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INDIANA INSTRUTECH
FIG. 01 / 0476–81 GHz FMCW radar level transmitter — representative photograph of this radar type from a matching manufacturer listing (nameplate removed); not a factory photo of this exact unitProduct photograph
76–81 GHz FMCW radar level transmitter — representative photograph of this radar type from a matching manufacturer listing (nameplate removed); not a factory photo of this exact unit

02 · Level Transmitters76–81 GHz FMCW radar

76–81 GHz FMCW Radar Level Transmitter

Indiana catalogue ID
II-LT-002
Model line
76–81 GHz

Non-contact level to 120 m with an 8 cm blind spot and a 3° beam.

Range
0.1 – 120 m
Accuracy
±1 mm
Beam angle
3° or 8°
Request a Quote Specifications Technical sheet (PDF)

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A

Overview

A frequency-modulated continuous-wave radar level meter supporting four-wire and two-wire applications. The higher operating frequency and shorter wavelength make it particularly suitable for solids. Transmitting and receiving through a lens gives it an advantage in high dust and harsh temperature environments.

Operating principle

  1. 01Built on self-developed CMOS millimetre-wave RF chips, giving a compact RF architecture, higher signal-to-noise ratio and smaller blind spots.
  2. 02The 5 GHz working bandwidth gives higher measurement resolution and accuracy.
  3. 03The narrowest 3° antenna beam angle minimises the effect of interference in the installation environment, which makes installation more convenient.
  4. 04The shorter wavelength reflects better off solid surfaces, so no universal flange is needed for aiming.

In context

Specified forreal process duty.

  • 01Solid level in silos and hoppers, including high dust environments
  • 02Liquid level in storage tanks
  • 03High-temperature process vessels up to +200 °C at the antenna

B

Technical specifications

Transcribed from the product documentation. A value that is not shown is not stated in the source, and is confirmed with the quotation.

Measurement

Measurement
Transmission frequency76 GHz – 81 GHz, FM scanning frequency width 5 GHz
Measuring range0.1 – 120 m
Measurement accuracy±1 mm
Beam angle3° or 8°
Dielectric constant≥2

Electrical

Electrical
Power supply range18–28.0 V DC, four-wire system, less than 1 W
Output4–20 mA with HART bus, or RS-485
CommunicationHART / MODBUS bus
Fault output3.8 mA, 4 mA, 20 mA, 22 mA or maintain
Cable entryM20 × 1.5
Recommended cableAWG18 or 0.75 mm²

Mechanical and environment

Mechanical and environment
Field operation128 × 64 dot matrix display screen with 4 buttons; configurable upper computer setting software
Industrial temperature / humidity−40 to 85 °C, 95% RH
Shell materialAluminium alloy, stainless steel
Antenna typeLens antenna; optional lens antenna cover, anti-corrosion antenna, antenna heat dissipation paste, quartz isolation flange plate
Process pressure−0.1 to 2 MPa
Protection gradeIP68
Installation methodThread or flange
Net / gross weight2.480 kg / 2.995 kg

Commissioning

Commissioning
On-siteLCD with four buttons
PCUSB to RS485 serial cable (four-wire); USB to TTL serial cable (two-wire); USB to HART modem
MobileBluetooth debugging from a phone
Remote4G network through remote modules

Source · INDIANA INSTRUTECH · 76–81 GHz FMCW radar level meter — product user manual

C

Installation

Guidance from the product’s operating documentation.

  1. 01Align the instrument with the target material level and keep it perpendicular to the surface.
  2. 02Ensure there are no interfering objects such as ladders or steps within the beam range, and keep the beam clear of the feeding port.
  3. 03Install at least 20 cm away from the container wall, otherwise readings may be incorrect.
  4. 04In a conical container, direct the beam towards the bottom of the tank, otherwise bottom measurements may be inaccurate.

D

Applications and industries

Documented in the product literature, not inferred.

Applications

  • Solid level in silos and hoppers, including high dust environments
  • Liquid level in storage tanks
  • High-temperature process vessels up to +200 °C at the antenna

Industries

  • Cement
  • Mining and minerals
  • Chemical
  • Power generation
  • Water treatment

To specify or quote this, the team needs

  • Measuring range and tank height
  • Medium — liquid or solid — and its dielectric constant
  • Process temperature and pressure
  • Dust, foam or condensation conditions
  • Process connection — thread or flange
  • Output and communication required
  • Antenna accessories — cover, anti-corrosion, heat dissipation, quartz isolation flange
Request a Quote

E

Downloads

Branded PDFs generated from this page's own data — nothing in them that isn't on the site.

Technical sheetOverview, key values, gallery and applications — the selling document for 76–81 GHz FMCW Radar Level Transmitter.PDF · 0.2 MBFull specificationEvery stated value, variants, open points and ordering information.PDF · 0.2 MB

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