What is a radar level transmitter?

The working conditions in the chemical and pharmaceutical industry are typically characterized by strong corrosivity, flammable and explosive hazards, high tendency of crystallization, drastic pressure fluctuations, and extremely stringent hygiene requirements. Boasting non-contact measurement and powerful signal penetration, 80 GHz radar level transmitters stand as the top choice for such harsh complex environments.
 

What are the key applicable working scenarios of radar level transmitters in chemical and pharmaceutical production?

1. Reactors

This is the core and most complicated working condition in pharmaceutical processes.

Challenges

Reactors are internally equipped with agitators and heating coils, and liquid surfaces often generate foam, boiling turbulence or violent fluctuations.

Advantages of Radar Instruments

80 GHz radar features an extremely narrow beam angle (typically 3° to 8°), which can accurately bypass agitator blades and tank wall obstructions. Meanwhile, high-frequency signals can effectively penetrate thin foam layers.

2. Storage Tanks for Strongly Corrosive Media

Pharmaceutical production frequently involves strong acids (hydrochloric acid, sulfuric acid), strong alkalis and potent solvents.

Challenges

These media corrode metal sensors and drastically shorten equipment service life.

Advantages of Radar Instruments

Antennas are fully encapsulated with chemically inert PTFE (Polytetrafluoroethylene) or PEEK materials. Combined with genuine non-contact measurement, corrosion risks are completely eliminated.

3. High-Cleanliness & Aseptic Environments

Finished pharmaceutical products and intermediates require rigorous hygiene standards compliant with GMP regulations.

Challenges

Sensors must avoid dead spaces for liquid accumulation and support CIP (Clean-in-Place) and SIP (Sterilize-in-Place) processes.

Advantages of Radar Instruments

Flush-mount antenna design eliminates liquid retention dead zones, and the hardware withstands high-temperature steam sterilization, fully meeting aseptic production standards.

4. Tanks for Volatile & Toxic Solvents

Typical media include ethanol, etc.

Challenges

Volatile vapors raise internal tank pressure, and these substances are flammable and explosive.

Advantages of Radar Instruments

• Strong penetration: Radar signals remain unaffected by vacuum, high pressure or vapor clouds.
• Explosion-proof safety: Intrinsically safe or flameproof certified designs work with tank-side alarm units to prevent tank overflow hazards in real time and protect on-site personnel.

5. Viscous or Crystallization-Prone Media

Challenges

Thick media easily adhere to sensor surfaces.

Advantages of Radar Instruments

80 GHz radar delivers concentrated signal energy with built-in material adhesion compensation. Even with slight condensation or residue attached to the antenna, the powerful signal can penetrate obstructions to capture accurate liquid level reflection data.

Summary of Working Conditions

Nuoying Recommendation: For chemical and pharmaceutical working conditions, install transmitters away from feed inlets to prevent direct liquid spray onto antennas and agitator shafts.

The combination of an 80 GHz radar transmitter and tank-side alarm unit is ideal for high-high (HH) liquid level safety interlock. It provides a secondary safety backup independent of the DCS control system.

For more industrial measuring instruments, please contact us for professional process control and safety monitoring solutions:

Nuoying Automation

Glossary Notes

1. 80G radar level transmitter: 80 GHz radar level transmitter (industry standard term)
2. Tank-side alarm unit: Tank-side alarm instrument / tank overflow alarm
3. GMP: Good Manufacturing Practice
4. CIP: Clean-in-Place
5. SIP: Sterilize-in-Place
6. PTFE: Polytetrafluoroethylene (Teflon)
7. PEEK: Polyetheretherketone
8. DCS: Distributed Control System
9. HH alarm: High-high level alarm (critical overflow interlock)
10. Intrinsically safe / flameproof: Two mainstream explosion-proof grades for industrial instrumentation