Specifications:

• Model: RCWL-9610 (HC-SR04 compatible)
• Operating Voltage: 2.8–5.5V DC
• Signal Level: Same as supply
• Measuring Range: 2–450cm (practical 2–80cm)
• Resolution: 3mm
• Accuracy: ±3mm
• Beam Angle: <15°
• Trigger Pulse: 10µs HIGH
• Operating Current: <2mA
• Frequency: 40kHz
• Dimensions: 45 × 20 × 15mm
• Weight: 9g
• Library: NewPing (Arduino)
• Works with: Arduino, ESP32, Pico, STM32, Pi

Features:

• 4-pin plug-and-play (VCC, Trig, Echo, GND)
• 10µs trigger → instant distance
• 2–450cm range, 3mm accuracy
• 2.8–5.5V wide voltage
• <2mA ultra-low power
• Hidden I2C/UART mod pads
• 15° narrow detection angle
• HC-SR04 ultrasonic sensor – the world’s most popular distance eye for robots, now at Bangladeshi price! This HC-SR04 ultrasonic sensor shoots invisible 40kHz sound waves, catches the echo, and tells your Arduino the exact distance in 10µs.
• Two big eyes (transmitter + receiver) on a 45×20mm blue board. Just 4 pins: VCC, Trigger, Echo, GND. Send a 10µs HIGH pulse → wait → read Echo pulse width → distance = (duration × 0.0343)/2 cm. Done!
• Why 1,00,000+ Bangladeshi makers choose this HC-SR04 ultrasonic sensor: ✔ New RCWL-9610 chip = 2.8–5.5V wide voltage (works on 3.3V ESP32 too) ✔ Ultra-low 2mA sleep current – runs weeks on coin cell ✔ Secret mod pads: solder 10kΩ on M1/M2 → unlock I2C/UART mode ✔ 15° narrow beam – ignores side objects ✔ Waterproof versions available (ask in chat)
• Build obstacle-avoiding cars, smart dustbins, water-level alarms, drone altimeters – all with one HC-SR04 ultrasonic sensor.

What is the price of HC-SR04 Ultrasonic Sensor 2-450cm Distance Module For Arduino ESP32 and DIY Project in Bangladesh?

The latest price of HC-SR04 ultrasonic sensor in Bangladesh is Price: ৳110.00 taka for 1pcs Module. You can buy this product at better and cheaper price from our website and also you can visit our warehouse between work hours 10am to 8pm.

Buy HC-SR04 Ultrasonic Sensor 2-450cm Distance Module For Arduino ESP32 and DIY Project in Bangladesh from online at Dunia.com.bd.

In Bangladesh, you can get original HC-SR04 ultrasonic sensor From Dunia.com.bd . We have few collection of latest আরডুইনো এক্সেসরিজ to purchase. Order ইলেকট্রনিক মডিউল Online at our website Or Visit our warehouse to get your product at lowest price.

FAQ 

1. How far can HC-SR04 ultrasonic sensor measure?
   Theoretical 450cm, real-world rock-solid up to 80cm indoors. Beyond 2m use JSN-SR04T waterproof version.
2. Will it work with 3.3V ESP32?
   100%. New RCWL-9610 chip accepts 2.8–5.5V. Connect VCC to 3.3V, signals are 3.3V safe.
3. My reading jumps around – help!
   Add 100µF capacitor across VCC-GND, point sensor straight, avoid soft fabrics that absorb sound.
4. Can I use 5 sensors on one Arduino?
   Yes! Use NewPing library with different Trig/Echo pairs. Or trigger one-by-one to share Echo pin.
5. How to enable I2C mode?
   Solder 10kΩ on M1 (R2) & M2 (R3) pads on the back. Address 0x57. Code on GitHub (search “RCWL-9610 I2C”).
6. Waterproof or not?
   Board is not. For outdoor tanks buy JSN-SR04T (sealed transducer).
7. Minimum distance it can measure?
   2cm blind spot. Anything closer returns 0.
8. How to rotate for 360° scanning?
   Mount on SG90 servo → sweep 0–180° → build radar in 20 lines of code.
9. Echo pin stays HIGH forever?
   No object in range. Add timeout: NewPing sonar(12,11,200); // 200cm max.
10. Arduino code for distance?

    #include <NewPing.h>
    NewPing sonar(12,11); // Trig,Echo
    void loop(){ Serial.println(sonar.ping_cm()); delay(50); }