Radar Level Transmitter
Non-contact microwave level measurement for liquids and solids — millimetre-class accuracy, unaffected by temperature, pressure, vapour or dust, from 0.1 to 30 m.
Technical Data
| Measuring principle | Non-contact 26 GHz pulse radar — time-of-flight |
|---|---|
| Operating frequency | 26 GHz series |
| Measuring range | From ~0.1 m up to ~30 m (longer for solids / large tanks, made to order) |
| Accuracy | Typically ±1–2 mm (application dependent) |
| Output signal | 4–20 mA with HART; digital fieldbus versions available |
| Process connection | Threaded (G1½, 1½ NPT) or flanged (EN 1092-1 / ASME B16.5) |
| Wetted materials | 316L stainless, PTFE, PP or PVDF (antenna / seal matched to media) |
| Process temperature | Up to ~150 °C standard; ~200 °C and higher with special versions |
Selection Guide
The all-round frequency for tanks, silos and reactors.
Best forLiquids & solids storageFocused beam threads past agitators, heating coils and nozzle clutter.
Best forCluttered / tall vesselsLonger wavelengths punch through heavy vapour and extreme dust.
Best forHarsh atmospheresDatasheet & Drawings
GA, hook-up and wiring drawings are prepared per order — supplied with your quotation for approval.
EN 10204 3.1 material certificates are supplied with your shipment.
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Frequently Asked Questions
Is a radar level transmitter contact or non-contact?
Non-contact. The antenna radiates microwaves from above the surface and never touches the medium, so there is nothing to abrade, coat or corrode in the process.
Can radar measure both liquids and solids?
Yes. The same time-of-flight principle works for liquids and for powders, granules and aggregates in silos; antenna choice and frequency are matched to the material.
What is the difference between pulse and FMCW radar?
Pulse radar times a microwave burst's round trip, while FMCW radar measures the frequency shift of a continuous swept signal. FMCW generally gives a stronger signal and higher accuracy, especially at 80 GHz.
Does vapour, foam or dust affect the reading?
Radar penetrates vapour and dust and, with the right frequency and antenna, tolerates foam far better than optical or mechanical methods, keeping the measurement stable.
What output does it provide?
A continuous 4–20 mA signal with HART digital data as standard, with digital fieldbus versions available for direct PLC/DCS integration.
Can it be used in hazardous areas?
Yes. TOTFLEX can supply ATEX/IECEx-certified versions with the appropriate protection for explosive gas or dust atmospheres.
Engineered to order. Delivered worldwide.
Send your duty conditions — size, pressure, temperature, medium and connections — and our engineers return a drawing, material selection and lead time.
Request a quote