Ultrasonic distance measurement sensors are essential tools for robotics, automation, and hobby projects. This guide highlights five reliable options that balance accuracy, power usage, and waterproof designs for challenging environments. Each product is summarized below with its standout features to help you pick the right module for distance sensing, obstacle avoidance, and precise ranging tasks.
Quick reference table
| Product | Brand | Key Strength |
|---|---|---|
| 2 Pcs Ultrasonic Distance Sensor | MakerHawk | High precision, low power, compact |
| EPLZON HC-SR04 Ultrasonic Module | EPLZON | High precision, multiple units |
| 2Pcs JSN-SR04T Integrated Sensor | ATNSINC | Waterproof, wide range, sturdy |
| 2PCS DC3-5V Ultrasonic Sensor | GODIYMODULES | Split waterproof design, compact |
| Grove – Ultrasonic Distance Sensor | Seeed Studio | Pi-friendly, minimal I/O |
2 Pcs Ultrasonic Distance Sensor for Arduino High Precision
The MakerHawk module pair offers compact, easy-to-use ultrasonic sensors designed for Arduino enthusiasts. These transducers operate at 5V with a low static current of 5mA and a total working current of 30mA, supporting energy-efficient operation in battery-powered projects. They deliver high measurement accuracy with a resolution around 0.5 cm and a maximum range of 5 meters, suitable for precise obstacle detection and distance measurement in tight spaces.
EPLZON HC-SR04 Ultrasonic Module Distance Sensor
The EPLZON HC-SR04 module includes a test mode that uses high-level IO triggers and an 8-pulse 40 kHz transmission for reliable echo detection. It covers a detection range from 0.78 inches to 196 inches (2 cm to 500 cm) with high precision up to 0.3 cm, and an effective angle under 15°. Trigger input pulses are 10 microseconds, making it straightforward to integrate with microcontrollers for precise distance sensing tasks.
2Pcs JSN-SR04T Integrated Ultrasonic Sensor
The JSN-SR04T from ATNSINC is an integrated, waterproof ultrasonic distance sensor with a 3-5.5V operating range and low power consumption (static 5mA, active 30mA). It measures from 25 cm to 4 m, with a 40 kHz operating frequency and a 75-degree detection angle. Its waterproof seal makes it suitable for wet or harsh environments, while offering reliable performance for robotics and environmental sensing. A 20 cm blind area should be considered in placement planning.
2PCS DC3-5V Ultrasonic Sensor Waterproof Split Module
This pair from GODIYMODULES features a waterproof split ultrasonic ranging module designed for 2 cm to 400 cm distances. It operates from 3-5 V and emphasizes ultra-low standby power. The kit includes a transmitter, receiver, and control circuit, with external software compatibility noted to align with HC-SR04 interfaces. It’s ideal for Arduino projects requiring waterproof sensing and easy integration.
PWM DC5V Ultrasonic Ranging Sensor with Waterproof Probe
The PWM ultrasonic sensor from GODIYMODULES uses a closed split waterproof design with IP67 protection for harsh environments. It runs on 5V and features a compact structure with fixed screw holes for straightforward installation. This module is suitable for projects that require reliable distance measurements in wet or dusty settings, while maintaining compact form factor and robust mounting options.
Grove – Ultrasonic Distance Sensor
The Grove Ultrasonic Distance Sensor from Seeed Studio is designed for easy integration with single-board computers like Raspberry Pi. It supports a voltage range from 3.2V to 5.2V, maintaining compatibility with 3.3V and 5V logic. Its standout feature is saving I/O resources by using time-division multiplexing, allowing three pins to monitor both transmit and receive signals. The effective measurement range spans from 3 cm to 350 cm, making it versatile for compact sensing tasks with minimal wiring.
Buying Guide
When choosing an ultrasonic distance sensor, consider the following factors to ensure the best fit for your project:
- Operating voltage and power consumption: Most modules operate at 3-5V. If your project is battery-powered, look for low static current and total current consumption to extend runtime.
- Measurement range and resolution: Typical ranges run from a few centimeters up to several meters. Select a model with the needed resolution (e.g., 0.3–0.5 cm) for precise obstacle detection.
- Accuracy and angle of detection: Narrower detection angles reduce false readings in cluttered spaces; consider the angle specification when aiming sensors at corridors or corners.
- Waterproof and environmental suitability: For outdoor or wet environments, waterproof variants (IP ratings) avoid damage and maintain consistent performance.
- Interface and compatibility: Ensure the module is compatible with your microcontroller (Arduino, Raspberry Pi, ESP32, etc.) and supports your preferred communication protocol and trigger method.
- Physical size and mounting: Compact, lightweight modules are easier to integrate into small robots or enclosures; check for screw holes and enclosure fitment.
- Multi-unit needs: If deploying several sensors, consider modules offering easy replication, multiple units per pack, and consistent performance across units.
- Noise and interference handling: Some sensors include gain control or filtering; evaluate these features if operating near motors or other ultrasonic sources.
In sum, select sensors that balance range, precision, power use, and environmental resilience for your specific application, whether it is obstacle avoidance in a mobile robot, level sensing, or distance measurement in a weather-dependent setting.