ARK120-THD Airducer® Ultrasonic Air Transducer for Chemically Harsh Environments

The ultrasonic ARK120-THD Airducer® Transducer from Airmar reliably delivers non-contact level, flow, distance and proximity measurement. The ARK120-THD operates at 125 kHz, has a sensing range from 15 cm to 5 m and it includes standard internal shielding and 8 mm M3 PCB standoffs.The ARK120-THD's rugged one-piece Kynar PVDF housing makes it suitable for chemically aggressive environments, and its threaded design facilitates installation in various applications.

Applications

Level measurement

Processing of food and beverages

Features

Installation in various applications is enabled by threaded design

US FDA compliant rugged one-piece PVDF housing

M3 PCB standoffs of 8 mm

Standard internal shielding

Options

Standard cable lengths offer complete assembly

Nut — 1.5" BSP thread

Extension sleeve of 12 mm

10 KΩ thermistors offer temperature compensation

Specifications

Peak operating frequency: 125 kHz ± 4%

Weight: 250 g (8.8 oz.)

Minimum transmit sensitivity: 102 dB re, 1 µPa/V at 1 m (at best transmit frequency)

Minimum receive sensitivity: −172 dB re 1 V/µPa (at best receive frequency)

Minimum and maximum sensing range^*: from 15 cm to 5 m

Typical sensing range: from 20 cm to 3 m (8" to 10')

Minimum parallel resistance: 500 Ω, ±30%

Free capacitance: 1000 pF ± 20% at 1 kHz

Maximum driving voltage: 800 V_pp at 2% duty cycle tone burst

Housing material: Kynar^® 720

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

Acoustic window: Kynar^® 720

Beamwidth: 12° ± 2° at −3 dB

^*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