With CiA® 443 CANopen communication interface for use on subsea trees in offshore oil drilling, SSI Series provides feedback on valves in monitoring and controlling their status as part of subsea control module. Sensors are encased in Inconel 625 to withstand deep sea environments with pressures up to 5,000 psi. Levels of nickel, chromium, and molybdenum promote protection against corrosion and meet service life requirements of at least 20 years even if fully exposed to seawater.