Posted in | Piezoelectric Sensors

AR41 Airducer® Ultrasonic Air Transducer for Level, Flow and Distance Applications

The AR41 Airducer® Transducer from Airmar reliably delivers unparalleled ultrasonic sensing performance with level, flow and distance measurement applications. It incorporates standard internal shielding, and it can accommodate transceiver and signal processing electronics. The AR41 operates at 41 kHz and its sensing range is 30 cm to 20 m. The AR41 Airducer Transducer includes rugged sealed construction, and PVDF housing is available for more chemically aggressive environments.


  • Proximity
  • Level measurement
  • Avoiding obstacles
  • Flow measurement
  • Traffic control


  • Rugged sealed construction
  • Housing design accommodates transceiver and signal processing electronics
  • Normal internal shielding


  • Full assembly comes with standard cable lengths
  • Mounting cap comes with BSP, M32 or NPT threads
  • Thermistors of 10 KΩ are considered optional for temperature compensation
  • Comes with PVDF housing for use in chemically aggressive environments


  • Weight: 560 g (1.2 lb)
  • Peak operating frequency: 41 kHz
  • Minimum transmit sensitivity: 110 dB re, 1 µPa/V at 1 m at best transmit frequency
  • Minimum parallel resistance: 150 Ω
  • Minimum receive sensitivity: −160 dB re 1 V/µPa at best receive frequency
  • Minimum and maximum sensing range*: 30 cm to 20 m (1 to 66″)
  • Free capacitance: 5000 pF at 1 kHz
  • Typical sensing range: 35 cm to 15 m (14″ to 49″)
  • Beamwidth: 14° at −3 dB
  • Maximum driving voltage: 1800 Vpp at 2% duty cycle tone burst
  • Operating temperature: −40 to 90 °C (−40 to 194 °F)
  • Acoustic window: Glass-reinforced epoxy
  • Housing material: Glass-filled polyester

*Pulse-Echo Mode. Maximum and minimum ranges are best-case scenarios. The actual range might differ depending on drive circuitry and signal processing.

Acoustical Data

AR41 Airducer® Transducer for Multiple Application

Image Credit: AIRMAR Technology Corporation

Dimensional Drawings

AR41 Airducer® Transducer for Multiple Application

Image Credit: AIRMAR Technology Corporation

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