ARK75-THD Airducer® Ultrasonic Air Transducer for Chemically Harsh Environments

The ultrasonic ARK75-THD Airducer® Transducer from Airmar brings proven dependability to level, flow and distance measurement applications.The ARK75-THD includes standard internal shielding and 8 mm M3 PCB standoffs. Itoperates at 75 kHz and its sensing range is 20 cm to 10 m. The ARK75-THD's rugged one-piece Kynar PVDF housing makes it suitable for the most chemically aggressive environments.Its threaded design facilitates installation in various applications, and it can accommodate transceiver and signal processing electronics.

Applications

Level measurement

Flow monitoring

Food and beverage processing

Features

Standard internal protection

Rugged one-piece PVDF housing that is U.S. FDA compliant

8 mm M3 PCP standoffs

Threaded design makes it easy for installation in various applications

Options

Complete assembly offered with standard cable lengths

10 KΩ thermistors temperature compensation

Mounting caps offered in M32, BSPor NPT threads

Nut — 1.5" BSP thread

12 mm extension sleeve

Specifications

Peak operating frequency: 75 kHz ± 4%

Weight: 250 g (8.8 oz.)

Acoustic window: Kynar^® 720

Housing material: Kynar^® 720

Minimum and maximum sensing range^*: 20 cm to 10 mm (10" to 33')

Minimum parallel resistance: 150 Ω, ±30%

Minimum receive sensitivity: −165 dB re 1 V/µPa (at best receive frequency)

Minimum transmit sensitivity: 106 dB re, 1 µPa/V at 1 m (at best transmit frequency)

Beamwidth: 14° ± 2° at −3 dB

Free capacitance: 1850 pF ± 20% at 1 kHz

Typical sensing range: 25 cm to 7 m (10" to 23')

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

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

^*Pulse-Echo Mode. Maximum and minimum ranges are best-case scenarios. Depending on signal processing and drive circuitry, the actual range may vary.

Acoustical Data

Image Credit: AIRMAR Technology Corporation

Dimensional Drawings

Image Credit: AIRMAR Technology Corporation