US-based Macro Sensors introduces a line of submersible LVDT Position Sensors for use as part of subsea measurement systems. Macro Sensors say that their LVDTs are proven to offer reliable measurement and feedback for continuous monitoring. The SSIR 937 Series Submersible LVDT Position Sensor is now a standard design available from stock for fast turnaround. Offering extraordinary repeatability in extreme pressure environments, the SSIR 937 Series Submersible LVDT Position Sensors can withstand deep sea environments with external pressures to 5000 psi. Inconel construction enhances the already high reliability of the LVDT assembly, ensuring the submersible transmitters can meet life requirements of at least 20 years, even if the device is fully exposed to seawater at depths greater than 10,000 feet. Designed for use in either pressure-balanced, oil-filled containers or directly in seawater, these rugged, 0.94 inch (24 mm) diameter LVDT Position Sensors are available in standard ranges of 2.00 inches (50 mm), 3.00 inches (75 mm) or 4.00 inches (100 mm). Other ranges available upon special request. SSIR 937 Series Submersible LVDT Position Sensors also resolve the problem of getting a signal back to the surface, even at great water depths. To minimize the number of pressure-sealed connections and I/Os, a 4-20mA two-wire, loop-powered I/O is utilized. A 4-20mA I/O also minimizes noise over long transmission lines
Calibration is necessary before the installation of an AC- operated linear position sensor to ensure accuracy. Calibration corrects any slight variances between sensors, helping to improve repeatability. Because of the linearity of LVDT Sensor output, a simple two-point calibration is simple. Two points should be as far apart as possible, but within the linear range of the LVDT Linear Position Sensor and preferable within the measurement range in which it will be used.
LVDT Linear Position Sensors Available in Different Housings to Perform in Hostile Chemical, Radiation and Seawater Environments. Macro Sensors (www.macrosensors.com) offers its AC-operated LVDTs in different material housings to perform in varying operating environments including those with high and low temperature extremes, radiation exposure, seawater and vacuum pressure conditions. Standard configurations of Macro Sensors’ AC-operated linear position sensors are