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Linear Variable Inductive
Transducers for Position
Sensing (Heavy-Duty)
0 to 10V Output with 12 to 30V Input
4 to 20 mA (3-Wire) Output with
18 to 30V Input
LDI-127 and LDI-128 Series
LDI-127-150-A010A
shown smaller than
actual size.
The LDI-127/LDI-128 Series LVIT (Linear Variable
Inductive Transducer) position sensors from
Omega are contactless devices designed for factory
automation and a variety of industrial and commercial
applications such as solar cell positioners, wind turbine
prop pitch and brakes, chute or gate positions on
off-road or agri-vehicles and packing equipment.
With their compact device, superior performance,
and excellent stroke-to-length ratio, the LDI-127/
LDI-128 sensors are ideal for both industrial testing,
laboratories, and in-plant or mobile equipment
OEM applications.
LDI-127/LDI-128 sensors are offered in 10 full scale
ranges from 25 to 450 mm (1 to 18"). Operating from
a variety of DC voltages, these sensors offer a choice
of outputs and all include the Field Programmability
calibration feature. LDI-127/LDI-128 models come with
radial exiting cable and two swivel rod eye ends for
easy installation.
The LDI series also includes a smaller body version,
the LDI-119, for those applications not requiring a
heavy-duty unit.
U Heavy-Duty, Long Lasting,
Contactless Device
U Excellent Stroke-to-Length Ratio
U 27 mm (1.05") Diameter Anodized
Aluminum Housing Sealed to IP67
U Wide Choice of Range: 25 to 450 mm
(1 to 18") Full Scale
U High Accuracy with Low
Linearity Error
U Radial Cable Exit with Swivel Rod
Eye Ends
U Designed to Operate Under Adverse
Temperature, Vibration, Shock, and
Humidity Conditions
Specifications
Analog I/Os:
0 to 10V output with 12 to 30V input, 35 mA max;
4 to 20 mA (3-wire) output with 18 to 30V input,
60 mA max 75°C (167°F max)
Measuring Range: 25 to 450 mm (1 to 18") full scale
Linearity Error: ±0.15% of Full Scale Output (FSO) typical,
±0.25% max
Resolution: 0.025% of FS
Update Rate: 300 Hz nominal
Operating Temperature: -20 to 85°C (-4 to 185°F)
Temperature Coefficient: 0.015% of FS/degree°C
Vibration: 5 to 20 Hz, 0.5" p-p; 20 to 2000 Hz, 4.2 g p-p
Shock: 1000 g, 11 ms
Terminations: IEC IP67
Humidity: 95% RH, non-condensing
Housing Material: Aluminum
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CABLE 1 m (3.3') LONG
WITH STRAIN RELIEF
2 x ø8 (0.31)
LDI-127 and LDI-128
ø27 (1.05)
14 (0.56)
ø24 (0.94)
FIELD ADJUSTABLE
FOR CABLE
ORIENTATION
Wiring Table
Function Cable Code
+ Power Input Red
Ground Black
Analog Output Green
Field Programmability White
22 (0.88)
SEE TABLE FOR LENGTH 'A'
22 (0.88) RETRACTED
Unit Length Table, Dimensions: mm (in)
Linear Range Length “A”
25 (1) 114.3 (4.5)
50 (2) 139.7 (5.5)
100 (4) 190.5 (7.5)
150 (6) 241.3 (9.5)
200 (8) 292.1 (11.5)
9 (0.35)
13 (0.50)
Dimensions: mm (in)
ø = diameter
250 (10) 342.9 (13.5)
300 (12) 393.7 (15.5)
350 (14) 444.5 (17.5)
The LDI models come with radial exiting cable
and two swivel rod eye ends for easy installation.
400 (16) 495.3 (19.5)
450 (18) 546.1 (21.5)
To Order
Model No. Description
LDI-127-025-A010A
LDI-127-050-A010A
LDI-127-100-A010A
LDI-127-150-A010A
LDI-127-200-A010A
LDI-128-250-A010A
LDI-128-300-A010A
LDI-128-350-A010A
LDI-128-400-A010A
LDI-128-450-A010A
LDI-127-025-A020A
LDI-127-050-A020A
LDI-127-100-A020A
LDI-127-150-A020A
LDI-127-200-A020A
LDI-128-250-A020A
LDI-128-300-A020A
LDI-128-350-A020A
LDI-128-400-A020A
LDI-128-450-A020A
Comes complete with radial exiting cable and two swivel rod eye ends.
Ordering Example: LDI-127-100-A010A, 100 mm range, 27 mm housing, radial cable, rodeye ends, 0 to 10 Vdc output, aluminum housing.
Linear Sensor, 25 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 50 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 100 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 150 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 200 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 250 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 300 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 350 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 400 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 450 mm range, 27 mm housing, 0 to 10 Vdc output
Linear Sensor, 25 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 50 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 100 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 150 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 200 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 250 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 300 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 350 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 400 mm range, 27 mm housing, 4 to 20 mA output
Linear Sensor, 450 mm range, 27 mm housing, 4 to 20 mA output
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