Theory of operation
The Rosemount™ 3308 Series is the first true wireless level transmitter that is based on the Time Domain Reflectometry (TDR) principle. Low power nano-second-pulses are guided along a probe submerged in the process media. When a pulse reaches the surface of the material it is measuring, part of the energy is reflected back to the transmitter, and the time difference between the generated and reflected pulse is converted into a distance from which the total level or interface level is calculated.
The reflectivity of the product is a key parameter for measurement performance. A high dielectric constant of the media gives better reflection and a longer measuring range. With innovative technologies inherited from other market leading Rosemount guided wave radars, Rosemount 3308 Series delivers reliable measurements without compromising a long battery life.
Emerson Wireless
Emerson Wireless is a self-organizing network solution. Wireless field instruments send data to a Gateway, directly or routed through any of the wireless devices in the network, as illustrated in Multiple communication paths are managed and analyzed in parallel to assure optimal communication and sustained network reliability even if obstructions are introduced
Accuracy
± 0.12 in. (3 mm)
Repeatability
± 0.08 in. (2 mm)
Measurement Range
Up to 56 ft (17 m)
Operating Pressure
Full vacuum to 580 psi (Full vacuum to 40 bar)
Operating Temperature
-40 to 302°F (-40 to 150°C)
Communication Protocol
WirelessHART®
Battery Life
9 years @ 1 min update rate
Diagnostics
Enhanced diagnostics which enables proactive maintenance
Probe Types
Rigid single lead, Segmented single lead, Flexible single lead, Coaxial, PTFE coated probes
Features
- Direct Switch Technology gives increased sensitivity, high reliability, and long battery life
- Signal Quality Metrics offers you the ability to work proactively with your level instrumentation
- Native wireless can give you a better overview of your plant by automating applications that you have not been able to automate before
