2291 Contacting Radar Level Transmitter



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  • 19° beam angle
  • Large LCD display
  • Tank mapping function

2291 Contacting Radar Level Transmitter

The 2291 Guided Wave Radar level transmitter is designed for continuous level measuring of conductive or non-conductive liquids, pulps, and solids. The 2291 level gauge operates based on the well-known TDR (Time Domain Reflectometry) principle. Micro pulses are sent along a probe guide at the speed of light. As soon as the impulse reaches the surface of the medium, it is reflected back to the electronic module. Level distance is directly proportional to the flight time of the impulse. The reflected signal is dependent on the dielectric constant of the material; the feasibility of the measurement is εr ≥ 1.9. The TDR technology is unaffected by the properties of the medium as well as that of the space above it. Measurement is also unaffected by the change in the physical properties of the materials such as temperature, pressure, dielectric constant.

Features of the +GF+ Signet 2291 Contacting Radar Level Transmitter include:

  • Measuring range up to 6m (19.6 ft)
  • Accuracy: ± 5 mm (0.2 in)
  • PP / PFA coated probes available on request
  • Rod & cable versions available
  • Minimum εr 1.9
  • 2-wire version
  • Graphic LCD display
  • 4-20 mA + HART output
  • Medium temperature range: -30 °C… +90°C (-22 °F… +194 °F)
  • Maximum process pressure: 40 bar (580 psi)
  • IP67 protection

Typical Applications:

  • Inventory tanks
  • Day tanks
  • Process vessels for mixing & batching.
  • Buffer tanks
  • Bypass applications (requires calibration)
  • Stilling wells
  • Powders
  • Slightly conductive foams
  • Low dielectric constant liquids


Manufacturer: GF Signet

Part Ref: 2291-x-xx-x

IWN: LEV-003902

Media Type: Gases, Liquids, Powder

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Product Specification

The +GF+ 2291 Guided Wave Radar level transmitter is designed for continuous level measuring of conductive or non-conductive liquids, pulps, and solids.


Specification Detail of the Signet 2290 Non-contacting Radar Level Transmitter:


Measured values.

Level, Distance; Calculated values: Volume, Mass

Measuring range

0.2 m – 18 m (0.65 ft – 59 ft) (depending on r of the process liquid)


+/- 3 mm (0.1 inch)

Process Temperature

-30 °C… +100°C (-22 °C… +212°C),(up to 120 °C (248 °F) for max. 2 min); with PP antenna enclosure: max.: 80 °C (176 °F)

Process Pressure

25 bar at 120°C (248 °F); with plastic antenna enclosure: 3 bar at 25 °C (77 °F)

Measuring frequency

10…60 sec as per the application settings


Plastic (/PBT)

Beam Angle

Minimum 19°

Ingress Protection

IP 67

Process Connection

DN40 / 1 ½” BSP, 1 ½” NPT“ thread


4 – 20 mA + HART

Power Supply

20 V …36 V DC

General Approvals

ATEX (ia): II 1/2 G Ex ia IIB T6…T5 Ga/Gb, ICEX (ia): EX ia IIB T6…T5 Ga/Gb, CE, FCC

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