The Rosemount™ 5408 and 5408:SIS are two-wire transmitters for continuous level measurements over a broad range of liquids, slurries, and solids. The measurement principle is fast-sweep Frequency Modulated Continuous Wave (FMCW). Radar signals are continuously transmitted towards the product surface with a microwave frequency modulated over a span. The level is proportional to the frequency difference between currently received and transmitted signal.
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| Accuracy | ±0.08 in. (2 mm) |
| Repeatability | ±0.04 in. (±1 mm) |
| Conformance to specification (±3σ [Sigma]) | Technology leadership, advanced manufacturing techniques, and statistical process control ensure specification conformance to at least ±3σ. |
| Sensor update rate | Minimum 1 update per second |
| Maximum level rate | 40 mm/s as default, adjustable up to 200 mm/s |
| Maximum measuring range | |
| Rosemount 5408: | 130 ft. (40 m) |
| Rosemount 5408:SIS: | 130 ft. (40 m) in Control/Monitoring mode 82 ft. (25 m) in Safety (SIS) mode |
| Antenna | 2-in. (DN50) cone/process seal |
| 3-in. (DN80) cone/process seal | |
| 4-in. (DN100) process seal | |
| 4-in. (DN100) cone | |
| 8-in. (DN200) parabolic | |
| Measurement principle | Frequency Modulated Continuous Wave (FMCW) |
| Output units | Level and distance: ft., in., m, cm, mm Level rate: ft/s, in./min, in./s, m/h, m/s Volume: ft3 , in.3 , yd3 , US gal, imperial gal, barrel (bbl), m3 , l Temperature: °F, °C Signal strength: mV |
| Output | Two-wire, 4-20 mA. Digital process variable is superimposed on 4-20 mA signal, and available to any host that conforms to the HART protocol. The digital HART signal can be used in multidrop mode. |
| Power supply | Transmitter operates on 12-42.4 Vdc transmitter terminal voltage (12-30 Vdc in Intrinsically Safe installations) |
Rosemount™ 5408 Level Transmitter – Non-Contacting Radar