Cylindrical ultrasonic transducer BBDM series

immersiblehigh-frequencydual-crystal

Overview
The BBDM series comprises 25 ultrasonic transducer models for industrial automation, robotics, vehicle detection, level monitoring and underwater measurement. The portfolio covers air distance, proximity and obstacle detection, external liquid‑level sensing through vessel walls, and underwater depth and target detection.

Intended use
BBDM transducers are sensing elements intended for integration with appropriate drive, receive and signal‑processing electronics. Detection range and measurement accuracy depend on medium, target size/reflectivity, mounting, electronics, temperature and nearby reflectors. Sample evaluation under actual operating conditions is recommended before finalizing a design.

Application examples

• Industrial automation: position sensing, distance measurement, proximity switching, object detection, part counting and double‑sheet detection.
• Robotics and mobile equipment: obstacle avoidance, proximity sensing and short‑range ranging in confined spaces.
• Vehicle and traffic systems: vehicle detection, traffic monitoring, parking assist and outdoor distance sensing.
• Liquid and material level monitoring: non‑contact level measurement in tanks and vessels for control and alarms.
• Through‑wall level sensing: external measurement of liquid level through tank walls without contact with the liquid.
• Outdoor and low‑temperature use: systems for outdoor equipment and cold‑storage with temperature compensation.
• Underwater ranging and detection: depth, distance and target detection in rivers, lakes, pools and tanks.
• Underwater positioning and fauna detection: obstacle and fish detection, single‑ or dual‑frequency depth systems with different beam coverages.
• Industrial liquid interfaces: distance measurement, liquid‑interface and sludge‑interface detection in process environments.

Air distance, level and proximity measurement
BBDM-14KR45M | 14 kHz ±2 kHz | Reference range 1–45 m | Blind zone <1 m | Beam 15° ±2° | IP65
BBDM-22KR30M | 22 kHz ±2 kHz | Reference range 0.8–30 m | Blind zone <0.8 m | Beam 15° ±2° | IP65
BBDM-30KR20M | 30 kHz ±2 kHz | Reference range 0.6–20 m | Blind zone <0.6 m | Beam 14° ±2° | IP65
BBDM-40KR12M | 40 kHz ±2 kHz | Reference range 0.35–12 m | Blind zone <0.35 m (or <0.4 m depending on version) | Beam 12°–15° | IP65 or IP66
BBDM-50KR8M | 50 kHz ±2 kHz | Reference range 0.3–8 m | Blind zone <0.3 m | Beam 12° ±2° or 14° ±2° | IP65
BBDM-50KR8MLT | 50 kHz | Reference range 0.3–8 m | Blind zone <0.3 m | Beam 12° ±2° | IP67
BBDM-75KR6M | 75 kHz ±2 kHz | Reference range 0.25–6 m | Blind zone <0.25 m | Beam 14° ±2° | IP65
BBDM-80KR6M | 80 kHz | Reference range 0.25–6 m | Blind zone <0.25 m | Beam 7° ±2° or 12° ±2° | IP65
BBDM-112KR4M | 112 kHz ±4% | Reference range 0.2–4 m | Blind zone <0.2 m | Beam 14° ±2° | IP65
BBDM-125KR3M | 125 kHz | Reference range 0.2–3 m | Blind zone <0.2 m | Beam 14° ±2° | IP65
BBDM-180KR2M | 180 kHz ±4% | Reference range 0.1–2 m | Blind zone <0.1 m | Beam 7° ±1° | IP65
BBDM-200KR2M | 200 kHz | Reference range 0.1–2 m | Blind zone <0.1 m | Beam 7° ±2° or 14° ±2° | IP65
BBDM-300KR0P5M | 300 kHz | Reference range 0.1–0.5 m | Blind zone <0.1 m | Beam 7° or 9° | IP65
BBDM-400KR0P3M | 400 kHz | Reference range 0.06–0.3 m | Blind zone <0.06 m | Beam 7° ±2° | IP65

Compact waterproof and open‑type air sensing
BBDM-40K | 40 kHz ±1 kHz | Beam 30°–80° depending on configuration | Φ14, Φ16, Φ18 and Φ25 mm waterproof packages; transmitter, receiver or dual-use versions
BBDM-40K-OPEN | 40 kHz ±1 kHz | Beam Φ10/12 mm: 80° ±15°; Φ14 mm: 90° ±15° horizontal, 70° ±15° vertical | Φ10, Φ12 and Φ14 mm open packages; separate transmitter or receiver versions
BBDM-58KR3M | 58 kHz ±1 kHz | Beam 70° horizontal; 30° ±15° vertical | Reference range 0.2–3 m; waterproof; transmit/receive compatible; 10 mm reference resolution

Underwater depth, ranging and target detection
BBDM-40K-UW | 40 kHz ±2 kHz | Beam 50° | 50–200 W; G1" thread; Φ65 × 86 mm
BBDM-200K-UW | 200 kHz ±4 kHz | Beam 14° ±1° | 20 W; ABS housing; fixed 6 m cable
BBDM-400K-UW | 400 kHz ±4% | Beam 5° | IP68 stainless‑steel housing; G1" thread; thermistor wiring
BBDM-500K-UW | 500 kHz ±3% | Beam 6° | IP68; max working pressure 1.6 MPa; M16×1 thread; Φ35 mm
BBDM-1M-UW | 1 MHz ±5% | Beam 6° | Approx. 50 mm blind zone; IP68; max working pressure 1.6 MPa; 0–95°C operating range
BBDM-40K200KR200M-UW | 40 kHz ±1 kHz / 200 kHz ±3 kHz | Beam 15° / 5° | Specified depth >200 m; G1" thread; Φ65 × 86 mm; temperature‑sensor wiring

External and dedicated liquid‑level measurement
BBDM-2MR2M | 2 MHz | Measurement range 0.015–2 m | Blind zone <15 mm | Beam 3° | External mount; IP67 aluminum housing; Φ36 × 14.6 mm; temperature signal leads
BBDM-500KR5M | 500 kHz | Measurement range 0.02–5 m | Blind zone <20 mm | Beam 8° | IP67 aluminum housing; Φ50 × 20 mm; temperature signal leads

Information for model selection

• Application and measurement medium: air, liquid, underwater or through‑wall sensing.
• Required minimum/maximum distance and blind‑zone constraints.
• Target size, geometry and surface reflectivity; nearby reflectors and installation environment.
• Required beam coverage and physical installation space.
• Operating temperature, pressure and ingress‑protection requirements.
• Available drive, receive and signal‑processing electronics or required interfaces.
• Housing size, thread/flange, cable and connector needs.
• Prototype requirement and expected production quantities.

Technical specifications

• Series: 25 BBDM ultrasonic transducer models covering air, liquid and underwater measurement.
• Center frequency range: ~14 kHz up to 1 MHz.
• Reference detection ranges: ~0.06 m up to >200 m depending on model and medium.
• Blind zones: down to <0.06 m for high‑frequency models; some underwater models ~50 mm.
• Beam angles: from ~3° (high‑frequency level sensors) to ~90° (open‑type units).
• Protection: IP65 to IP68; waterproof, open‑type, stainless‑steel and aluminum housings; some models rated to 1.6 MPa.
• Underwater features: G1" or M16×1 threads, thermistor wiring, fixed cables on specific versions, dual‑frequency options for deep measurements.
• Performance depends on medium, target, mounting and electronics; sample evaluation in actual conditions is recommended.