An FMCW 80 GHz radar level transmitter is a non-contact level measurement instrument used to continuously monitor the level of liquids, slurries, or solids inside tanks, silos, and process vessels. Let’s break it down:
1. FMCW (Frequency Modulated Continuous Wave)
- Instead of sending out short pulses like pulsed radar, FMCW radar continuously emits a microwave signal whose frequency is gradually increased (or “chirped”) over time.
- The radar measures the difference in frequency between the transmitted and reflected signals (from the material surface).
- This frequency shift (called the beat frequency) is directly proportional to the distance to the surface, enabling very accurate level measurement.
2. 80 GHz Frequency Band
- The “80 GHz” designation refers to the microwave frequency used (typically in the 76–81 GHz range).
- Compared to older 6 GHz or 26 GHz radars:
- Narrower beam angle (as little as 3–4°), which makes it excellent for tall, narrow, or crowded vessels with internal obstructions.
- Higher resolution and better accuracy (often ±1–2 mm).
- A smaller antenna size for the same performance, allowing for more compact designs.
3. Key Features
- Non-contact measurement: No moving parts, reduces maintenance compared to mechanical or guided wave devices.
- Resistant to harsh conditions: Works in high temperatures, pressures, dust, vapor, foam, and turbulence.
- Long measuring range: Depending on the model, it can measure up to 100 meters (300+ feet).
- Fast response: FMCW enables continuous, high-resolution measurement even with rapidly changing levels.
4. Applications
- Liquids: Water, chemicals, fuels, acids, oils.
- Bulk solids: Cement, grains, powders, plastic pellets.
- Challenging environments include high-dust silos, boiling liquids, condensing vapors, and tanks with agitators and mixers.
In short:
An FMCW 80 GHz radar level transmitter is a state-of-the-art instrument for precise, reliable, and maintenance-free measurement of level in industrial processes, offering superior performance under challenging applications compared to older radar technologies.
Harnessing the full power of FMCW 80 GHz radar technology, the Drexelbrook DR3500 Radar Level Transmitter delivers unmatched precision and reliability for continuous level measurement. Unlike older 6 GHz or 26 GHz radar systems, 80 GHz radar provides an ultra-narrow beam angle, virtually eliminating interference from tank walls, fittings, or agitators. The result is exceptionally accurate, maintenance-free level measurement—even in narrow, tall, or crowded vessels.
The DR3500 takes this performance a step further. Its flush-mounted PEEK lens antenna, CIP/SIP compatibility, and compact hygienic design make it ideal for applications where cleanliness, durability, and accuracy cannot be compromised. Built to operate at temperatures up to 300 °F (150 °C) and pressures to 362 psig (25 barg), it thrives in the most demanding environments while delivering reliable readings of level, distance, and volume.
Ease of use is central to the DR3500’s design. A touchscreen interface with intuitive navigation simplifies setup and calibration, while advanced signal processing ensures stable measurement—even with turbulence, foam, or vapor present. With the precision of 80 GHz FMCW radar and the robust engineering Drexelbrook is known for, the DR3500 stands out as the go-to solution for demanding industrial and sanitary level measurement applications.
For customers in New England, Drexelbrook is supported locally by Piping Specialties/PSI Controls. As the authorized Drexelbrook representative in the region, PSI provides expert application assistance, product selection guidance, and responsive sales support—ensuring you get the right solution tailored to your process needs.
