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 env ironment 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 Rangeï¼?mm) A(mm) Lï¼?mm) â?³Lï¼?mmï¼? 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 0.25ï¼?ã?�0.5ï¼?ã?�1ï¼?Fâ?¢S
Output Signals 4�20mA�0�5 or 0�±5V�0�±10V
Power Voltage 12Vã?�15Vã?�24VDCï¼?standardï¼?
Working temperature -10ï½?60â??
Zero Shift 0.01ï¼?/â??
Sensitivity Drift 0.05ï¼?/â??
Dynamic Frequency 0ï½?200Hz
Note: * L means unidirectional, D means bidirectional. *