Microwave Radar Sensor
Microwave Radar Sensor
Microwave Radar Sensor
Microwave Radar Sensor
Microwave Radar Sensor
Microwave Radar Sensor

Microwave Radar Sensor

Sensors
DET508
Part.No: RCWL-0516
€2.25
In Stock
Immediate Dispatch
RCWL-0516 Microwave Radar Sensor module — a Doppler-based motion detector that works through walls and non-metallic obstacles, offering a wider detection angle and higher reliability than standard PIR sensors. Ideal for security systems, smart lighting, and presence detection projects.

 

The RCWL-0516 Microwave Radar Sensor (OEM) is a microwave Doppler radar motion detection module designed as a high-performance alternative to traditional PIR motion sensors. Unlike PIR sensors that rely on detecting infrared (black body) radiation emitted by a moving person, the RCWL-0516 actively emits microwave signals and analyzes the reflected signal for frequency shifts caused by movement — a technique known as the Doppler effect. This fundamental difference means the RCWL-0516 can detect motion through walls, plastic enclosures, and other non-metallic materials, making it far more versatile for embedded security and automation applications.

Key Features

  • Microwave Doppler Radar Technology: Actively emits and receives microwave signals → Detects motion through non-metallic obstacles, unlike PIR sensors
  • High Sensitivity: Capable of detecting subtle movements → Reliable triggering even for slow-moving subjects
  • Wide Detection Angle: Broad coverage area → Fewer blind spots compared to directional PIR sensors
  • Wide Supply Voltage Range: Flexible power input → Compatible with a wide range of microcontroller platforms
  • High Reliability: Not affected by ambient light, temperature changes, or air currents → Consistent performance in varying environmental conditions
  • Compact Module Form Factor: Easy to integrate into enclosures or PCB assemblies → Suitable for both prototyping and finished products

Typical Applications

  • Security Alarms & Burglar Detection: A direct replacement for PIR-based alarm triggers — works even when installed behind a wall panel or inside a plastic housing.
  • Automatic Security Lighting: Trigger outdoor or indoor lights upon detecting human presence, with more reliable sensing than infrared alternatives.
  • Smart Home Presence Detection: Use with ESP32 or Arduino to automate HVAC, lighting, or media systems based on room occupancy.
  • Industrial People Counting: Detect entry and exit movements in corridors or doorways for occupancy monitoring systems.
  • Contactless Switch / Gesture Trigger: Activate a relay or GPIO event without physical contact — useful for hygiene-sensitive or hands-free environments.

Technical Specifications

ParameterValue
Detection TechnologyMicrowave Doppler Radar
MPNRCWL-0516
CategoryArduino Modules

Frequently Asked Questions

Q: What is the difference between RCWL-0516 and a PIR sensor?
A: A PIR sensor passively detects infrared radiation (body heat) and requires a direct line of sight. The RCWL-0516 actively emits microwave signals and can detect motion through non-metallic materials such as plastic walls or enclosures, making it more versatile for concealed installations.

Q: Can the RCWL-0516 be used with an Arduino or ESP32?
A: Yes. The module outputs a digital signal when motion is detected, which can be read by any digital input pin on an Arduino, ESP32, or Raspberry Pi. Check the module's supply voltage requirements and use a logic level shifter if needed for 3.3 V systems.

Package Contents: 1 × RCWL-0516 Microwave Radar Sensor Module

⚠ Note: The RCWL-0516 emits microwave radiation during operation. Keep away from sensitive electronic equipment during testing. Always verify voltage compatibility with your microcontroller before connecting.
16 other products in the same category:
Product added to wishlist
Product added to compare.