Radar Level Transmitter Complies with API 18.2 Custody Transfer Standard

March 20, 2019
Emerson’s Rosemount3308 Guided Wave Radar (GWR) wireless level transmitter delivers enhanced accuracy that can be verified without opening the thief hatch, thereby increasing safety.

An upgraded microwave module makes the unit more tolerant of difficult process conditions and able to deliver a more sensitive and repeatable measurement and higher accuracy. When set up in high-performance mode the transmitter provides 1/8 inch (3 mm) resolution and 3/16 inch (4.7 mm) measurement accuracy, which enables it to achieve the installed accuracy of 1/4 inch (6.3 mm) required to comply with API 18.2. In standard mode, the accuracy has been improved to 1/5 inch (5mm). Accuracy can be easily verified in just a few minutes using the Rosemount VeriCase mobile verification tool, which does not require a tank’s thief hatch to be opened or any product to be transferred (opening the thief hatch can release high concentrations of VOCs). The unit also delivers reliability in continuous level and interface monitoring applications in refineries, oil fields, offshore platforms and chemical plants. It is virtually unaffected by changing process conditions such as density, conductivity, temperature and pressure, and because it does not have moving parts, no calibration is required and maintenance is minimized. A wide range of process connections, probe styles and accessories ensure application flexibility.

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Emerson Automation Solutions (Rosemount)