Submersible Displacement Sensors
LVDT with 4 to 20 mA Output - Discontinued

LD680 Series

Submersible Displacement Sensor LVDT's with 4 to 20 MA Output, LD680 | LD680 Series

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  • 1 Meter Metal Cable with Bulkhead fitting
  • Rugged Construction for Harsh Environments
  • Extra Screening Against Electrical Interference
  • Stainless Steel Body and Core Carrier
  • IP68 Environmental Rating
  • Captive Core Design
  • Ranges from 0-5 mm to 0-50 mm
  • Applications:
     Proprotional Actuators
     Robotic Automation
     Linear Servo Actuator
     Industrial Automation Controls
     Motion Control


The LD680 series has been discontinued. Please see the LD630 series as a possible alternative or contact our Pressure, Strain and Force Engineering department.

The LD680 Series are submersible DC LVDT’s with a 2 wire 4 to 20 mA loop output. They are environmentally sealed up to 100 bar (1500 psi) and come standard with 1 m (3.3') of mineral insulated cable and 3 m (9.8') of polyurethane cable. Other lengths are available on special order.

Linearity: <0.2% FSO
Excitation Voltage: 10 to 30 Vdc
Output: 4 to 20 mA
Output Ripple: 0.02% FSO
Bandwidth: 500 Hz (-3 dB)
Storage Temp: -20 to 85°C (-4 to 185°F)
Operating Temp: 0 to 65°C (-4 to 149°F)
Temperature Coefficient: <0.03% FSO/ °C (0.017%/°F)
Vibration (Sinusoidal):
    10 to 50 Hz: 1 to 10 g rms linear
    50 Hz to 1 kHz: 10 g rms
Shock: Drop test 1 meter onto hard surface
Connection: 1 m (3.3') of mineral insulated cable with 3 m (9.8') of polyurethane cable (standard)
Sealing: Sealed up to 100 bar (1500 psi)
Body Material: 300 series stainless steel
Core Material: Nickel-iron
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