HNL110-A 80 GHz Radar Liquid Level Gauge for Solids & Liquids

The HNL110-A radar level gauge antenna emits extremely narrow microwave pulses that travel at the speed of light in air. When they meet the medium surface, part of the energy is reflected back and received by the same antenna. The time between transmit and receive pulses is proportional to the antenna-to-surface distance; a special correlation demodulation technique identifies this nanosecond-scale interval and calculates the distance to the medium surface.

INQUIRY

Non-Contact Radar for Liquids, Solids and Slurries

Suited to petroleum and chemical storage tanks, metallurgical and mining process vessels, food industry tanks and silos, cement silos and clinker storage, coal and bunker level, solid particle and powder level, slurry and thickener tanks, foam, steam and heavy dust environments, small tank measurement, water and oil media, and non-contact level measurement in hazardous areas with metal or non-metal containers.

Good fit: petroleum/chemical tanks, metallurgy and mining vessels, food tanks and silos, cement silos and clinker, coal bunkers, solid particles and powders, slurry and thickener tanks, foam/steam/heavy dust, small tanks, water and oil, hazardous-area non-contact measurement.

Is HNL110-A Suitable for Your Application?

Choose HNL110-A when:

• You need non-contact level measurement on solid particles, slurries, water or oil, unaffected by medium characteristics such as density, viscosity or vapor.

• The range is within 0–70 m standard, with special ranges up to 100 m on request.

• You require 4–20 mA or 4–20 mA with HART output, flange or thread connection, and optional explosion-proof version.

Confirm with us first when: the pressure exceeds the selected bar rating, the process temperature is outside the selected version, the tank has extensive internal obstructions, or the antenna nozzle must handle heavy buildup.

Design and Advantages

Narrow beam, concentrated energy

Small beam angle with concentrated energy gives strong anti-interference and improved accuracy and reliability. The higher frequency (up to 80 GHz) reaches a maximum 70 m measurement distance; the short wavelength suits small-particle materials and works in foam, steam and heavy dust.

Small blind spot, wide vessel range

Measurement is unaffected by the characteristics of the measured medium, with small blind spots, so it also performs well in small tanks. Low transmission power in pulse mode, low energy consumption and no harm to people, allowing installation in various metal and non-metal containers.

Antenna selection

Standard horn antenna, standard swept horn antenna and other antennas, plus parabolic and high-temperature parabolic antennas. Horn diameters and launch angles: Ø48 18°, Ø78 12°, Ø98 8°, Ø123 6°, Ø198 5°, Ø246 4°.

Technical Specifications

Electrical Connection and Setup

The reference surface for measurement is the sealing surface of the thread or flange. Menu setup covers blind spot range, range setting, high level adjustment and low level adjustment. Two-wire 4–20 mA (or HART) connects to the 24 VDC supply and loop load; configure the upper and lower limits for pump or interlock control.

Selection Code

Mechanical Dimensions

Housing with flip-open display lid, side cable gland and horn or parabolic antenna on thread or flange connection. Horn diameter and launch angle follow the antenna selection above; overall length varies with antenna and flange version.

Installation Notes

Mount the antenna nozzle over a clear path to the surface, away from inlet flow, agitator, support beams and vessel walls that cause internal reflections. In narrow tanks or silos, the narrower 80 GHz beam reduces sidewall echoes. Keep the antenna clear of buildup and choose a dust cover where dust or sticking occurs; verify the strongest echo corresponds to the surface during commissioning.

Typical Applications

• Oil & gas, chemicals: storage tanks, process vessels, water and oil media.

• Metallurgy & mining: slurry and thickener tanks, bunker level.

• Food, cement, coal: food tanks and silos, cement silos and clinker, coal and powder storage.

• Difficult surfaces: foam, steam and heavy dust, small-particle solids, small tanks.

What to Send Us for Selection

Send: medium (liquid, solid, slurry), surface condition, required range, tank or silo geometry and nozzle size, pressure and temperature, frequency preference (26/80 GHz), output (4–20 mA / HART), connection, dust cover and hazardous-area classification. We will confirm the antenna and selection code before quoting.

Frequently Asked Questions

Can radar measure through heavy foam?

Thick foam can partly scatter the microwave, but the short 80 GHz wavelength and narrow beam still perform in many foam, steam and dust duties. Describe the foam type and thickness; we will match the antenna and frequency.

How does an 80 GHz beam improve measurement in narrow tanks?

The narrow beam angle concentrates energy away from sidewalls, supports smaller nozzles and reduces echoes from internal obstructions, which is especially useful in narrow tanks, tall silos and small-particle solids.

Will steam or dense dust reduce radar echo reliability?

Radar is less affected by vapor and dust than ultrasonic measurement, but heavy buildup on the antenna can weaken the echo. Use a suitable horn or parabolic antenna and dust cover, and keep the face clean.

Can 4–20 mA HART output control pump protection interlocks?

Yes. The 4–20 mA loop feeds the PLC or control system; HART carries diagnostics and parameter adjustment. High/low limits are configured in the menu for pump protection or overflow interlock.

What nozzle position minimizes blind zones and internal reflections?

Place the nozzle on a clear centerline, off-center from inlet jets and agitator, and away from walls and supports. Set the blind spot and range in the menu so the nearest valid surface is measured without false echoes.

Datasheet Download

HNL110-A Radar Level Gauge Datasheet (PDF) — view all product manuals on our Download page »

Need a Radar Level Gauge for Solids or Liquids?

Send us the medium, range, pressure and temperature. We will confirm the antenna, frequency and selection code before we quote.

Send us your application details »