> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # mmWave Radar - Human Presence Detection **Type:** Product page · **SKU:** SEN0395 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia) **Page:** https://core-electronics.com.au/mmwave-radar-human-presence-detection.html ([markdown](https://core-electronics.com.au/mmwave-radar-human-presence-detection.html.md)) This 24GHz millimeter-wave radar sensor employs FMCW, CW multi-mode modulation, and separate transmitter and receiver antenna structure. In working, the sensor first... ## Pricing - **Price:** $48.05 (inc GST) — $43.68 AUD, exc GST - **Quantity discounts:** 6+ $41.50 (exc GST) · 12+ $39.75 (exc GST) ## Availability & dispatch - In stock, ships same business day if ordered before 2PM (Australia/Sydney). - We can dispatch 5 today, and up to 95 more in 8–12 days. ## Restrictions **For use in Australia** - Operate only in bands and with settings that are permitted for your location and application. Check this product’s supported frequencies in the description/specs. - If you intend to operate outside shared/licence‑exempt conditions (e.g. in other bands, at higher power, with high‑gain antennas, or extended duty cycles), you must have the appropriate authorisation. **For use in other regions** - Follow the spectrum rules for your country/region and select frequencies and settings accordingly. A declaration of use will need to be submitted during checkout. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0395:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0395:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description This 24GHz millimeter-wave radar sensor employs FMCW, CW multi-mode modulation, and separate transmitter and receiver antenna structure. In working, the sensor first emits FMCW and CW radio waves to the sensing area. Next, the radio waves, reflected by all targets which are in moving, micro-moving, or extremely weak moving state in the area, are converted into electrical signals by the millimeter-wave MMIC circuit in the sensor system. After that, these signals will be sent to the processor and processed through the related signal and data algorithms. Then, the target information can be solved out. The millimeter-wave radar can sense the human presence, stationary and moving people within the detection area. Moreover, it can even detect static or stationary human presence such as a sleeping person. There are two ways provided to output detection result: serial port and I/O port switch quantity. Besides that, the sensor module features strong sensing reliability, high sensitivity, small size, easy to be used or embedded in applications. ![](https://core-electronics.com.au/media/wysiwyg/product_images/sen0395-Board-Overview.jpg) **Connect Diagram** ## Features - Human presence sensing: sense if there is human body in areas. - I/O port switch quantity input and output control - Serial port input and output control - Strong anti-interference ability, not to be affected by snow, haze, temperature, humidity, dust, light, noise, etc. ## Specification - Power Supply: 3.6~5V - Operating Current: 90mA - Detection Distance: 9m - Equivalent Transmit Power: 13-15dBM - Beam Angle: 100\*40° - Modulation Mode: FMCW, CW - Operating Frequency: 24GHz - Operating Temperature Range: -40°C ~ 85°C - Baud Rate: 9600 - Dimension: 24\*28mm/0.94\*1.10" ## Documents - [Product wiki](https://wiki.dfrobot.com/mmWave_Radar_Human_Presence_Detection_SKU_SEN0395) - [MicroPython port and example](https://core-electronics.com.au/attachments/uploads/SEN0395-micropython.zip) ## Shipping List - mmWave Radar - Human Presence Detection ×1 ## Guides for this product - [Effective Ways To Detect People Using Common Sensors](https://core-electronics.com.au/guides/sensors/effective-ways-to-detect-people-using-common-sensors/) ## Videos for this product - [Effective Ways To Detect People Using Common Sensors](https://core-electronics.com.au/videos/effective-ways-to-detect-people-using-common-sensors) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0395.jpg)