• Radar Level Transmitters

Radar Level Transmitters

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Radar level transmitters are ideal for a variety of water and wastewater applications

The WL900 Radar Level Transmitters offer a logical extension to ultrasonic devices, where application conditions are in need of non-contact liquid level measurement but ultrasonic level transmitter measurement is not acceptable.  The WL900 Radar Level Transmitters are ideal for a variety of water and wastewater applications where you have a reflective liquid that has a foaming surface, vapors, or dusty conditions beyond ultrasonic transmitter capabilities.  The Radar Level Transmitters are also unaffected by temperature, vacuums, pressure, methane, or CO2.

The WL900 Radar Level Transmitters use state-of-the-art radar pulse technology which provide accurate and reliable level measurements over their wide 10 inch to 50 foot range.  With their simple push-button calibration system, the WL900 Radar Level Transmitters are easy to set up and maintain on the bench or in the field by following simple instructions.  Simply aim the WL900 Radar Level Transmitters at your low range level set point and push the button to lock in the setting - do the same with the high level set point.  This may be done before permanently installing the Radar Level Transmitter by aiming the instrument at a wall and using a tape measure to determine your exact range.

The WL900 Radar Level Transmitter's rugged NEMA 4 (IP65) housing is available in either aluminum or 316L stainless steel for corrosive environments.  A standard 2 inch NPT(M) process connection allows for quick and versatile installation of the Radar Level Transmitter.  The Radar Level Transmitter's polypropylene antenna rod is virtually corrosion proof.


  • Accurate, non-contact measurement
  • Works in conditions where ultrasonic is not acceptable
  • Pulse radar measurement range 10 inches to 50 ft
  • Simple push-button calibration
  • Standard 4-20mA signal output
  • Optional RS485 digital output


  • WL900-AC Radar Level Transmitter (PN# AQE100)
    Power: 115VAC (60Hz),Enclosure: Aluminum
  • WL900-DC Radar Level Transmitter (PN# AQE200)
    Power: 12 to 30 VDC, Enclosure: Aluminum
  • WL901-AC Radar Level Transmitter (PN# AQE300)
    Power: 115VAC (60Hz),Enclosure: Stainless Steel
  • WL901-DC Radar Level Transmitter (PN# AQE400)
    Power: 12 to 30 VDC, Enclosure: Stainless Steel
PowerAC: 115 VAC, 60 Hz (± 20%),1.7 VA
DC: 12 to 30 VDC, 0.07 Amps max. @ 24 VDC
Outputs Signal: 4-20 mA, 6.1 μA resolution; 750 ohms
Communication: RS-232
Accuracy±0.25% of max. sensor range (in air)
Frequency6.3 GHz(or 5.8 GHz CE)
Measurement Range10 inch to 50 ft (0.254 to 15.2 m)
Resolution 0.22 in (5.7 mm)
Transmitter Power50 μW average
Calibration Push-button or optional programmable
Antenna Polypropylene over dielectric rod
Beam Angle12 degrees
Operating Temperature-40 to 60°C(-40 to 140°F)
Operating Pressure150 psi max
Installation Category Class II
Process Connection2 inch NPT
Conduit Entry 1/2 inch NPT standard
Housing Aluminum or 316L stainless steel
Ingress Protection NEMA 4 (IP65)
Approvals FCC Part 15 - low-power communication device
Weight 3.6 lbs (1.63 Kg)
Dimensions 4 in dia. x 18 in long (10cm dia. x 45.7cm long)