The Pulsar® Model R96 is a loop-powered, 24 VDC, non-contact radar level transmitter. It has a longer measurement range, improved diagnostics and is easier to use than most loop-powered radar transmitters.
Non-Contact Radar level transmitters are offered with various operating frequencies, each having their own advantages.
There are two types of Non-Contact Radar transmitters:
- Frequency Modulated Continuous Wave (FMCW)
- Pulse Burst Radar
FMCW devices transmit a continuous signal with a constantly changing frequency down toward the liquid. The detected difference in frequencies between the transmitted signal and return echo is proportional to the distance.
Pulse Burst Radar transmitters, the older of the two types, emit short bursts of energy to a liquid surface, and incorporate ultra-high-speed timing circuitry to measure the time of the return signal reflected off the liquid surface. Distance is then calculated utilizing the equation:
Distance = C x Transit Time/2, (where C = Speed of Light)
- Performance not process dependent (changing specific gravity and dielectric have no effect)
- 6 GHz operating frequency offers superior performance in the tougher applications of turbulence, foam, and heavy vapors
- Antenna designs to +400 °F (+204 °C)
- Range up to 130 feet (40 meters)
- Quick connect/disconnect probe coupling allows vessel to remain sealed
- SIL 2 capable with Safe Failure Fraction (SFF) = 92.7% (FMEDA available upon request)
- PACTware™ PC software interface with new improved DTM.
Pulse burst radar horn antennas are a robust and electromagnetically efficient design that offers the highest level of performance in typical through-air radar applications. The largest horn antenna should be used to ensure the best possible performance in all operational conditions.
Dielectric rod antennas
For a large number of pulse burst radar installations that require 6 GHz operation where an existing process connection will not accommodate a horn antenna, Magnetrol offers a dielectric rod antenna. Typically constructed of 316SS and TFE or polypropylene, additional materials are also available.
PULSAR transmitter technology is based on pulse-burst radar technology together with equivalent time sampling circuitry. Short bursts of 6 GHz microwave energy are emitted and subsequently reflected from the liquid level surface.