Radar level sensor technology transmits a high frequency radio wave (microwaves), and receives the wave reflected off the measured medium surface. The time between emission and reception is proportional to the distance to the medium surface – The longer the time of flight, the greater the distance.
Non-contacting design is ideal for measuring corrosive chemicals, bulk solids, slurries, emulsions etc., for various industries such as food and beverages, chemical production, pharmaceutical, etc. Radar level sensors are used for continuous level measurement of liquids that have severe operating conditions like foaming surfaces, vapors, dusty, or vacuum conditions.
Advantages
- Non-contact, flexibility for use on corrosive chemicals, bulk solids, slurries, emulsions, wastewater, etc.
- High accuracy due to high frequency pulse wave and precise transit time measurement
- Sealed pressurised vessel will not affect performance
- Longer range than ultrasonics
- Not affected by turbulence, density, viscosity and corrosiveness
Disadvantages
- High cost compared to other technologies
- Top mounting only
- Blocking distance (Blocking distance is when the level gets too close to the radar device; the reflections cannot be received while the radar is emitting microwave)
- Minimum dielectric constant (The essential condition to operate a radar level measurement is the relative dielectric constant (εr) of the measured medium)
- Mounting of the radar sensor on round vessel tops: When mounting the radar level sensor, keep a distance of at least 200 mm from the vessel/tank wall.
- If the radar level sensor is installed in the center of round vessel tops, multiple echoes can arise.
- In vessels with conical bottom it can be advantageous to mount the radar level sensor in the centre of the vessel, as measurement is then possible down to the bottom.
- Do not mount the radar level sensor above the filling stream. Any fixtures, equipment or obstructions such as ladder, limit switch, etc. can cause false echo and impair the useful echo.
- The socket piece should be designed in a way that the horn antenna end protrudes slightly out of the socket.
BAMO’s Pilotrek Radar Level Transmitter and Pilotrek IP68 Radar Level Transmitter are radar level transmitters without contact with the liquid, with a protected electronic module integrated in the housing. They are an accurate level transmitter of liquids, slurries, emulsions and other chemicals in many fields of application such as: food, energy, pharmaceutical, chemical industries and even in shipbuilding.
PILOTREK RADAR LEVEL TRANSMITTER
- Protection: IP 67
- Measurement: Level, Distance; Volume
- Signal frequency: About 25 GHz (K-band)
- Measuring range: From 0.2 m to 23 m according antenna type (Refer to datasheet)
- Linearity error: < 0.5 m: ±25 mm / 1m to 1.5 m: ±10 mm / 0.5 to 1 m: ±15 mm / 1.5 to 8 m: ±3 mm / > 8 m: ± 0.04 % of measured distance
- Measuring angle: Maximum 19° (Antenna DN 40)
- εr minimum of liquid: 1.9
- Resolution: 1 mm
- Temperature incidence: 0.05 % F.S. / 10 °C
- Power supply: 20 V to 36 V DC
- Output signal: 4-20 mA + HART
PILOTREK IP68 RADAR LEVEL TRANSMITTER
- Protection: IP 68
- Measurement: Level, Distance; Volume
- Signal frequency: About 25 GHz (K-band)
- Measuring range: From 0.2 m to 23 m according antenna type (Refer to datasheet)
- Linearity error: < 0.5 m: ±25 mm / 0.5 to 1 m: ±15 mm / 1 to 1.5 m: ±10 mm / 1.5 to 8 m: ±3 mm / > 8 m: ±0.04% of measured distance
- Measuring angle: Maximum 19° (Antenna DN 40)
- εr minimum of liquid: 1.9
- Resolution: 1 mm
- Temperature incidence: 0.05 % F.S. / 10 °C
- Power supply: 20 V to 36 V DC
- Output signal: 4-20 mA + HART
