AC-operated LVDTs are designed for a wide range of position measurement applications. These are rugged hermetically sealed sensors, constructed entirely of stainless steel, and intended for general industrial use. AC-operated LVDT signal conditioners receive AC current or AC voltage as input signals. They excite a transducer according to defined parameters for voltage and frequency. A variable gain differential amplifier receives the resulting signal, which is then coupled to a synchronous detector, multi-step filter, analog-to-digital converter, and micro-controller. The AC LVDT requires onboard oscillator, carrier amplifier, and demodulator circuitry for externally. The AC LVDT is able to tolerate extreme variations in operating temperature from -40 to + 120 degree C. The AC LVDT advantages include greater accuracy and a smaller body size.