The YT-3300 and YT-3400 Smart valve positioners are an excellent choice for many demanding valve and actuator control applications. They provide superior repeatability, accuracy and reliability. Input: 4-20mA, Explosion Protection class: NEMA-4X with CSA, FM, and ATEX available as well as others. Optional 4-20mA or limit switch position feedback confirmation is available as well. Features available are Auto calibration, LCD display and Partial Stroke Test as well as HART, Profibus, Foundation Fieldbus.