China ultrasonic ranging sensor is used for pedestrian sensing and water level detection of water tank

Short Description:

The A21-module is based on the use of a closed split waterproof probe. IP67 suitable for harsh environments.The 3cm small blind area is suitable for different detection conditions. It is a simple operation high-performance, high-reliability commercial-grade functional module.


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China ultrasonic ranging sensor is used for pedestrian sensing and water level detection of water tank,
Ultrasonic Level Sensor, Ultrasonic Sensor, waste bin sensor,
Features of the DYP-A21 module include millimeter resolution, 3cm to 500cm range, construction and severaloutput types: PWM pulse width output, UART controlled output, UART automatic output, switching output, RS485 output,ICC output,CAN output.

The sensor adopts a compact and sturdy PVC housing and meets the IP67 water intrusion standard. In addition, the A21 uses high output sound power, combined with continuously variable gain, real-time background automatic calibration and noise suppression algorithms to provide almost noise-free distance readings.

•wide voltage supply ,working voltage3.3~24V;
•blind area can up to 2.5cm minimum;
•The farthest range can be set, a total 5-level range of 50cm to 500cm can be set through instructions;
•A variety of output modes are available,UART auto / controlled, PWM controlled, switch volume TTL level(3.3V), RS485,IIC,etc. (UART controlled and PWM controlled power consumption can support ultra-low sleep power consumption≤5uA);
•The default baud rate is 115,200, Supports modification;
• Ms-level response time, data output time can up to 13ms fastest;
•Single and double angle can be selected, a total of four angle levels are supported for different application scenarios;
•Built-in noise reduction function which can support the 5-grade noise reduction level setting;
•Intelligent acoustic wave processing technology, built-in intelligent algorithm to filters interference sound waves, can identify the interference sound waves and automatically perform filtering;
•Waterproof structure design, waterproof grade IP67;
•Strong installation adaptability, installation method is simple, stable and reliable;
•Support remote firmware upgrade;

No. Feature Output method A21series model Remarks
1 Single angle UART auto output DYP-A21AYYUW-V1.0
2 UART controlled output DYP-A21AYYTW-V1.0
3 PWM pulse width output DYP-A21AYYMW-V1.0
4 Switch output DYP-A21AYYGDW-V1.0
5 IIC output DYP-A21AYYCW-V1.0
6 RS485 output DYP-A21AYY4W-V1.0
7 CAN output DYP-A21AYYCAW-V1.0
8 Double angle UART auto output DYP-A21BYYUW-V1.0
9 UART controlled output DYP-A21BYYTW-V1.0
10 PWM pulse width output DYP-A21BYYMW-V1.0
11 Switch output DYP-A21BYYGDW-V1.0
12 IIC output DYP-A21BYYCW-V1.0
13 RS485 output DYP-A21BYY4W-V1.0
14 CAN output DYP-A21BYYCAW-V1.1