Industry Background: Reliable Ultrasonic Sensing for Automotive Distance Detection
Vehicle parking assist, obstacle detection and short‑range distance measuring systems demand ultrasonic sensors with stable transmitting sound pressure, high receiving sensitivity and solid mechanical structure. Harsh working environments require sensors to resist vibration and deliver consistent detection performance. This 18 mm 40kHz pin‑out ultrasonic sensor manufactured by Guangdong SWT is specially optimized for vehicle ranging and obstacle‑sensing projects, widely adopted for parking‑aid and industrial proximity detection solutions.
About Guangdong SWT
Guangdong SWT is a professional manufacturer specializing in piezoelectric ceramics and ultrasonic electronic components. We possess complete in‑house production capacity including ceramic sintering, metal housing processing, component assembly and full‑parameter performance testing. Our product portfolio covers ultrasonic sensors, piezoelectric atomizing discs, piezo buzzers, electromagnetic buzzers and various ultrasonic transducers. Every batch of goods goes through strict quality validation before shipment to ensure stable performance for OEM and ODM bulk orders. Please visit our official website www.swt99.com to browse product catalogues, download datasheets and request samples.
Core Electrical Performance Parameters
This 18 mm ultrasonic sensor has a center frequency of 40±1.0 KHz, capacitance 1800±20% pF at 1000Hz. Transmitting sound pressure level ≥95 dB, receiving sensitivity ≥‑65 dB. Its ‑6 dB directivity is 60±10°, ringing ≤1.3 ms, maximum allowable input voltage reaches 120 Vp‑p. Operating temperature is ≤70℃. Pin terminal design simplifies PCB through‑hole mounting for control circuit boards.
Structural & Performance Advantages
Built with durable aluminum alloy housing, this 18 mm ultrasonic transducer offers good vibration resistance and structural sturdiness, well‑suited for on‑board vibration scenarios. Optimized directivity angle provides reliable short‑to‑medium distance detection, reducing false trigger signals. Low ringing characteristic helps improve near‑distance measuring accuracy. Pin‑type terminals support convenient through‑hole soldering for mass production assembly. Compact outer dimension keeps overall module size controlled for vehicle‑mounted equipment.
Wide Application & Procurement Support
This 18 mm 40kHz ultrasonic sensor is mainly used for vehicle distance measurement, parking assist systems, car obstacle detection, as well as industrial object proximity sensing and automated equipment ranging. Both small‑batch sample testing and large‑volume mass procurement are available. Supported by stable manufacturing capacity, strict quality control and factory‑direct pricing, it serves as a dependable sensing component for automotive and industrial ranging customers globally. For more technical documents, sample support and quotation, please visit our official website www.swt99.com.
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