Developed according to SIL (safety integrity level) guidelines, the Sitrans VP300 positioner (photo) is especially suitable for use in the paper, mining and oil-and-gas industries. Sitrans VP300 is said to be the first positioner on the market to feature SIL-certified partial-stroke testing. Air exhausting in the single-acting device is SIL 2 rated. Both the single-acting and double-acting versions of the positioner feature an aluminum housing with high protection (IP66/NEMA 4x), and are especially resistant to vibrations. The device can be used in applications down to –40°C and can even operate in damp air that is contaminated with oil droplets. The positioner has a travel distance of up to 150 mm and can be rotated by up to 120 deg. — Siemens Industry — Industry Automation Div., Nuremberg, Germany