No Probe. No Contact. No Compromise.
A non contact radar level transmitter emits high-frequency microwave pulses towards a liquid or solid surface, measures the time-of-flight of the reflected signal, and calculates the level with high precision; all without any physical contact with the medium. This makes it the preferred choice for corrosive, high-temperature, high-pressure, and hygienic process environments.
The non contact radar level transmitter range covers FMCW and pulse-burst variants operating from 24 GHz to 80 GHz, with outputs including 4-20 mA, HART, PROFIBUS, and Modbus, for liquids, solids, slurries, and interfaces across measuring ranges up to 120 metres.
Dutco Tennant LLC supplies process instrumentation and measurement solutions across the UAE and GCC, connecting projects in oil and gas, water treatment, chemical processing, and power generation with the right level measurement technology.
Reliable Measurement Across the Most Demanding Conditions
- The non contact level transmitter measures through vapour, dust, foam, and condensation without signal loss or drift
- Unaffected by changes in media density, temperature, or process pressure; accuracy remains consistent across varying conditions
- No moving parts and zero contact with the process medium means minimal maintenance over the instrument's service life
- Measuring ranges up to 120 metres with accuracy down to ± 2 mm make these units suitable for both small reactors and large storage tanks
- ATEX and IECEx certified variants allow safe installation in explosive and hazardous area classifications
Intelligent Onboard Capabilities
- FMCW Technology: The non contacting radar level transmitter uses continuously swept frequency signals for high-resolution distance calculation, unaffected by pressure or temperature fluctuations
- False Echo Suppression: Built-in software algorithms map and mask internal tank obstructions such as agitators, heating coils, and standpipes to eliminate spurious readings
- Square Root & Linearisation Functions: Onboard volume calculation and tank linearisation convert raw level readings to flow rate or volume without external computation
- Multilingual Graphical Display: Engineering units, bargraph, and live mA output shown simultaneously for on-site configuration and readability
- Remote Diagnostics: HART 7.0 and Bluetooth commissioning options allow calibration, fault alerts, and status monitoring without climbing to the transmitter
Types
FMCW Radar Level Transmitters
The non contact radar type level transmitter using FMCW technology transmits a continuously varying frequency sweep, delivering superior accuracy and resolution for critical process control.
- Operating frequency range of 76-81 GHz for high-precision measurement in small and narrow vessels
- Unaffected by vapour, foam, dust, or sudden temperature changes
- Integrates with DCS, PLC, and SCADA systems via HART, PROFIBUS, or Foundation Fieldbus
Pulse Burst Radar Level Transmitters
Pulse models emit short microwave bursts and measure the time-of-flight of the reflected signal, making them reliable across general industrial liquid and solid applications.
- Typical operating frequency of 26 GHz with measurement ranges up to 70 metres
- Suitable for liquids, slurries, powders, granules, and pastes in open or enclosed vessels
- Robust construction handles aggressive wash-down and harsh outdoor installations
Horn Antenna Radar Transmitters
Horn antenna units concentrate the radar beam for strong signal returns in vaulted storage tanks and large process vessels with non-corrosive media.
- Preferred antenna type for open-air and above-ground storage tank applications
- Focused beam minimises interference from internal tank structures
- Easy installation without waveguide tubes
Parabolic Antenna Radar Transmitters
Parabolic antenna models produce an extremely narrow, concentrated beam ideal for long-range measurement and low-dielectric solids such as asphalt, resins, and bulk materials.
- Narrow beam allows installation close to tank walls and on existing manhole covers
- High signal-to-noise ratio maintains accuracy in challenging high-temperature environments
- Suited to floating roof tanks with target plate measurement setups
Planar Antenna Radar Transmitters
Planar array antenna units use multi-source transmission to produce concentrated plane waves, minimising waveguide wall interference in floating roof and high-temperature storage tanks.
- Compact, flat form factor integrates within 80 GHz radar housings
- Excellent performance in narrow tanks and spaces where horn antenna installation is impractical
- Low beam divergence reduces false echoes from internal fittings and baffles
Standout Features & Benefits
Immunity to Process Disturbances
- Microwave signals pass through steam, vapour, and condensation without attenuation affecting the level reading
- Dust, heavy build-up, and agitation do not interrupt measurement continuity
- Process pressure and temperature changes have no bearing on calibration or output accuracy
Wide Media Compatibility
- Measures crude oil, volatile liquids, corrosive chemicals, slurries, powders, and sanitary fluids without media-specific adjustments
- PTFE and PFA wetted antenna encapsulation handles aggressive acids, alkalis, and solvents
- Compatible with liquids having dielectric constants above 1.9, covering the vast majority of industrial media
Flexible Installation Options
- Top-mount flange, threaded, and direct nozzle installation configurations suit varied tank geometries
- Transmitter electronics are removable without process shutdown when installed with full-bore isolation valves
- Stilling wells and sensor cages stabilise measurement on turbulent or agitated surfaces
Safety & Communication Certifications
- ATEX II1G Ex ia IIC T6 Ga and IECEx approvals cover Zone 0 and Zone 1 hazardous area installations
- SIL-rated variants support safety instrumented systems in refineries and chemical plants
- IP66 and IP67 ingress protection ratings ensure reliable operation in outdoor and wash-down environments
Application Areas
Oil, Gas & Petrochemical
- Continuous level monitoring in crude oil storage tanks, separators, and knock-out drums
- Interface level detection between oil and water layers in process vessels
- Flare knockout drum and condensate tank measurement in upstream and midstream operations
Water & Wastewater Treatment
- Level monitoring in open channels, sumps, clarifiers, and settling tanks without contact with sewage or sludge
- Pump station wet well management to optimise duty cycles and prevent overflow
- Reservoir and raw water intake level tracking across remote and solar-powered installations
Chemical & Pharmaceutical Processing
- Level measurement in reactors, blending vessels, and storage tanks containing corrosive acids, alkalis, and solvents
- Hygienic applications in pharmaceutical bioreactors and sanitary storage using PTFE-wetted antenna variants
- Accurate fill level control in batch processing to maintain product consistency
Food, Beverage & Bulk Solids Storage
- Silo and hopper level monitoring for grains, sugar, flour, cement, and other bulk solids using parabolic or planar antenna types
- Storage tank level in breweries, dairies, and edible oil processing with clean-in-place compatible units
- Continuous level data feed to SCADA for automated inventory management across multi-tank facilities
