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LVDT

An LVDT is a linear variable differential transformer and is used to accurately measure linear displacement (position measurement) which is movement in a single direction along an axis. An LVDT is often also referred to as a linear displacement transducer or a linear position transducer. A device similar to this is an RVDT (Rotary Variable Differential Transformer) used to measure rotary displacement.

There are many types of differential transformers sensors. LVDTs have different armatures, temperatures ranges, built-in electronics and stroke lengths. LVDT sensors with a captive guided spring return armature have been designed for measuring multiple targets. These types of armatures are ideal for measuring surface structure changes. A captive guided armature is suited to longer measurements. The armature is attached to both the body and structure it is measuring.

How does an LVDT work?

An LVDT position sensor has a primary coil and two secondary coils. This coil assembly is mounted to a stationary object while a ferromagnetic core is attached to the object whose position is being measured. The core links the electromagnetic field of the primary coil to the secondary coils. The difference from the coil outputs results in proportional voltage relative to the movement of the core versus the coils.

What are the benefits of a linear variable differential transformer?

The LVDT has a long life as there is no contact between the sensing elements
A differential transformer is robust and can operate in harsh conditions
Extremely small movements are measured by an LVDT
An LVDT has excellent repeatability for performing precise applications
Analog input and output
Absolute measurement giving no position loss
A differential transformer can convert the rectilinear motion of an object into an electrical signal
The LVDT can be used in a range of applications within industry or research as it can be easily modified to fulfil different tasks.

An LVDT is an electrical transformer and requires a different type of AC power (around 3 Vrms @ 3 kHz). The support electronics for a differential transformer, such as a signal conditioning unit, supply this sort of excitation power. A signal conditioning unit also converts the low level AC voltage from an LVDT into higher level DC output voltage.
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Detalles Brand Stock Recorrido Rango de Corriente de Entrada Rango de Voltaje de Excitación Rango de Tensión de Salida Sensibilidad Tiempo de respuesta Altura Global Anchura Global Profundidad Global Temperatura Mínima de Funcionamiento Temperatura Máxima de Funcionamiento
Módulo híbrido demodulador LVDT,+/-5Vdc
  • $ 79.789
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Solartron Metrology 108 - 50000 μA ±7,5 → 18 Vdc 5 → 10V dc 2,5 → 3,75 mVrms - 20mm 52 mm 5 0 +70°C
LVDT en miniatura ac SM1,+/-1mm 1-10Vdc
  • $ 115.548
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Solartron Metrology 67 ±1mm 10 → 13 mA 1 → 10 Vrms - 110 mV/V/mm a 2 kHz, 142 mV/V/mm a 5 kHz, 147 mV/V/mm a 10 kHz, 149 mV/V/mm a 20 kHz, 69 mV/V/mm a 1 kHz 1,5 ms - 25 - -40 +85°C
LVDT en miniatura ac SM3,+/-3mm 1-10Vdc
  • $ 145.804
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Solartron Metrology 31 ±3mm - 1 → 10 Vrms - 118 mV/V/mm a 1 kHz, 128 mV/V/mm a 20 kHz, 130 mV/V/mm a 10 kHz, 134 mV/V/mm a 2 kHz, 136 mV/V/mm a 5 kHz 1,5 ms - 42.5mm - -40 +85°C
LVDT sin guiado DFg1,recorrido +/-1mm
  • $ 270.960
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Solartron Metrology 19 ±1mm 10000 μA 10 → 24 Vdc - 750 mV/mm a 10 Vdc 5 ms - - - -20 +80°C
LVDT sin guiado DFg2.5,recor. +/-2.5mm
  • $ 294.354
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Solartron Metrology 12 ±2.5mm 10000 μA 10 → 24 Vdc - 750 mV/mm a 10 Vdc 5 ms - - - -20 +80°C
LVDT, Recorrido de ±15mm, ±10 V, ±5 V, 0 → 5 V
  • $ 480.035
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Solartron Metrology 9 ±15mm - 10 → 30 Vdc ±10 V, ±5 V, 0 → 5 V - - - - - 0 +65°C
LVDT, 0,6 mA, Recorrido de ±50mm
  • $ 310.861
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Solartron Metrology 9 ±50mm 0.6 mA 10 → 30 Vdc - 15 mV/V/mm - - - - -40 +120°C
LVDT, Recorrido de ±25mm, ±5V
  • $ 504.801
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Solartron Metrology 8 ±25mm - 10 → 30 Vdc ±5V - - - - - 0 +65°C
LVDT, 1,5 mA, Recorrido de ±15mm
  • $ 258.583
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Solartron Metrology 6 ±15mm 1500 μA 1 → 5 Vrms - 60 mV/V/mm - - - - -40 +120°C
LVDT, Recorrido de ±2.5 → ±50.8mm
  • $ 107.433
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Analog Devices 5 ±2.5 → ±50.8mm - 3 Vrms - 94,5 mV / V / mm - 44.5mm 19.05 (Dia.)mm - -55 +95°C
LVDT, 1,1 A, 250 mA, ±10V dc
  • $ 406.735
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Solartron Metrology 2 - 1,1 A, 250 mA 90 → 264 Vac ±10V dc 400 → 2.500 mV - - - - 0 +60
LVDT, 6 mA, Recorrido de ±1.5mm, 5V dc
  • $ 174.688
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Solartron Metrology 2 ±1.5mm 6 mA 1 → 10 Vrms 5V 108 mV/V/mm@ 5 kHz - 20.6mm - 9.52 (Dia.)mm -40 +150°C
LVDT, 3,2 mA, Recorrido de ±10mm, 5V dc
  • $ 255.850
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Solartron Metrology 2 ±10mm 3,2 mA 1 → 5 Vrms 5V 85 mV/V/mm@ 20 kHz - 46.5mm - 9.52 (Dia.)mm -40 +150°C
LVDT, Recorrido de ±100mm, ±10 V, ±5 V, 0 → 10 V, 0 → 5 V
  • $ 541.294
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Solartron Metrology 0 ±100mm - 10 → 30 Vdc ±10 V, ±5 V, 0 → 10 V, 0 → 5 V - - - - - 0 +65°C
LVDT, 7 mA, Recorrido de ±12.5mm, 5V dc
  • $ 258.583
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Solartron Metrology 0 ±12.5mm 7 mA 1 → 5 Vrms 5V 69 mV/V/mm@ 5 kHz - 83.5mm - 9.52 (Dia.)mm -40 +150°C
LVDT, 0,5 mA, Recorrido de ±25mm, ±10 V, ±5 V, 0 → 10 V, 0 → 5 V
  • $ 283.349
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Solartron Metrology 0 ±25mm 500 μA 10 → 30 Vdc ±10 V, ±5 V, 0 → 10 V, 0 → 5 V 21,5 mV/V/mm - - - - -40 +120°C
LVDT, Recorrido de ±25mm, 5V dc
  • $ 327.356
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Solartron Metrology 0 ±25mm - 1 → 10 Vrms 5V - - 83.5mm - 9.52 (Dia.)mm -40 +150°C
LVDT, Recorrido de ±50mm, ±10 V, ±5 V, 0 → 10 V, 0 → 5 V
  • $ 529.543
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Solartron Metrology 0 ±50mm - 10 → 30 Vdc ±10 V, ±5 V, 0 → 10 V, 0 → 5 V - - - - - 0 +65°C
LVDT sin guiado DFg5,recorrido +/-5mm
  • $ 302.601
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Solartron Metrology 0 ±5mm 13000 μA 10 → 24 Vdc - 540 mV/mm a 10 Vdc 3 ms - - - -20 +80°C
LVDT, 4,5 mA, Recorrido de ±6mm, 5V dc
  • $ 214.589
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Solartron Metrology 0 ±6mm 4500 μA 1 → 10 Vrms 5V 78 mV/V/mm@ 5 kHz - 46.5mm - 9.52 (Dia.)mm -40 +150°C
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