The ultrasonic liquid level detector uses electromechanical transducer elements to emit and receive ultrasonic waves, which is very sensitive. With 40KHz crystal locking frequency, it can detect objects moving between 4m and 7m at a specific point, which is more reliable. The working voltage is 9-12DDC, which is ideal for door detection or point detection. The LED lamp indicates movement. Users can connect the output to an alarm or other application.
This manual describes the Sunstar ultrasonic matter position detector, which uses a 40 kHz ultrasonic transducer to detect the movement of objects within a 4‑7 m range. The device operates on a 9‑12 V DC supply and indicates motion with an LED.
The document includes basic operating principles, detailed assembly instructions, and recommendations for power supply and sensitivity settings to ensure reliable long‑term performance. This manual is written in Chinese.
| Detection range | 4–7 m |
|---|---|
| Supply voltage | 9‑12 V DC |
| LED indicator | LED shows movement |
| Output signal | High‑level on pin 8 when movement detected |
It requires an external 9‑12 V DC power supply.