Transmitter overview
Measurement principle
Low power, nano-second microwave pulses are guided down a probe submerged in theprocess media. When a microwave pulse reaches a medium with a different dielectric constant, part of the energy is reflected back to the transmitter.
The transmitter uses the residual wave of the first reflection for measuring the interface level. Part of the wave, which was not reflected at the upper product surface, continues until it is reflected at the lower product surface. The speed of this wave depends fully on the dielectric constant of the upper product.
The time difference between the transmitted and the reflected pulse is converted into a distance, and the total level or interface level is then calculated. The reflection intensity depends on the dielectric constant of the product: the higher dielectric constant value, the stronger reflection.
Accuracy
± 0.12 in. (3 mm)
Repeatability
± 0.04 in. (1 mm)
Measurement Range
Up to 164 ft (50 m)
Operating Pressure
Full vacuum to 5000 psi (Full vacuum to 345 bar)
Operating Temperature
-320 to 752 °F (-196 to 400 °C)
Communication Protocol
4-20 mA/HART™, Foundation™ Fieldbus, Modbus™
Safety
SIL 2 IEC 61508 certification
TÜV tested and WHG approved for overfill prevention
Remote proof-test capabilities through verification reflector
Diagnostics
Enhanced diagnostics enabling proactive maintenance
Probe Types
Rigid single lead, Segmented single lead, Flexible single lead, Coaxial and large coaxial, PTFE coated probes, Vapor probe
Warranty
Up to five years
Features
- Direct Switch Technology gives increased sensitivity, high reliability, and long measurement ranges
- Signal Quality Metrics gives you the ability to work proactively with your level instrumentation
- Probe End Projection offers greater level measurement reliability
- Dynamic Vapor Compensation for improved plant heat rate
- Verification reflector for remote proof-testing and unique level transmitter verification
- Ultra-thin layer detection through Peak-in-Peak technology
