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Model L2DT Series

Model L2DT Series
Linear inductance-L Displacement Transducer
Model L2DT Series

L2DT series is a sensor of which inductance changes with displacement
of the copper sleeve covering a sensor probe.
The composition of a sensor probe is shown in the left figure.
10kHz sine wave excites the solenoid coil of the L2DT sensor.
It generates the short ring effect as a copper sleeve covers a
sensor probe.
The magnetic flux of the short ring effect makes decrease
inductance of solenoid coil.
When the copper sleeve covers the whole sensor probe,
the short ring effect is the strongest and the value of inductance
becomes the smallest.
Calculating the change of this inductance, it is possible to detect
the position of a copper sleeve.


Effective stroke100, 150, 200, 250, 300, 350, 400, 450, 500mm
Voltage output0-10V(load Min.2kΩ)
Current output4-20mA(load Max.500Ω)
Contact output2 points Open collector 0.1A 30VDC
Alarm outputOpen collector 0.1A 30VDC
(Cable disconnection and sleeve drop)
Non-linearity±0.5%FS TYP
Temp. drif±500ppmFS/°C(sensor)
Drive freq.10kHz
Freq. response100Hz
Power supply+24VDC 150mA
Operating temp.-40°C-+150°C(sensor)
Storage temp.-40°C-+150°C(sensor)
Max. Pressure21MPa(sensor rod)
Shock100G 6ms(sensor)
IP gradeIP67(sensor)
Cable1m(Standard)(Option Max.20m)

Please use the cable as specified on order.
The cable extend and cut needs the readjustment in the factory.
In case you connect cable, you are to connect braided wire correctly.

Model No.

①Effective stroke
 100, 150, 200, 250, 300, 350, 400, 450, 500mm

②Pigtail cable length
 unit of order:meter

③Total cable length
 unit of order:meter(Max.20m)
 (Pigtail cable②+Extension cable⑥)


⑤Direction of output(toward probe tip)
 D:output increase
 R:output decrease

⑥Extension cable length
 unit of order:meter


sensor controller connction 
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・Material;sensor head:Nickel-plated brass、rod:SS304
・Cable;0.3sq×2 heat-resistant shielded cable、diameter Φ5.6、sheath silicon rubber

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