AC-LVDT Position Sensor LA-21-A series

For Use In
Stamping Presses
Power Turbine Valves
Injection Molding Machines
Roller Gap in Steel or Aluminum Mills
LA-21-A Series
AC-LVDT Linear Position Sensor
Linear Position Feedback for Typical Industrialized Applications and Environments

The LA-21-A series AC LVDTs offers the robust designs for which Alliance Sensors Group is known in typical industrial packages, with full ranges from 3 inches (75 mm) to 15 inches (375 mm). They are supplied in a zinc-plated steel 0.805 inch (20.5 mm) diameter housing with 4-inch (100 mm) stripped-and-tinned axial leads. Each LVDT’s core is enclosed in a 3/8 inch (9.5 mm) diameter extension rod from which it cannot break loose and has a 5/16-24 UNF or M8 X 1.25 male thread for easy attachment.

LA-21-A AC-LVDTs are ideal for stamping or drawing press die opening, injection molding machine platen position, process valve controls, and roller gap feedback in steel or aluminum mills. Mated with ASG’s SC-200 industrial LVDT DIN-rail-mountable analog output signal conditioner, and LA-21-A LVDT becomes an ideal solution for typical industrial applications requiring rugged, accurate position sensors.

  • - Mildly Radiation Resistant
  • - Stock Ranges from 3 Inches to 15 Inches (75 mm to 375 mm) Full Scale
  • - Core Totally Enclosed in 3/8 Inch (9.5 mm) Diameter Core Extension Rod
  • - Environmentally Sealed to IP-68
Available Full Ranges: 0 to 3, 6, 9, 12, or 15 inches (0 to 75, 150, 225, 300, and 375 mm)
Excitation Frequency: 3 kHz nominal
Excitation Voltage: 3.0 V ACrms (nominal)
Full Scale Output: 0.83 ±10% V ACrms output (nom.) from differentially connected (S1-S2) secondaries (ref: 3 Vrms excitation); sum of secondaries output is constant over range for ratiometric (S1-S2)/(S1+S2) operation
Linearity Error: ≤±0.5% of FSO
Operating Temperature: -40 to 175 C (-40 to 350°F)
Temperature Coefficient: ≤±0.025% FSO/degree K
Humidity: 95% RH non-condensing
Shock: 1000 g, 11 msec.
Vibration: 5-20 Hz 0.5 inch p-p; 20-2000 Hz 4.2 g p-p
Ordering Info Table
Series Range inches Termination
LA-21-A- XX- XX
  03 - 3" 04 - 4" leads
  06 - 6"  
  09 - 9"  
  12 - 12"  
  15 - 15"  



Configuration Table

If you are looking for CAD drawings of our LA-21-A sensor, simply call us at 856-727-0250 or use the online contact us form by clicking here. 


Product Diagram

Product Video

Stocking Distrubutors