The Rosemount 3308 guided wave radar (GWR) wireless level transmitter complies with the API 18.2 standard. An upgraded microwave module has made it more tolerant to difficult process conditions and therefore able to deliver a more sensitive and repeatable measurement and higher accuracy. API 18.2 requires level transmitters to operate with 1/8 in (3 mm) resolution and 3/16 in (4.7 mm) measurement accuracy, which the transmitter achieves when set up in high-performance mode. The top-mounted device is almost unaffected by changing process conditions such as density, conductivity, temperature and pressure. Because it does not have moving parts, no calibration is required.
