RADAR Level Transmitters

RADAR level transmitters allow simple and reliable non-contact level measurement of fluids in a metal tank. The microprocessor-controlled electronics transmit a 6.3 GHz electromagnetic pulse at the fluid's surface, which is then reflected back to the antenna. The "round trip" time of flight is then calculated to determine the fluid level in the container.

Pulsed RADAR can "see through" environments that would normally interfere with an ultrasonic type sensor, thus fuming and foams can be ignored in the field.

Our proprietary software senses and analyzes the amplitude and shape of the received echoes. This enables the units automatic gain control to track the process level and also eliminate false echoes from unwanted obstructions such as standpipes or tank walls.

The dielectric constant of a material is important to the proper operation of RADAR units. Each unit has the ability to work with materials that have a dielectric constant greater than 2.

A single push-button is used to set the zero and span. Calibration can be done in the vessel by varying the fluid level or the unit can be calibrated on the bench by aiming the unit at a suitable target. Factory pre-calibrated units are available.

The optional communication software allows the unit to be programmed with any personal computer. This software also enables diagnostics, data logging and special calibration, such as configuring the unit to work in a narrow pipe.

The zero and span points are independent of each other and fully adjustable over the units range.

Babbitt offers a complete line of Radars. These include 4 wire (115VAC), 3 wire (24VDC), 2 wire loop power, 2 wire loop power with HART 7 and Explosion Proof models. Please feel free to contact us directly at the factory to discuss which model is right for your application.

Product Features:

  • Simple push button calibration
  • 4-20mA or 20-4mA output
  • Non-volatile memory-batteries not required
  • Not affected by vapors or fumes
  • PLC compatible (Modbus RTU)
  • Field or bench calibration
  • Optional communication – RS232 or RS485

Liquid Applications:

  • Water/Wastewater
  • Food/Beverage
  • Chemicals/Acids/Caustics
  • Slurries



Power: 115VAC/60Hz, 230VAC/50Hz or 12-30VDC Output: 4/20mA or 20/4mA, 6.1uA resolution 750 ohms, isolated on AC supply Fuse: 0.125A/250V type 2AG


Process Entry: 2” NPT Conduit Entry: ½”NPT Antenna: Polypropylene (Standard); Teflon (Optional) Enclosure: Aluminum (Standard); Stainless Steel (Optional) NEMA 4 (IP65)


Temperature: 40 F to 140 F (Electronics),-40 F to 190 F (PP Antenna), -40 F to 250 F (Teflon Ant.)

Pressure: 150 PSI Max.

Approval: FCC Part 15 – Low communication Device


Range: 50 or 100 feet -Depends on model

Accuracy: +/- 0.25% of maximum target range in air.

Frequency: 6.3 GHz

Transmitter Power: 50uW average

Lost echo hold time: 30 seconds/output 22mA

Specifications subject to change without notice


Ordering Information
  200 = 2 Wire, Loop Power
300 = 3 Wire, DC Power
400 = 4 Wire, AC Power
Maximum Range
050 = 50 feet
100 = 100 feet
R = Radar  Options(Spell out)
Teflon Antenna
-SS Housing & Process Connection
-SS Process Connection
Communication RS232
Communication RS485
-HART 7 (2 Wire Only)
-Explosion Proof

Example Part # - ABM300-050-R-Teflon Antenna


Pulsed RADAR Level Transmitter

radar level transmitter