WYDC LVDT Straight Line Displacement Sensors
Model: WYDC/LVDT
Description:
The WYDC/LVDT differential transformer displacement sensor has good environmental adaptability. It is widely used to measure various physical quantities that can be changed into displacement in advance and to measure the mechanical quantities (such as tension, pressure, vibration, liquid level, etc.) that can be converted into displacement. Microelectronic technology is adopted in the amplifying circuit of the sensor
The Working Principle
The WYDC/LVDT differential transformer is a sensor that converts the linear displacement into a simulated voltage. Because of its structure as a whole, the durability and environment resistance are excellent, and the temperature range is -20 C ~120 C. Differential Transformer displacment sensot is made of a promary coil, a sesncendary coil and a movable core. Added fixed voltage and frequency of sine wave excitation on primary coil and secondary coil induces response voltage by moveable core.The output characteristics of two of the secondary coil and the excitation signal is a differential output with the frequency of the AC voltage. Through the detection circuit to be output DC voltage displacement. The detection circuit consists of a rectifier diode and a RC filter. The measurement range is a moving travel of a movable iron core, which is usually from a number of +mm to hundreds of mm. When the moving iron core is in the center position, the output voltage is 0 V: the positive and negative voltage, which is proportional to the moving distance, is produced when the movement is left and right. The linearity is less than 1% and the detection precision is m. The error increases when it exceeds the prescribed travel.
Features:
No active contact, high reliability and long life;
The resolution is high and the sensitivity is good.
High linearity and good repeatability.
Wide range of measurement (low resolution when measuring range is wide)
External Size and Technical Parameter
|
Spec
|
Measure Range（mm)
|
A(mm)
|
L（mm)
|
△L（mm）
|
D(mm)
|
E(mm)
|
|
MIN
|
MAX
|
|
5L、2.5D
|
5、±2.5
|
180
|
30
|
54
|
15
|
Φ26
|
M5
|
|
10L、5D
|
10、±5
|
180
|
30
|
80
|
15
|
Φ26
|
M5
|
|
20L、10D
|
20、±10
|
180
|
30
|
95
|
15
|
Φ26
|
M5
|
|
30L、15D
|
30、±15
|
180
|
30
|
111
|
15
|
Φ26
|
M5
|
|
50L、25D
|
50、±25
|
230
|
30
|
155
|
15
|
Φ26
|
M5
|
|
100L、50D
|
100、±50
|
280
|
30
|
205
|
15
|
Φ26
|
M5
|
|
150L、75D
|
150、±75
|
380
|
30
|
265
|
15
|
Φ26
|
M5
|
|
200L、100D
|
200、±100
|
400
|
30
|
321
|
15
|
Φ26
|
M5
|
|
300L、150D
|
300、±150
|
540
|
30
|
485
|
15
|
Φ26
|
M5
|
|
400L、200D
|
400、±200
|
670
|
30
|
644
|
15
|
Φ26
|
M5
|
|
500L、250D
|
500、±250
|
830
|
50
|
749
|
15
|
Φ26
|
M5
|
|
Comprehensive Accuracy
|
0.25％、0.5％、1％F·S
|
|
Output Signals
|
4～20mA、0～5 or 0～±5V、0～±10V
|
|
Power Voltage
|
12V、15V、24VDC（standard）
|
|
Working temperature
|
-10～60℃
|
|
Zero Shift
|
0.01％/℃
|
|
Sensitivity Drift
|
0.05％/℃
|
|
Dynamic Frequency
|
0～200Hz
|
| |
|
|
|
|
|
|
|
|
Note: * L means unidirectional, D means bidirectional. *
Transmitter connecting the outsude by cable or connection box;
|
Wire color
|
Terminal
|
Connection
|
|
Red
|
1
|
V+
|
|
Yellow
|
2
|
V-/GND
|
|
Blue
|
3
|
OUT+
|
a). Electric connection for transmitter with 3 -wire 4～20mADC output:
Reminders when choose models
1. Pay attention to media which is measured is compatible with part of product
2. Anti-exposion products don't have LCD or LED dial
3. Order temperature transmitter with LCD or LED dial, the power voltage shouldn't be less than 20VDC
4. In order to keep stable performance, we suggest user to install lightning protection device
5. If there is strong vibration, strong electromagnetic, RFI, please state before order and indicate in order.
Order Guide
|
Code
|
Explanation
|
|
Model
|
WYDC/LVDT
|
Straight Line Displacement Sensors
|
|
|
Linear Travel
|
X
|
Unit: MM For example: 50MM,100MM
|
|
|
One way
|
L
|
Zero at one side, For example: 10L means 0-10MM
|
|
|
Two way
|
D
|
Zero at center, For example:10D means ±10MM
|
|
|
Accuracy
|
1
|
0.5%
|
|
|
2
|
0.3%
|
|
|
3
|
0.25%
|
|
|
4
|
1%
|
|
|
Output
|
I
|
4-20mA
|
|
|
V1
|
0-5V
|
|
|
V2
|
0-10V
|
|
|
V3
|
±5V
|
|
|
V4
|
±10V
|
|
|
Connection
|
3
|
3 wire：power+ power- output
|
|
|
4
|
4 wire：power+ power- output+ output-
|
|
|
Power supply
|
G1
|
24VDC
|
|
|
G2
|
12VDC
|
|
|
Shell Diameter
|
K1
|
Φ26MM
|
|
|
K2
|
Φ20MM
|
|
|
Zero
|
A
|
Zero at outside:meauring bar is outside,output 4mA or 0V
|
|
|
B
|
Zero at inside: meauring bar is outside,output 20mA or 5V
|
|
|
Measuring bar form
|
1
|
Free slid
|
|
|
2
|
Spring back
|
|
|
Probe
|
1
|
M5 thread
|
|
|
2
|
Ball contact tip
|
|
|
Shell form
|
Y
|
All-in-one
|
|
|
|
F
|
Split
|
|
|
N
|
Np specific
|
|
|
T
|
Specific
|
|
|
Cable length
|
X
|
Unit:M standard:2M
|
bio-equip.cn
Xian Chuangjin Electronic technology Co., LTD founded in year of 2013 is professional in researching and providing a series of Pressure/Level/Temperature Transmitter,Sensor,Switch Controller,Flow Meter, Density Meter,Vibration Wire Piesometer,MINI Osmometer,Earth Pressure Cell,Dynamic Strain Amplifier.We offer ODM and OEM service and own ISO9001:2000 Certificate.Pressure Transmitters and Temperature Transmitters are granted CE certificate.
These products are also widely used in aeronautical and space,waterway,navigation,petrochemical industry,irrigation works,electric power,coal metallurgy,water supply,natural gas supply,steam and warm supply,medicine and bioengineering etc and scientific research institutions.
When there's no standard product to fit your application or cost requirements, simply talk to us about your requirements,both technical and budgetary,and we’ll develop your customer solution, including power supplies, measurement range,output,port type etc,then fully test the system prior to supplying it to you on time,complete and ready to install.Welcome customer from domestic and abroad to inquiry.
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