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Similar Detectors and Sensors picks priced within $6 of $3.00 ($0.00 – $9.00). 26 products found.

Found 9 products with a lower price than this one.

Best Amazon Beauty Detectors and Sensors Deals and Reviews, Make: Sensors Book – Special Deal for Arduino and Raspberry Pi Learning

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CQRobot 10.525GHz Doppler Effect Microwave Motion Sensor Compatible with Raspberry Pi and Arduino Motherboard. for Industrial, Measurement, Automatic Doors, Smart Lights, Reversing Radar, etc.

$2.00 Buy on Amazon

Sound Sensor Sound Detector Module for Arduino ESP32 ESP8266 Raspberry Pi Microcontroller Projects 3.3V 5V Compatible Adjustable Sensitivity Digital Output 2 Pieces

$1.00 Buy on Amazon

12PCS RCWL-0516 Motion Detection Sensor, Microwave Radar Sensor, Switch Module, for Arduino ESP8266 Nodemcu Wemos, for Raspberry PI, for Human Rat Cat Detector, Detection Distance 5-7m

$1.00 Buy on Amazon

WWZMDiB 5 Pcs PIR Sensor Compatible with HC-SR501 PIR Motion Module for Arduino Raspberry Pi STM32 (Comes with 2 Dedicated Cases)

$1.00 Buy on Amazon

HiLetgo 3pcs HC-SR501 PIR Infrared Sensor Human Body Infrared Motion Module for Arduino Raspberry Pi

$1.00 Buy on Amazon

Franklin Sensors ProSensor M70 Stud Finder with 7-Sensors, Wood & Metal Stud Detector/Wall Scanner, Made in The USA

$3.00 Buy on Amazon

Relaxweex 4 Pcs Recordable PIR Infrared Motion Sensor Activated Voice Motions Sensor Detector Welcome Doorbell Speaker Motion Sensors Door Chime Alarm Multiple Sounds Player for Play Speech

$4.00 Buy on Amazon

Driveway Alarm Wireless Outside, 1 BY ONE Motion Sensor Alarm 1000ft/300m Range Extra Loud Chimes Security Alarm System with 1 Receiver 2 Weatherproof Infrared Sensors Protect Indoor/Outdoor Property

$4.00 Buy on Amazon

Case for Franklin Sensors ProSensor MAX/ M210/ 710/710+/ T13/ T11/ X2100/ X1100 Stud Finder, Holder for Wood Metal Stud Detector, Wall Scanner, Plaster Tile Sensing Tool Bag (Box Only)

$4.00 Buy on Amazon

Lattice-mismatched Epitaxy for Fabricating HgCdTe Infrared Materials and Detectors (IOP Series in Sensors and Sensor Systems)

$4.00 Buy on Amazon

Remote Sensor Monitoring by Radio with Arduino: Detecting Intruders, Fires, Flammable and Toxic Gases, and other Hazards at a Distance

$2.00 Buy on Amazon

SONOFF SNZB-06P24 Zigbee Presence Sensor, 24GHz mmWave & Light Sensor, Zone Positioning, Self-Learning Calibration, Ceiling Mount, Works with Home Assistant, Alexa, SmartThings, Hub Required

$4.00 Buy on Amazon

X-Sense Wi-Fi Water Leak Detector (SBS50 Base Station Required), 3 SWS0A Water Sensors

$4.00 Buy on Amazon

meross Matter Presence Sensor MS605, Battery-Powered 4-in-1 Smart Motion Sensor with AI Learning, IP67 PIR & Light & mmWave Radar, Matter Over Thread, Supports Home Assistant, HomeKit, Alexa (1 Pack)

$4.00 Buy on Amazon

Motion Sensor Door Chime, Wireless Motion Detector Alarm Indoor, Business Entry Alert Bell with Buzzer, Doorbell for Home/Garage Door/Store, USB/Battery Powered,1 Receiver +2 Sensors

$5.00 Buy on Amazon

Discount Price on Transducers Sensors & Detectors – Amazon Great Value

$1.00 Buy on Amazon

Winees WiFi Water Leak Detector, 3 Pack Water Sensors(Hub Not Included), Easy Set Up, 100M Transmission for Basement, Bathroom, Laundry, IFTTT, S1 FSK(Accessory)

$5.00 Buy on Amazon

WiFi Water Leak Detectors for Home 3 Pack, Wireless Smart Water Leak Sensor, 120dB Adjustable Water Sensor Alarm Leak Detector, APP Alerts, 3 Water Sensors & 1 Hub for Kitchen, Bathroom, Sink, Laundry

$5.00 Buy on Amazon

WWZMDiB 5Pcs AM312 Mini Pir Motion Sensor Module HC-SR312 IR Human Sensor for Arduino

$1.00 Buy on Amazon

Ximimark 3Pcs MQ135 MQ-135 Air Quality Sensor Hazardous Gas Detection Module for Arduino

$1.00 Buy on Amazon

Franklin Sensors ProSensor M150/X990 Stud Finder with Live Wire Detection and 9-Sensors, Wood & Metal Stud Detector/Wall Scanner, Made in The USA

$6.00 Buy on Amazon

Franklin Sensors ProSensor T11/X1100 Stud Finder with 11-Sensors, Wood & Metal Stud Detector/Wall Scanner for Drywall, Made in the USA

$6.00 Buy on Amazon

Radiation Sensing: Design and Deployment of Sensors and Detectors

$7.00 Buy on Amazon

Franklin Sensors ProSensor 710+ Stud Finder with 13-Sensors, Wood & Metal Stud Detector/Wall Scanner, Built-in Bubble Level, Blue, Made in the USA

$8.00 Buy on Amazon

MOCREO WiFi Water Leak Detector Kit, 2000ft LoRa Long-Range, SMS App Email Alerts, Leak Severity Tracking, 105dB Adjustable Alarm, 5-Year Battery Life, 3 Smart Water Sensors for Home Basement Kitchen

$9.00 Buy on Amazon

Franklin Sensors Prosensor M210 Stud Finder With 13-Sensors, Wood & Metal Stud Detector/Wall Scanner, Live Wire Detection, Made in the USA

$9.00 Buy on Amazon