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24GHz MmWave Radar Presence Sensor Module

24GHz MmWave Radar Presence Sensor Module

Last price we saw

$49.99at VXB.com Bearings, last seen Oct 31

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Our take on the 24GHz MmWave Radar Presence Sensor Module

This is a bare mmWave radar module that detects human presence, including people who are sitting still or breathing, by sensing small movements at 24 GHz. It runs on 5V DC and draws about 80 mA on average, so it suits always-on projects. It is a component for makers and integrators, not a finished smart-home device: you supply the enclosure, wiring and logic. No current price was provided for this listing, so check the live comparison before buying.

Best forMakers building presence-aware lighting or HVAC controlESP32, Arduino and Raspberry Pi projects that need still-body detectionBathrooms and offices where PIR sensors fail on motionless peopleIntegrators who want a sensor they can wire into their own board
Pros
  • Detects stationary people, not just movement, unlike PIR
  • 24 GHz sensing works through plastic and glass housings
  • Wide -40 to 85°C range suits garages, attics and outdoor enclosures
  • Low average draw of about 80 mA at 5V
  • Small, cheap module that is easy to embed
Cons
  • Bare module: no case, no display, no app, no relay output
  • 0.75 m distance resolution is coarse for fine position tracking
  • Needs a 5V supply that can deliver over 200 mA at startup
  • Radar can false-trigger on fans, moving curtains or pets
  • Setup and threshold tuning take real work

24GHz MmWave Radar Presence Sensor Module prices at every store

  • VXB.com BearingsCheck price at VXB.com Bearings

24GHz MmWave Radar Presence Sensor Module price history

Lowest price we've seen: $49.99 on Oct 31 at VXB.com Bearings. Tracked across 1 store since Oct 31.

What reviewers say

Owners of 24 GHz presence modules generally report reliable still-body detection where PIR sensors drop out, but describe tuning as fiddly. Reception varies by board and firmware, so treat it as a project part rather than a plug-and-play sensor.

Pros
  • Catches people sitting still at a desk
  • Works through a plastic enclosure
  • Compact and inexpensive
Cons
  • False triggers from fans and moving objects
  • Threshold tuning takes trial and error
  • Documentation is often thin

Specifications

Distance Resolution
0.75 m
Operating Frequency
2.4 GHz to 24.25 GHz
Power Supply
DC 5V, >200 mA
Average Current
80 mA
Ambient Temperature
-40 to 85°C

Questions and answers

Is it worth it over a PIR motion sensor?
Yes if you need to detect people who are still, such as someone reading or working at a desk. PIR is cheaper and simpler but goes blind when nothing moves.
Can it run on a Raspberry Pi or ESP32?
It needs a 5V supply able to deliver more than 200 mA, which a Pi or ESP32 board can usually provide. The data output is typically UART or GPIO, so check the specific board's interface before wiring.
Does it work through walls or cases?
It passes through plastic and glass covers, which is why it is often hidden behind a panel. It does not see through metal or thick concrete.
Will pets or fans set it off?
They can. Radar reacts to any movement in range, so fans, curtains and pets may trigger it until you adjust sensitivity and range.
What is in the box?
Usually just the module itself, sometimes with a header or cable. Expect to supply your own power wiring, enclosure and microcontroller.
When is it cheapest?
Module prices swing with seller and quantity, and small boards often drop during marketplace sales. Compare current listings rather than assuming a fixed price.