This is the 5mm variant of the Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe in Ultrasonic Sensors, Sensor Modules, Ultrasonic Sensors and Modules. Available at ₹379.96 (₹322.00 + GST) with free shipping across India.
Looking for Sr04m Module? Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is available at Zbotic with fast shipping across India.
Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe
The product uses a waterproof strip line probe that integrates transceiver and receiver with non-contact ultrasonic detection technology. It can measure the distance between plane objects accurately from 25cm to 450cm.The great advantage of using this Waterproof Ultrasonic Obstacle Sensor is you can put the sensing element far away from all the control circuitry.
Specifications
- Working Voltage : 3 – 5.5V.
- The maximum Current : 30mA 5V.
- Standby current : < 2mA 5V.
- Low power consumption : <20uA.
- The fastest range is : 8 meter
- Dead zone : 20cm.
- Resolution: 1mm
- Mileage angle: 70 degrees
- Range : 25cm to 450cm
- Range per objects :
- Distance from wall : 8 Meter,
- Distance from People : 4 Meter
Package Includes
- Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe
Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe Overview
The Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is a compact distance sensor featuring an 18.5 mm strip-line probe with integrated transmitter and receiver. Designed for non-contact measurement of planar objects, it offers reliable readings in wet or harsh environments up to 8 meters.
Key Features of Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe
- Waterproof strip-line probe with IP-rated housing for outdoor and submerged use
- Wide detection range: 20 cm to 8 m with 1 mm resolution
- Low-power operation: working voltage 3–5.5 V, max current 30 mA @5 V, standby <2 mA, sleep <20 µA
- Dead zone clearance from 20 cm for reliable close-range sensing
- Separate probe and control circuitry allow remote placement of sensing head
- Fast shipping from Zbotic across India; genuine modules sourced from authorized distributors
Applications and Use Cases
- Liquid level monitoring in tanks, reservoirs and sewage systems
- Obstacle detection and collision avoidance in outdoor robotics
- Distance measurement for conveyor control and packaging lines
- Security perimeter sensing and intruder alert systems
- Smart irrigation systems for precise plant spacing detection
How to Use Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe
Connect the module’s VCC (3–5.5 V) and GND to your microcontroller, wire the Trigger and Echo pins to GPIOs, then upload a simple timing sketch. Place the waterproof probe at the measurement point, trigger a 10 µs pulse on the Trigger line, and measure the Echo pulse width to calculate distance. Allow a 60 ms interval between readings.
Why Buy from Zbotic?
- Genuine Products: All items sourced from authorized distributors
- Fast Shipping: Orders ship within 24 hours with tracking (non backordered products)
- Free Shipping: Free delivery on qualifying orders
- COD Available: Cash on Delivery, UPI, cards, net banking
- Technical Support: Expert help for setup and troubleshooting
- Easy Returns: Hassle-free replacement for defective products
Frequently Asked Questions
What is the minimum and maximum detection distance?
This module reliably measures distances from 20 cm up to 8 m, with a close-range dead zone of 20 cm where echoes are not detected.
Can the AJ-SR04M-18.5MM Probe be used underwater?
Yes, the waterproof probe and IP-rated housing allow short-term immersion and continuous operation in high-humidity or splashing environments.
How do I interface the ultrasonic module with a microcontroller?
Supply 3–5.5 V to VCC/GND, connect Trigger to a digital output, Echo to a digital input, then measure the echo pulse width in your firmware to compute distance.
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Read More →Technical Specifications
| Model | AJ-SR04M-18 |
|---|---|
| Size | 18.5mm |
| SKU | AI0686 |
| Weight | 0.05145 kg |
| Availability | Out of Stock |
Applications & Use Cases
The Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is a versatile ultrasonic sensors used across a wide range of applications including electronics projects, DIY builds, prototyping, and educational experiments.
Common use cases:
- Integrating into a custom electronics project
- Learning and experimenting with circuits
- Replacing or upgrading components in existing setups
This product is ideal for electronics enthusiasts, engineers, and students.
Technical Tip: Always verify voltage and current requirements before connecting to your circuit. Check datasheets for detailed specifications and pin configurations.
Shipping & Delivery
- Free shipping on orders above ₹999 across India
- Dispatched within 1-3 business days
- Expected delivery: 3-7 business days depending on location
- Secure packaging to ensure safe transit of electronic components
Milan Rathore (verified owner) –
Outstanding accuracy from this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Compared with a professional instrument, readings match closely.
Anand Bhandari (verified owner) –
This Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is excellent for the price. My data logging project is working perfectly now.
Himanshu Singh (verified owner) –
Very satisfied with this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Library support is good and it’s easy to interface.
Tanmay Bisht (verified owner) –
Outstanding accuracy from this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Compared with a professional instrument, readings match closely.
Sandeep Modi (verified owner) –
This Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is excellent for the price. My data logging project is working perfectly now.
Vikram Agarwal (verified owner) –
Love this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Response time is fast and readings are stable.
Hardik Trivedi –
Perfect for my weather station. This Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe gives consistent readings day and night.
Rishabh Deshpande (verified owner) –
Great quality Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Calibrated it easily and the accuracy is impressive.
Nikita Saini (verified owner) –
Outstanding accuracy from this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Compared with a professional instrument, readings match closely.
Nikita Bajaj (verified owner) –
Good quality Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Some variation in readings but within acceptable range.
Arjun Trivedi (verified owner) –
Outstanding accuracy from this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Compared with a professional instrument, readings match closely.
Om Grewal (verified owner) –
Average Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Readings fluctuate a bit. Works for rough measurements.
Darshan Chopra –
Great quality Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Calibrated it easily and the accuracy is impressive.
Sanjay Shah (verified owner) –
Bought this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe for my college project. Accurate readings, easy to code. Very happy!
Shreyas Negi (verified owner) –
This Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe is excellent for the price. My data logging project is working perfectly now.
Kiara Deshpande –
Very satisfied with this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Library support is good and it’s easy to interface.
Sonali Dhawan (verified owner) –
Superb Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe! Using it in my environmental monitoring system. Very reliable data.
Jayesh Iyer (verified owner) –
Good Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Works as described. Calibration needed some patience but results are good.
Girish Khanna –
Perfect for my weather station. This Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe gives consistent readings day and night.
Bharat Bisht (verified owner) –
Good Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Works as described. Calibration needed some patience but results are good.
Lakshmi Grewal –
Love this Waterproof Ultrasonic Module AJ-SR04M-18.5MM Probe. Response time is fast and readings are stable.