ProSense 80 GHz FMCW Radar Level Transmitter Features Applications and Benefits

Level measurement looks simple until the vessel foams, vapour builds up, dust fills the headspace, or a mixer blade passes under the sensor. In those conditions, older technologies often need careful setup, maintenance, or process compromises. An 80 GHz FMCW radar level transmitter is built for these tougher jobs because it measures from above the product, without contact, and with a very narrow radar beam.

The ProSense 80 GHz FMCW Radar Level Transmitter fits this class of instrument. It is designed for continuous level measurement in tanks, silos, sumps, process vessels, and storage containers where accuracy, reliability, and low maintenance matter.

This guide explains how the technology works, what specifications to look at, where it performs well, and how it compares with other level measurement methods.

Non-contact radar is often installed above the process, away from product build-up and moving parts.

What the ProSense 80 GHz FMCW radar level transmitter does

The ProSense 80 GHz FMCW radar level transmitter measures the distance from the sensor to the surface of a liquid or bulk solid. The control system then converts that distance into a level reading, volume estimate, or percentage of tank fill.

Because it is non-contact, the transmitter does not need to touch the material. That makes it useful where the product is:

• Corrosive

• Sticky

• Hot

• Abrasive

• Hygienic or contamination-sensitive

• Agitated or moving

• Difficult to access for maintenance

  
  

The “80 GHz” part refers to the radar frequency band. Compared with lower-frequency radar, 80 GHz instruments can use a smaller antenna and produce a much narrower beam. That matters in real tanks because internal structures, ladders, nozzles, agitators, and wall reflections can interfere with measurement.

A narrow beam helps the instrument focus on the product surface rather than everything else inside the vessel.

How FMCW radar level measurement works

FMCW stands for frequency modulated continuous wave. The transmitter sends a continuous radar signal toward the product surface. The frequency of that signal changes in a controlled sweep.

When the signal hits the liquid or solid surface, part of it reflects back to the antenna. The transmitter compares the outgoing signal with the returned signal. The frequency difference between the two reveals how far the surface is from the sensor.

The basic process is:

1. The antenna sends a high-frequency radar signal into the vessel.

2. The signal reflects from the product surface.

3. The antenna receives the echo.

4. Electronics calculate the distance based on the frequency shift.

5. The transmitter outputs a level value to the control system.

   
   

In simple terms, the instrument is measuring distance with radio waves. Since radar is electromagnetic, it does not rely on sound travelling through air. That gives it a major advantage over ultrasonic sensors in vapour, changing air temperature, pressure changes, or noisy environments.

Most industrial radar transmitters are configured using basic tank geometry:

• Empty distance

• Full distance

• Tank height

• Output range

• False echo suppression, where supported

• Damping or response time

• Fail-safe output behaviour

  
  

Once set up, the transmitter continuously reports level through an analogue or digital signal, depending on the model and system design.

FMCW radar calculates level by comparing the transmitted and returned signal.

Key technical specifications to review

Exact values depend on the selected ProSense model, process connection, antenna type, and approval requirements. The following specification areas are the ones that usually matter most when selecting an 80 GHz radar transmitter.

Specification area	What it means	Why it matters
Measuring principle	80 GHz FMCW radar	Provides non-contact continuous level measurement
Measurement type	Distance, level, volume, or percentage output	Allows integration with process control and inventory systems
Measuring range	Model-dependent, commonly suited to small and large tanks	Determines whether the sensor fits the vessel height
Beam angle	Narrow beam, often only a few degrees in this technology class	Helps avoid tank walls, ladders, agitators, and obstructions
Output signal	Commonly 4 to 20 mA, with digital communication available on some models	Connects to PLCs, displays, controllers, and SCADA systems
Accuracy and repeatability	Model and application dependent	Critical for batching, inventory, and process stability
Process connection	Threaded, flange, or adaptor-based options	Must match the vessel nozzle and sealing requirements
Materials of construction	Usually selected to suit the product and environment	Important for corrosion resistance and hygiene
Temperature and pressure rating	Model-specific	Must match the process conditions at the mounting point
Enclosure rating	Industrial ingress protection ratings are common	Protects electronics from dust, washdown, and weather
Configuration method	Local display, pushbuttons, or software options depending on model	Affects commissioning and maintenance time
Power supply	Often loop-powered or low-voltage industrial supply, depending on model	Must suit the site’s instrumentation standard

The most important selection rule is simple: match the sensor to the process, not just the tank height. A tall clean water tank and a dusty cement silo may need different installation details even if their measurement ranges look similar.

Features that make 80 GHz radar useful in the field

The value of the ProSense 80 GHz FMCW Radar Level Transmitter comes from more than its frequency. Its performance depends on how the radar principle, antenna design, signal processing, and mechanical design work together.

A narrow beam helps in crowded vessels

Many tanks are not empty cylinders. They may contain:

• Inlet pipes

• Stilling wells

• Heating coils

• Agitator shafts

• Spray balls

• Bracing

• Access ladders

  
  

A wider beam can pick up echoes from these objects. An 80 GHz radar beam is much more focused, which makes it easier to aim at a clear section of liquid or solids surface.

This can reduce false readings and make installation easier, especially when the transmitter must fit an existing nozzle.

Non-contact measurement reduces wear

With no probe, float, diaphragm, or wetted sensing element extending into the material, radar avoids many common maintenance problems. There is no float to stick, no pressure port to clog, and no probe to coat along its full length.

The antenna or lens can still need cleaning in severe build-up applications, but the contact area is usually far smaller than with many other technologies.

It works across many product types

Radar can measure a wide range of liquids and many bulk solids. It is often used on water, wastewater, chemicals, oils, food ingredients, grains, powders, aggregates, and plastic pellets.

The product’s dielectric properties still matter. Very low dielectric materials can return weaker echoes, and steep angles of repose in solids can affect readings. Even so, modern 80 GHz radar handles many applications that previously required careful tuning or a different sensor type.

It copes well with vapour, dust, and temperature changes

Ultrasonic level measurement depends on the speed of sound through air. That speed changes with temperature and vapour composition. Radar does not have the same weakness.

Dust can still attenuate radar in extreme cases, and heavy condensation on the antenna can cause issues, but 80 GHz FMCW radar is generally a strong choice in harsh headspace conditions.

A focused radar beam is useful when level must be measured through dust and internal obstructions.

Applications across industries

The transmitter’s strengths suit many Australian industrial settings, from water utilities to food production and mining support operations.

Water and wastewater

Common applications include:

• Wet wells

• Pump stations

• Chemical dosing tanks

• Sludge holding tanks

• Clarifiers

• Open or enclosed storage tanks

  
  

Radar is useful where foam, condensation, and changing air temperature can make ultrasonic measurement less stable. Non-contact mounting also reduces exposure to corrosive gases and dirty water.

Food and beverage

Typical uses include ingredient tanks, oil storage, water tanks, syrup vessels, and some dry ingredient silos.

The non-contact design can support hygiene goals because the instrument does not need a long probe inside the product. Material compatibility and cleanability still need to be checked for each installation, especially in washdown or food-contact areas.

Chemical processing

Chemical plants often need level measurement in corrosive, fuming, or hazardous liquids. Radar can reduce maintenance by keeping the sensing element outside the product.

Selection must include process seal material, pressure rating, temperature rating, and site safety requirements. Where hazardous area approvals are required, the exact approved model must match the zone classification.

Bulk solids and powders

Silos and bins can be difficult because the surface is not always flat. Filling creates peaks, emptying creates funnels, and dust can fill the headspace.

The narrow beam of 80 GHz radar helps target a measurement point and avoid wall reflections. It is commonly considered for grains, cement, lime, powders, pellets, sand, and aggregates, provided the model is suitable for the dust and vessel geometry.

Mining, quarrying, and heavy industry

Level measurement in process water tanks, reagent tanks, crusher feed bins, sumps, and storage silos often involves dust, vibration, outdoor exposure, and difficult access.

A non-contact radar instrument can reduce routine inspection, especially when installed on tall tanks or confined vessels where manual checks are costly or unsafe.

How it compares with other level technologies

No level sensor is best for every job. The best choice depends on product, vessel, accuracy needs, budget, approvals, and maintenance access.

Technology	Strengths	Limits compared with 80 GHz FMCW radar
Ultrasonic	Cost-effective, simple, non-contact	Affected by vapour, foam, air temperature, pressure changes, and acoustic noise
Guided wave radar	Strong signal path, good for interfaces and some low dielectric products	Probe contacts the product and can be affected by build-up, bending, or mechanical stress
Hydrostatic pressure	Reliable for many liquid tanks, simple output	Requires product density to be stable and a wetted pressure connection
Capacitance	Useful for point or continuous level in some liquids and solids	Sensitive to coating and dielectric changes
Float switches and displacers	Simple and familiar	Moving parts can stick, wear, or foul
Load cells	Measures mass directly, useful for inventory	Needs structural installation and can be affected by vessel supports, piping, and vibration

For many applications, radar’s biggest advantage is that it measures the surface directly without touching the product. That can mean fewer shutdowns, safer access, and less process disturbance.

Guided wave radar may still be the better choice in small chambers, interface measurement, or applications with heavy foam where a free-space radar echo is weak. Hydrostatic pressure can be the practical choice for simple liquid tanks where cost matters and density is stable. Ultrasonic can work well in clean, open water applications with mild conditions.

The ProSense 80 GHz FMCW radar level transmitter is strongest when the process is variable, access is limited, or the vessel contains obstructions that a narrow radar beam can avoid.

Different level technologies suit different process risks and maintenance needs.

Practical installation points that affect performance

Even strong radar technology needs good installation. Poor mounting can create false echoes, weak signals, or unstable readings.

Key installation practices include:

• Mount the transmitter where the beam has a clear path to the product surface.

• Avoid aiming directly at inlet streams, agitator blades, ladders, and internal pipes.

• Use the correct process connection and gasket for the tank conditions.

• Keep the antenna clear of heavy build-up where possible.

• Confirm the blocking distance near the sensor face.

• Configure empty and full distances carefully.

• Use echo mapping or false echo suppression if the model supports it.

• Check earthing, cable glands, and enclosure sealing for outdoor installations.

  
  

For solids, avoid mounting too close to the wall unless the beam can still target a useful surface. For liquids with agitation, damping may help prevent the control system reacting to every wave or ripple.

Real-world use cases and field-style examples

Specific public case studies for the ProSense model may not always be available, and it is better not to invent them. Still, several common field scenarios show why this class of transmitter is often selected.

Wastewater pump station with condensation

A council pump station needs reliable wet well level control. Ultrasonic sensors have had trouble during cool mornings when condensation forms and the air temperature changes quickly. A top-mounted 80 GHz radar transmitter gives non-contact measurement without relying on sound waves.

The benefit is steadier pump control and less need for sensor cleaning or manual level checks.

Chemical storage tank with corrosive vapour

A plant stores a chemical that gives off vapour near the tank roof. A pressure transmitter risks blocked impulse paths or wetted material issues. A non-contact radar mounted above the liquid reduces contact with the product.

The benefit is lower exposure of the instrument to corrosive liquid and easier maintenance from the tank top.

Grain silo with dust during filling

A grain handling site needs continuous level indication during filling. Dust makes optical and ultrasonic methods less reliable. An 80 GHz radar sensor with a narrow beam can be aimed away from internal braces and towards the main material surface.

The benefit is better inventory visibility during active operation, not only after the dust settles.

Unique selling points to consider

The main selling points of this transmitter type are practical rather than flashy.

High-frequency 80 GHz operation

This supports a compact antenna and narrow beam, which helps in tanks with nozzles, internals, or limited mounting options.

FMCW signal processing

FMCW radar gives continuous distance measurement and strong resolution for many process vessels.

Non-contact installation

The transmitter avoids direct exposure to abrasive, sticky, corrosive, or hygienic products.

Broad application fit

One technology can cover many liquids and solids, reducing the number of sensor types a site must support.

Lower maintenance potential

Fewer moving parts and less product contact can reduce callouts, especially in dirty or hard-to-access vessels.

Easy integration

Industrial output options such as analogue current signals and digital communication, depending on the model, allow use with PLCs, panel meters, and plant control systems.

When to choose it and when to look elsewhere

Choose an 80 GHz FMCW radar transmitter when the application needs accurate, continuous, non-contact level measurement and the process has one or more of these challenges:

• Dust, vapour, or condensation

• Internal tank obstructions

• Agitated liquid surfaces

• Sticky or corrosive products

• Tall tanks or silos

• Limited maintenance access

• Need for reliable inventory or pump control

  
  

Look at other technologies if the application involves heavy stable foam that blocks radar reflection, a very low dielectric product with poor echo return, a tiny vessel with no clear measuring path, or a simple low-cost point level requirement.

The best result comes from reviewing the vessel drawing, product properties, process conditions, and control requirements before choosing the exact model.

Correct selection and installation help radar provide reliable level data in demanding sites.

The takeaway

The ProSense 80 GHz FMCW Radar Level Transmitter is a strong fit for plants that need continuous level measurement without putting a sensor into the product. Its 80 GHz radar beam helps in vessels with obstructions, while FMCW measurement supports stable distance readings across many liquids and bulk solids.

It will not replace every level technology. Ultrasonic, guided wave radar, pressure, capacitance, floats, and load cells all still have good use cases. Yet for many tanks and silos where reliability and low maintenance matter, 80 GHz non-contact radar is often the more capable choice.

The main step is proper selection. Check range, process connection, material compatibility, temperature, pressure, output signal, approvals, and installation position before ordering. A well-matched radar transmitter can give years of dependable level data with minimal process contact and fewer maintenance surprises.