The 12400 Series is said to be the first level instrument that integrates level transmitter, controller and switch functions in a single device. Designed for use in the petroleum-refining, petrochemicals and energy industries, the 12400 Series incorporates an industry-leading set of features, including smart filtering, HART-communication-protocol compatibility and an optional 4–20-mA analog output signal. The device meets SIL 2 compliance (pending) and is certified in full hazardous areas, including ATEX, IECEx, FM and FMc/CSA. Its frictionless sensor delivers a 0.1% measurement resolution. — Dresser Masoneilan, Houston