S-DW Axial displacement sensorDetailed product description：

S-DW axial displacement sensor

The S-DW axial displacement sensor is composed of a preamplifier and an eddy current probe, and is a non-contact linearized sensing system. Eddy current sensors are mainly used to measure the static and dynamic distance between the probe and the object being measured. The object being measured is generally ferrite, and the alternating electromagnetic field of the probe is absorbed by the ferrite. The electronic circuit of the sensor senses and processes this change, thereby obtaining the displacement of the object being measured. It has the advantages of good long-term reliability, wide measurement range, high sensitivity, high resolution, fast response speed, strong anti-interference ability, and is not affected by oil and other media. Therefore, it has been widely used in online status monitoring and fault diagnosis of large rotating machinery.
Application of eddy current sensors:
Axial position measurement: It can indicate the wear of thrust bearings or the potential for bearing failure.
Radial vibration measurement: It can indicate the working condition of bearings and measure mechanical faults such as rotor imbalance, misalignment, and shaft cracks.
The average radial position of the shaft inside the bearing: it can be used to determine the azimuth angle, and it is also an indicator of whether the speed is stable and whether the shaft is aligned.
Keyphasor signal: It is used to measure the rotational speed and phase angle of the shaft.
Eccentricity: For large and small turbine machinery, the bending of the shaft, i.e. eccentricity, needs to be measured during startup.

Technical Specifications:

Probe diameter (mm)	Ф8	Ф11	Ф16	Ф18	Ф25	Ф32	Ф40
Linear range (mm)	two	four	six	eight	fourteen point five	eighteen	twenty-two
Sensitivity (v/mm)	eight	four	two	two	one	zero point eight	zero point six
Working temperature range	Probe (℃)	-40 ~ 150
	Extension cable (℃)	-40 ~ 150
	Pre processor (℃)	-30 ~ 70
Linear error (%)	＜ 1	＜ 1	＜ 1	＜ 1	＜ 1.5	＜ 1.5	＜ 1.5
frequency response	0 ~ 5 KHz
Power supply	-24VDC or+24VDC can be designed with operating voltage according to user needs
Output current	4-20mA load ＜ 500 Ω
Sensor resistance	2-10 Ω (usually 5.4 Ω)
Maximum output voltage	Approximately -22VDC (when powered by a -24VDC power supply)
Power consumption	＜ 20 mA
Probe cable length	1 m
System cable length	Probe cable length+extension cable=5m ± 10% or 9m ± 10%
Installation thread (M)	M10×1	M14×1.5	M20×1.5	M22×1.5	M30×1.5 M22×1.5	M36×1.5 M22×1.5	M22×1.5

Note: The above parameters are obtained using a -24VDC power supply and 45 # steel thickness ≥ 5mm as the measured object at 25 ℃.
Sensor structure diagram:

Purchasing Guide:

Purchase code S-DW-A □□□□ - B □□□ - C □□□ - D □□□
Probe diameter A □□□: 008 (8mm sensor) 011 * (11mm sensor) 018 (18mm sensor) 108 (8mm sensor with measuring rod)
Screw tube length B □□: 01-40mm; 02 * -60mm; 03-80mm (or customized by the user)
Cable length C □□: 01 * -5m; 02-8m
Cable Armor D □□: 01- With Armor; 02 * - Without armor