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S2A LVDT/RVDT/LVRT signal conditioner

Image S2A

Alliance Sensors Group's model S2A DIN-rail-mounting LVDT signal conditioner is designed specifically for the power generation industry. It offers comprehensive diagnostics for sensor or wiring failure, real time recalibration of the Full Span and Zero outputs, enhanced ground loop noise rejection, and backward compatibility to legacy S1A signal conditioners.

Utilizing front panel push buttons for easy calibration, the S2A is engineered to work with the widest range of LVDT, RVDT, and inductive half-bridge LVRT sensors by providing four excitation frequencies that will operate most AC-LVDTs over a 50 to 5,000 mVrms range of sensor output.

S2A modules offer a choice of 8 analog ouptuts and half-duplex RS-485 digital communications to facilitate remote setup and for saving a module's setup parameters to hot swap them with another module.


  • Cybersecurity lock to prevent tampering
  • Smart calibration by front panel push buttons
  • Differential input for superior noise immunity
  • Color-coded screw terminal plugs
  • Auto-mastering
  • Hot swapability
  • Real-time recalibration
  • Diagnostics:
    • Shorted, disconnected, or open primary
    • Shorted, grounded, disconnected, or open secondaries
    • Output voltage shorts or current loop opens
    • Errors during installation and setup


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Demonstration video


S2A vs SC-200