Gravity: Microwave Sensor (Motion Detection)

Rating:
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.
$16.10 AUD, inc GST
$14.64 AUD, exc GST

Available with a lead time
Expect dispatch between Mar 04 and Mar 11

Quantity Discounts:

  • 10-25 $14.20 (exc GST)
  • 25+ $13.91 (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.

- +

0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

Shipping:

  • $6+ Standard (5+ days*, tracked)
  • $10+ Express (2+ days*, tracked)
  • FREE Pickup (Newcastle only - must order online*)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

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:

  1. Non-contact detection
  2. Readings not affected by temperature, humidity, noise, air, dust or light - suitable for harsh environments
  3. Strong resistance to radio frequency interference
  4. Low output, unharmful to human
  5. Wide detection range and high velocity
  6. 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

Product Comments

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

  • $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
  • $6+ for Standard Post (typically 6+ business days, tracked)
  • $10+ for Express Post (typically 2+ business days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11+ for Pack and Track (3+ days, tracked)
  • $16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

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