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Ultrasonic proximity sensors are crucial components for a wide range of applications, from automated systems to smart home devices. Selecting the right sensor ensures optimal performance, accuracy, and reliability for your specific project. Understanding key features and considerations will help you make an informed decision.
NON-CONTACT DISTANCE SENSING: Add object detection to robot navigation, parking-distance prototypes, automatic lids, counters and interactive projects; each HC-SR04 uses a 40 kHz ultrasonic burst and echo timing to estimate distance
5-PACK FOR REPEATABLE PROTOTYPING: Use multiple HC-SR04 modules across builds, compare sensor positions or keep spares for testing and replacement; each module integrates an ultrasonic transmitter, receiver and control circuit
5 V MODULE WITH 3-450 CM RANGE: Connect VCC, Trig, Echo and GND, use a 10 µs trigger pulse and measure Echo duration; resolution is 0.3 cm with an effective angle under 15°, while the controller board and external power source are not included
PROTECT 3.3 V GPIO: The HC-SR04 operates from 5 V and its Echo output is 5 V, so use a voltage divider or suitable level shifting with 3.3 V inputs; keep the module dry and use it for prototyping rather than calibrated measurement
With a waterproof sealed emitter. This sensor is suitable for outdoor applications such as car reversing sensors, security alarms, industrial inspection, etc.
Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions. Please note that the device is waterproof, but it couldn't work underwater.
JSN-SR04T-V3.0 is updated to version 3.0, which solves the problem of blind spot data beating and improves the stability of the product.
The module consists of an ultrasonic sensor and a control circuit that includes a transceiver, compatible with all MCU work in the market.
HC-SR04 Ultrasonic Sensor：This is a device that can use sound waves to measure the distance of an object. It measures distance by emitting a sound wave of a specific frequency and listening to the bounce of that sound wave. The distance between the...
Working Voltage: 5V DC；Quiescent current: less than 2mA
Ranging Distance：2cm - 450 cm；High precision: 0.3 cm
High Sensitivity: The HC-SR04 Ultrasonic Module Distance Sensor has a ranging distance of 2cm to 500cm with a resolution of 0.3cm, allowing for accurate and precise distance measurements.
Easy Connection: The module features a simple mode of connection with VCC, trig, echo, and GND pins, making it easy to integrate into your projects.
Wide Application: This distance sensor can be used in various applications such as obstacle detection, object tracking, and distance measurement in robotics, automation, and IoT projects.
Low Power Consumption: With a quiescent current of less than 2mA, the sensor ensures minimal power consumption, making it ideal for battery-powered devices.
Test mode: Use IO to trigger high-level signals. (Not less than 10us), the module automatically sends 8 40kHz and detects whether there is a pulse signal return.
Detection area: 0.78~196 in/(2cm~500cm); high precision: up to 0.12 inch/(0.3 cm), effective angle: less than 15°; Trigger input pulse width: 10uS
Power supply: 5V DC; Quiescent current: less than 2mA;Dimension: 1.77 x 0.78 x 0.59 inches/45mm x 20mm x 15mm(length*width*height)
JSN-SR04T ultrasonic distance measuring module working voltage: 5V; Static current: 5mA; Total current work: 30mA; Working range: 21cm-5M; Working frequency: 40KHZ; Detecting angle: 50 degree
JSN-SR04T ultrasonic distance measuring module provides a measurement range of 21cm-500cm. Blind area is 25cm.
Ultrasonic distance measure module Small size, easy to use, strong anti-jamming, high accuracy, low voltage and low power consumption. JSN-SR04T integrated with sealed waterproof stripline probe, this sensor suitable for wet and harsh measurement...
JSN-SR04Tintegrated ultrasonic distance module for horizontal distance messurement,Obstacle avoidance, automatic control, Traffic control, Security, industrial control, has a variety of modes that can be modified manually, suitable for testing and...
La zona de detección: 0.78~196 pulg/ (2 cm-500 cm); Alta precisión: hasta 0.12 pulg/(0.3 cm) Ángulo efectivo: menos de 15°
Modo de prueba: utiliza el disparador IO para una señal de alto nivel. (No menos de 10us), el módulo envía automáticamente ocho pulsos de 40 kHz y detecta si hay una señal de pulso de retorno.
Fuente de alimentación: 5V DC; Corriente de reposo: menos de 2mA.
Distancia de prueba = ((Duración de alto nivel)*(Sónico: 340m/s))/2
Working voltage:DC3-5.5V, Static current:5mA, Total current work: 30mA. Working range: 25cm-4M, Working frequency: 40KHZ, Detecting angle: 75 degree. The JSN-SR04T ultrasonic distance measuring module provides a measurement range of 21cm-600cm. Blind area...
Integrated with sealed waterproof stripline probe, this sensor suitable for wet and harsh measurement occasions. Please note that the device is waterproof, but it couldn't work underwater.
Small size, easy to use, strong anti-jamming, high accuracy, low voltage and low power consumption. The module has a variety of modes that can be modified manually, suitable for testing and teaching experiments in different occasions.
Applications:It is widely used in horizontal distance ranging, obstacle avoidance, object distance measurement, car reversing sensors, security alarms, automatic control, security and industrial control, Intelligent traffic control and artificial...
Ultrasonic sensors work by emitting sound waves and measuring the time it takes for them to return after bouncing off an object. This time-of-flight measurement is then used to calculate the distance. Key technical specifications to consider include the sensor's sensing range (how far it can detect objects), its resolution (the smallest change in distance it can detect), and its accuracy.
Key Features to Consider
Sensing Range: Determine the maximum and minimum distances you need the sensor to detect. Sensors come with varying ranges, from a few centimeters to several meters.
Output Type: Sensors can have digital (on/off) or analog (variable voltage) outputs. Digital outputs are simpler for basic presence detection, while analog outputs provide more detailed distance information.
Environmental Factors: Consider the operating temperature, humidity, and potential for dust or water exposure. Some sensors are designed for rugged environments.
Power Requirements: Check the voltage and current needed for the sensor to operate, ensuring compatibility with your power supply.
Applications and Integration
Ultrasonic proximity sensors are versatile and find use in robotics for obstacle avoidance, in industrial automation for level sensing and object detection, and in smart home systems for automatic doors or lighting control. When integrating a sensor, consider its physical size, mounting options, and compatibility with your microcontroller or control system.
Choosing the Right Sensor
The best sensor for you depends on your specific needs. For simple presence detection, a digital output sensor with a suitable range might suffice. For applications requiring precise distance measurement, an analog output sensor with higher resolution and accuracy would be more appropriate. Always consult the sensor's datasheet for detailed specifications.
Frequently Asked Questions
What is the typical sensing range of an ultrasonic proximity sensor?
Sensing ranges vary significantly among ultrasonic proximity sensors. Some models are designed for short-range detection, from a few centimeters, while others can detect objects several meters away. The intended application will dictate the required range.
What is the difference between analog and digital output from an ultrasonic sensor?
A digital output sensor provides a simple on/off signal, indicating whether an object is within a predefined range. An analog output sensor provides a variable voltage signal proportional to the detected distance, allowing for more precise measurements.
Can ultrasonic sensors detect all types of objects?
Ultrasonic sensors work best with solid objects that reflect sound waves effectively. Soft, porous, or sound-absorbing materials may not be detected reliably. The angle of the object relative to the sensor also plays a role in detection.
How does temperature affect ultrasonic sensor performance?
Temperature can affect the speed of sound, which in turn influences the accuracy of distance measurements. Many sensors have built-in temperature compensation to mitigate this effect. However, extreme temperature variations can still impact performance.
Are ultrasonic sensors suitable for outdoor use?
Some ultrasonic sensors are designed with environmental protection for outdoor use, offering resistance to dust and moisture. However, factors like rain, extreme temperatures, and wind can affect their performance. It's important to choose a sensor rated for the intended outdoor conditions.
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