AT75 Airducer® Ultrasonic Air Transducer for Level, Distance and Flow Applications

Airmar's ultrasonic AT75 Airducer® Transducer reliably delivers non-contact level, flow and distance measurement. It operates at 75 kHz and its sensing range is 20 cm to 10 m.The AT75 is available as an AR model with threaded cap. The AT75 Airducer® Transducer includes rugged sealed construction, and PVDF housing is available for more chemically aggressive environments.

Applications

Open channel flow

Obstacle avoidance

Proximity

Robotics

Level measurement

Features

Installation in various applications enabled by cylindrical design

Rugged sealed construction

AIRMAR AT75 Ultrasonic TransducerPlay

Video Credit: AIRMAR Technology Corporation

Options

10 KΩ thermistor available for temperature compensation

Available in PVDF housing for use in chemically aggressive environments

AR style with threaded cap available

Specifications

Peak operating frequency: 75 kHz ± 4%

Typical sensing range: 25 cm to 7 m (10″ to 23′)

Minimum parallel resistance: 170 Ω, ±30%

Minimum transmit sensitivity: 111 dB re, 1 µPa/V at 1 m at best transmit frequency

Minimum and maximum sensing range^*: 20 cm to 10 m

Minimum receive sensitivity: −162 dB re 1 V/µPa at best receive frequency

Weight: 45 g (1.6 oz.)

Free capacitance: 1850 pF ± 20% at 1 kHz

Operating temperature: −40 °C to 90 °C (−40 °F to 194 °F)

Acoustic window: glass-reinforced epoxy

Beamwidth: 15° ± 2° at −3 dB

Housing material: Glass-filled polyester

Maximum driving voltage: 1000 V_pp at 2% duty cycle tone burst

^*Pulse-Echo Mode: The best-case situations are the minimum and maximum ranges. Depending on the driving circuitry and signal processing, the actual range may vary.

Acoustical Data

Image Credit: AIRMAR Technology Corporation

Dimensional Drawings

Image Credit: AIRMAR Technology Corporation