The 4-20 mA loop-powered LVDTs are ideal for use in liquid level gaging, robotic automation and industrial automation controls. The 4-20mA output signal provided by the sensors integrates with a variety of PLCs, digital indicators, computer-based data processors, and QC data collection systems. It also allows for long transmissions and greater noise immunity, ideal for subsea applications requiring long cable runs.
NewTek offers hermetically-sealed versions of its 4-20 mA free-core and spring-loaded LVDTs capable of withstanding dirt, water, steam, and other harsh elements. Constructed of TIG welded stainless steel, these DC-operated linear position sensors operate in hostile environments while the loop wiring connects to instrumentation remotely positioned in benign locations.
Offering the frictionless operation and high resolution associated with LVDT technology, the 4-20 mA sensors offer high resolutions with a standard 0.25% and optional 0.1% maximum non-linearity. Operating from 11 –28 VDC, the DC-operated linear position sensors are available in full ranges from 0.10” (2.5 mm) to 20” (500 mm). NewTek offers its 4-20mA output sensors with built-in surge and polarity protection to guard against voltage spikes and hookup errors.