the impedance of the original coil. So the change of the distance between the probe and the surface of the measured metal body can be measured by the change of the impedance of the probe coil. The prefix output a DC voltage proportional to the distance according to the change of the impedance of the probe coil.

Static amplitude linearity
+ 2%
+ 5%
Dynamic amplitude linearity
+ 10%
Satic zero error
0.5%
Static amplitude stability
0.5%
Dynamic reference sensitivity error
3%
Static amplitude repeatability1%
frequency response
0 ~ 5KHz (0.5dB)
System temperature drift
0.1%
Point gap (mm) + 5% in the range of measurement
One point eight
Three
Nine
Point voltage (V) + 5% in measurement range
-10
-10
-7.08
Material, shape of the subject matter
Metal material, reference material is 45 steel, shaft, plane, shaft measuring plate
The diameter of the shaft is not less than (mm)
Eighty
The diameter of the measuring disc is not less than (mm)
Eighteen
Thirty
Seventy
Power supply voltage (V)
-20~26Vdc
Power consumption (mA)
TwelveTwelve
Fifteen
Output load
10K.
Ambient temperature in calibration
(20 + 5) C
storage
temperature
Proximitor
-35 C ~ +100 C
probe
-40 C ~ +177 C
Cable
-40 C ~ +177 C
Use
temperature
Proximitor
-30 C ~ +70 C
pobe
-40 C ~ +150 C
Cable
-40 C ~ +150 C
System total weight (standard configuration)
500g + 3%
700g + 3%
Total length of system cable is + 10%
5m or 9m
Extended cable length of + 5%
4m, 4.5m, 8m, 8.5m
The length of the probe cable is 5%
1m, 0.5m
Relative humidity (with joint protection, without immersion)
100% condensation
Altitude limit
<2000m
Normal working environment
No strong magnetic field, non corrosive vapour liquid, no strong vibration source
Dangerous working environment (DWQZi Series)
0, 1, 2 dangerous places of explosive gas mixture in class II A~ II C and T2~T5
Shell protection grade
Not less than IP20
Maximum surface temperature of the sensor shell
No more than 135 degrees centigrade.
insulation resistance
> 500M Omega
Insulation strength
> 500V