Gravity: Microwave Sensor (Motion Detection)

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95% of 100

SKU: SEN0192 Brand: DFRobot

The microwave sensor applies the Doppler effect to detect moving objects using microwaves. This differs from the method used by a regular infrared (IR) sensor as microwave is sensitive to a variety of objects that are microwave-reflective, and its sensor readings are not affected by the ambient temperature.

$14.90 AUD, inc GST

$13.55 AUD, exc GST

Available with a lead time
Expect dispatch between Dec 02 and Dec 06

Quantity Discounts:

10-25 $13.14 (exc GST)
25+ $12.87 (exc GST)

Restrictions apply to this RF Equipment for use in Australia:

Only to be operated on 433Mhz / 915-930Mhz / 2.4Ghz (check the product description for compatible frequency ranges).
If operating outside of shared frequencies or in such a way that is beyond low interference potential devices are intended to function, then you have obtained the appropriate authorisation to do so.

For use in other locations around the world:

Follow region-specific frequency spectrum rules.

A declaration of use will need to be submitted during checkout.

The 10.525GHz microwave motion sensor applies the Doppler effect to detect moving objects using microwaves. This differs from the method used by a regular infrared (IR) sensor as microwave is sensitive to a variety of objects that are microwave-reflective, and its sensor readings are not affected by the ambient temperature.

This type of microwave sensor is widely used in industrial, transportation, and civil applications such as measuring vehicle speed, liquid levels, automatic door motion detection, automatic washing, production line material detection and car reversing sensors, etc.

We've tested this sensor in the warehouse and found a few tricks to getting it working. First, the data output pin is ACTIVE LOW and will only remain low for around 60ms, your code will need to be interrupt driven to register the detection. Additionally if you are using a 3.3V logic microcontroller like a Raspberry Pi Pico then you'll need to shift down the logic levels. Michael has a code example and more information over on our technical support forum.

The microwave detection method has the following advantages compared to other methods:

Non-contact detection
Readings not affected by temperature, humidity, noise, air, dust or light - suitable for harsh environments
Strong resistance to radio frequency interference
Low output, unharmful to human
Wide detection range and high velocity
Supports non-living object detection

Applications

The microwave sensor can be useful together with other sensors to enhance its measurement accuracy. For example, Microwave sensor could decrease the pseudo fault report rate of human motion detection. And it does a good job in safety & security work.

Specification

Working Voltage: 5V + 0.25V
Logic Level: 5V
Output: Active-Low
Working Current (CW): 60mA max., 37mA typical
Interface: Gravity 3-Pin interface(Digital)
Size: 48.5x63mm
Emission parameters:
- Detection Distance: 2-16M continuously adjustable
- Emission Frequency: 10.525 GHz
- Precision Frequency Setting: 3MHz
- Output Power (minimum): 13dBm EIRP
- Harmonic Emission: < -10dBm
- Average Current (5%DC): 2mA typ.
- Pulse Width (Min.): 5uSec
- Load Cycle (Min.): 1%
Reception Parameters:
- Sensitivity:(10dB S/N ratio) 3Hz to 80Hz
- Bandwidth: -86dBm
- 3Hz to 80Hz Bandwidth Clutter: 10uV
- Antenna Gain: 8dBi
- Vertical 3dB Beam Width: 36 degrees
- Level 3dB Beam Width: 72 degrees

Documents

Parts List

Microwave Sensor x1
Digital Sensor Cable x1

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