LVDT Signal Conditioner operates from 12 or 24 Vdc.

Press Release Summary:

Designed for use in PLCs and vehicular testing systems, single channel Model LVC-2500 DC-LVDT Signal Conditioner offers bipolar 0 to ±10 Vdc, unipolar 24 Vdc, or 4-20 mA (sourcing) analog outputs in 3-wire common ground system. Nominal excitation frequencies of 3, 5, or 10 kHz are available at 3 Vrms for operating LVDTs with primary impedance. Front panel span and zero controls permit output offset adjustment from -100 to +100% of full-scale output.

Original Press Release:

New Low Voltage LVDT Signal Conditioner Designed for Use in PLCs and Vehicular Testing Systems

Pennsauken, NJ, September 13, 2006... Macro Sensors (, a sensor company specializing in the manufacture of LVDT-based linear position sensors and gaging probes, introduces a new single channel, low voltage signal conditioner that supports any standard LVDT, RVDT and VRT half-bridge sensor. Operating from 12V or 24V DC power, the Model LVC-2500 DC-LVDT Signal Conditioner is designed specifically for use in 24V systems with PLCs and mini-PLCs or in 12V mobile and vehicular testing systems.

Units offer three analog outputs: bipolar 0 to ±10 V DC, unipolar 24 V DC, or 4 to 20 mA (sourcing) in a 3-wire common ground system in which the power ground is connected to the output signal's ground. By shifting a movable internal jumper in the LVC-2500 Signal Conditioner, users can choose between 3, 5, or 10 kHz nominal excitation frequencies at a level of 3V rms for operating LVDTs with primary impedance. For multiple channel applications, several LVC-2500 modules can be connected together in a master/slave mode to synchronize their excitation oscillator frequency. This eliminates the effects of spurious beat frequency signals, cross talk, and intermodulation effects.

Internal circuitry produces a low distortion sine wave to excite the LVDT and a synchronous demodulator to convert the LVDT's AC output to a more useful DC voltage proportional to core position. Additional circuitry regulates DC operating power and provides span and zero adjustability, a two-pole low pass output filter, and the voltage-to-current conversion that drives the current loop output.

Packaged in a DIN-rail mounting thermoplastic case, the LVC-2500 withstands the abuse of different factory environments. Front-panel, externally accessible span and zero controls permit output offset adjustment from -100% to +100% of full-scale output. Units incorporate movable coarse gain jumpers, which allow it to operate over an LVDT full-scale output signal range of greater than 100 to 1. As the LVC-2500 does not require phase adjustment control, it works with reasonably long cables between it and the LVDT.

The LVC-2500 Signal Conditioner also offers several popular math functions that can be used between two modules. These include A+B, A-B,(A+B)/2, and (A-B)/2. Therefore, two LVC-2500 modules can be connected together, along with a pair of LVDT gaging probes, to measure differential dimensions, thicknesses, and average height of products in SPC and other quality control applications.

For general specifications and other information on the Model LVC-2500 DC-operated LVDT Signal Conditioner, visit the Macro Sensor web site at or contact Eileen Otto at

About Macro Sensors

Macro Sensors' extensive line of LVDT-based linear and rotary sensors are used for linear position measurement and feedback in a variety of industrial applications including factory automation, motion control systems, metal fabricating, automotive assembly as well as power plants, gas/steam turbines. Incorporated in 1994, the Company offers more than 200 years of cumulative design and manufacturing experience by its key staff in serving its OEM and end-user international customer base. On June 1, 2005, Macro Sensors was acquired by AST, manufacturer of state-of-the-art Micro-Electro- Mechanical- Structures (MEMS) based pressure sensors, transducers, and transmitters. Common applications of AST sensor products are in industrial OEM, hydraulic systems, fuel cells, medical gases, HVAC/R, refrigeration, oil & gas exploration/production, and off-road vehicles. For more information on AST products and technology, visit the AST website at

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