PENNSAUKEN, New Jersey -- Macro Sensors has unveiled its HP and seawater-resistant LVDT position sensors. The sensors can be used to measure the position of valves on subsea oil well control towers, as well as controlling or measuring position of robotic arms and actuators.
According to Macro, the sensors also resolve the problem of getting a signal back to the surface for monitoring, recording and/or controlling some physical action taking place on the surface or sea water. To minimize the number of pressure-sealed connections and I/Os, a 4-20mA two-wire, loop-powered I/O can be utilized, which is then, converted to a RS485 signal for transmission to the surface, the company says.
Typically, a digital converter is contained in a high-pressure sealed bottle located nearby. A 4-20mA I/O also minimizes any noise over long transmission lines. Offsets can be easily made in the data acquisition system on the platform above.