10 best detector under $5.00
We picked 10 detector from AliExpress with real orders and good reviews. Prices go from $1.09 to $4.10, the average rating is 4.9 stars and the most popular one has 242.8k orders. Every product opens on AliExpress, where you pay with buyer protection.
Updated: 2026-11
- 1
-61%Wireless LED Night Lights Motion Sensor Lights Closet Kitchen Night Lights Bedroom Detector Light Ca$2.20 $5.68★ 4.9 · 242.8k soldView on AliExpress → - 2
-61%395nm UV Pen FLaslight,Blacklight Flashlight w/ Clip Portable Detector for Hotel/Pet Urine$2.49 $6.44★ 4.9 · 88.4k soldView on AliExpress → - 3
2/4pcs Fish Tank Thermometer with Suction Cup Temperature Sensor LCD Digital Aquarium Water Temp Detector$1.41★ 4.9 · 10.2k soldView on AliExpress → - 4
-58%Zigbee 24G Mmwave Radar Presence Sensor Human Detector Motion/Static Detection For Tuya Z2$3.68 $8.74★ 4.9 · 10k soldView on AliExpress → - 5
-57%Aoyan Zigbee 3.0 Mini PIR Motion Sensor Human Motion Infrared Detector Security Alarm Work$2.84 $6.66★ 4.9 · 10k soldView on AliExpress → - 6
-57%Tuya Zigbee Water Sensor Flood Leak Detector Water Linkage App Alarm Sensor for Kitchen/Ba$4.10 $9.50★ 4.9 · 10k soldView on AliExpress → - 7
-54%Inductor Detector Tool Motherboard Coil Tester for Phone Motherboard Repair Electromagneti$1.51 $3.30★ 4.9 · 10k soldView on AliExpress → - 8
-57%1-10pcs HC-SR501 Adjust IR Pyroelectric Infrared PIR Motion Sensor Detector Module For Ard$1.78 $4.10★ 4.9 · 5k soldView on AliExpress → - 9
-82%Tuya Zigbee Wireless Door Windows Sensor Mini Smart Home Wireless Door Detector Door Open Closed Alarm$1.09 $6.11★ 4.8 · 1.5k soldView on AliExpress → - 10
Tuya WiFi Smart Water Leak Sensor Liquid Leakage Alarm Overflow Level Detector Flood Protection SmartLife APP$1.09★ 4.8 · 1.4k soldView on AliExpress →
Prices and ratings come from AliExpress and can change. We may earn a commission when you buy through our links, at no extra cost to you.