DEVMO 5A Range AC and DC Current Sensor Module ACS712 Module Highly Sensitive Humidity High Efficient Compatible with Ar-duino 5A

$14.58

Sustee Aquameter, Set of 5, Plant Soil Moisture Sensor (Green, Small)

$15.99

DIY Kit Metal Detector Kit Electronic Kit DC 3-5V 60mm Non-Contact Sensor Module

$11.8

General Tools Digital Moisture Meter MMD7NP - Humidity Sensor- Pinless and Non-Invasive

$14.98

ECOWITT WH51 Soil Moisture Sensor Soil Humidity Tester - Accessory Only, Can Not Be Used Alone

$9.99

DEVMO 30A Range AC and DC Current Sensor Module ACS712 Module Highly Sensitive Humidity High Efficient Compatible with Ar-duino 30A

$135

DAOKI 5PACK Vibration Sensor Module SW-420 Motion Alarm Switch Detector Electronic DIY Kit for Arduino with Dupont Cable

$6.99

AcuRite Wireless Indoor Outdoor Temperature and Humidity Sensor (06002M) , white

$21.68

Moen Smart Wireless Soil Sensor, Automatic Moisture Meter Measurement for Lawn, Plant Water Meter for Exterior Enclosures, WISNS002G1USA,Black

$26.99

Classy Casita Soil Moisture Meter - Hygrometer Sensor Tool for Indoor and Outdoor Plants - Monitoring Water Levels in Soil House, Gardening, Farm, Lawn, Potted Care - No Batteries Required - White

$7.99

Dorhea 3Pcs Metal Detector Kit Electronic Practice Kit DC 3V-5V 60mm Non-Contact Sensor Board Module DIY Electronic Part Metal Detector

$44.66

General Tools Moisture Meter MMD950 - Humidity Sensor - Pin Type / Pinless Device - Spherical Sensor

$59.99

VODESON 4in1 Plant Soil Moisture Meter with 230ft RF Wireless Includes Battery-Waterproof & LCD Display for Moisture,Temp,Sunlight,Time,Ideal for Garden, Farm, Lawn Care-Outdoor Plant Monitoring

$12.99

Measuring and Logging Soil Moisture Temperature Humidity PH NPK Sensor with HMI Touch Screen

$158

CQRobot Ocean: Contact Water/Liquid Level Sensor Compatible with Raspberry Pi/Arduino. for Automatic Irrigation Systems, Aquariums, Plants, in The Garden, in Agriculture etc.

$12.61

EC Buying 5Pcs SW-420 Vibration Sensor Module Vibration Switch Alarm Sensor Module for Arduino

$8.19

EC Buying TDS Water Quality Detection Sensor Module with XH2.54-3Pin Dissolved Solids Module Power Supply Voltage 3.3~5.0V Water Quality Detection Suitable for ARDUINO/51/stm32/DIY TDS Tester

$385

HiLetgo TDS Sensor Water Conductivity Sensor Liquid Detection Sensor Water Quality Monitoring Sensor Module TDS Monitor Kit Analog Output

$139.99

Getting Started with Sensors: Measure the World with Electronics, Arduino, and Raspberry Pi

$11.48

Gouevn Soil Moisture Meter, Plant Moisture Meter Indoor & Outdoor, Hygrometer Moisture Sensor Soil Test Kit Plant Water Meter for Garden, Farm, Lawn (No Battery Needed)

$7.99

Pinless Moisture Meter,MESITOOL Wall Moisture Reader for Water Leak Detector,Infrared Water Leak Detector for Lumber Humidity Tester

$26.99

Santronics 3115 AC Voltage Sensor

$11.98

DKARDU 50 pcs SW-18020P High Sensitivity Spring Vibration Switch Electronic Vibration Sensor 12V 2MA Water Proof dust-Proof

$5.69

WayinTop 2pcs ACS712 Hall Effect Current Sensor Module 30A Range ACS712 Module + 2pcs Voltage Sensor Module DC0-25V Voltage Tester Terminal Sensor for Arduino

$11.58

AcuRite Wireless Digital Rain Gauge with Self-Emptying Collector with Rainfall History, Alerts, and Current Date and Time (00899), Multicolor

$9.99

Calculated Industries 7445 AccuMASTER Duo Pro Pin & Pinless Moisture Meter Detects Hidden Leaks and Moisture | Combo Non-invasive Pad + Pin Sensors | for Restoration Contractors, Woodworkers, DIYs

$33.98

3 Pack KY-015 Smart 3pin DHT-11 DHT11 Digital Temperature and Relative Humidity Sensor Module + PCB DIY Starter Kit

$94

Teyleten Robot DHT22 / AM2302 Digital Temperature Humidity Sensor Module for Arduino Replace SHT11 SHT15 (3pcs)

$8.99

UMLIFE 3pcs ACS712 Hall Effect Current Sensor Module 30A Range ACS712 Module + 3pcs Voltage Sensor Module DC0-25V Voltage Tester Terminal Sensor for Arduino Raspberry Pi

$6.39

Gikfun DS18B20 Temperature Sensor Waterproof Digital Thermal Probe Sensor for Arduino (Pack of 5pcs) EK1083

$8.98

Temperature/Humidity Sensor by SensorPush for iPhone/Android. Water Resistant, Made in USA

$49.99

DiGiYes 5Pcs 3.3V/5V Analog Ceramic Piezo Vibration Sensor Module Fit for Arduino DIY Kit, Analog Signal Output Piezoelectric Sensor

$7.49

DAOKI 5PACK piezoelectric Ceramic Vibration Sensor piezo 3.3V/5V Module Analog Controller Electronic Components Supplies Sensor for Arduino with Dupont Cable

$10.99

Taidacent Non Contact Liquid Level Sensor Contactless Water Level Sensor Externally Attached Pipe Water Float Switch NPN Output Capacitive

$10.99

PANCKY Metal Detectors for Adults Waterproof - Professional Higher Accuracy Gold Detector with LCD Display, 5 Mode, Advanced DSP Chip 10" Coil Metal Detectors - PK0075

$109.99

Topvico Water Leak Sensor Detector Flood Alarm for Basement 120dB Work Alone Battery Operated 3 Packs

$240.9

Hiletgo 5pcs SW-420 Vibration Sensor Module Vibration Switch Alarm Sensor Module for Arduino

$8.49

HiLetgo 5pcs Piezoelectric Sensor Analog Ceramic Vibration Sensor Module Piezoelectricity for Arduino DIY KIT

$1.08

Stainless Steel Float Switch, High Temperature Resistant AC DC Compatible Liquid Sensor Float Sensor Liquid Switch, 75mm

$13.48

Caltric Thermal Switch Water Sensor Compatible with Arctic Cat 3530-005, 3530-057, 3430-038

$9

Turbidity Sensor Liquid Suspended Particles Water Turbidity Detection Module Detection Module kit Industrial Control

$429

Hathdia Soil Moisture Meter,Plant Hygrometer Moisture Sensor Plant Water Monitor for Potted Plants,Garden,Farm, Lawn(No Battery Needed)

$7.97

UEi DTH35 Digital HVAC Psychrometer Thermo-Hygrometer, Portable Relative Humidity Meter, Handheld Electronic in-Duct Thermometer, Measures Wet Bulb Dry Bulb Dew Point Temperature Humidity

$239.9

HiLetgo BME280 3.3V Atmospheric Pressure Sensor GY-BME280-3.3 Temperature Humidity Sensor Module for Arduino

$8.99

CQRobot Ocean: Non-Contact Water/Liquid Level Sensor Compatible with Arduino, Raspberry Pi and Other Motherboards. for Industrial Production, Aquarium, Chemical Liquid, Agriculture, Gardening, etc.

$9.99

ACS712 Hall Effect Current Sensor Module 5A 20A 30A Range + Voltage Sensor Module DC0-25V Voltage Tester Terminal Sensor for Arduino

$6.88

Gikfun DS18B20 Waterproof Digital Temperature Sensor with Adapter Module for Arduino (Pack of 3 Sets) EK1183

$7.99

General Tools MMD4E Digital Moisture Meter, Water Leak Detector, Moisture Tester, Pin Type, Backlit LCD Display With Audible and Visual High-Medium-Low Moisture Content Alerts, Grays

$41.97

3PCS 5A Range Current Sensor ACS712 Module AC/DC for Arduino (5A)

$12.99

LUOYIMAO Wired Water Liquid Level Sensor Dual Ball Stainless Steel Float Switch Silver Tone (150mm-S)

$38.37

Raintrip Soil Moisture Meter,Moisture Meter for Plants，Plant Water Meter,Great for Garden, Lawn, Farm, Indoor & Outdoor Use (No Battery Required)

$13.99

Water Conductivity Sensor, Domestic Water Hydroponics Sensor with Waterproof Probe for Liquid Quality Monitoring Detection Tester Module Parts

$9.95

Landtouch Soil Moisture Meter, Moisture Meter for Plants, Moisture Meter for Soil, Garden, Farming, Potted Plants, Indoor & Outdoor, No Batteries Required

$19.68

ThtRht 20 Pack SW-200D Metal Ball Tilt Switch Sensor Angle Balance Bead Vibration Sensors Transducer Instead of Mercury Switches Highly Sensitive for Arduino Raspberry Pi DIY Electric Vehicle Alarm

$7.99

Wood Moisture Meters, Pin & Pinless 2 In 1Moisture Detector with Upgraded Sensor & Backlit Screen, 9 Calibration for moisture Detection in Wood, Water Leak Detector for Lumber Concrete Building

$14.99

ALMOCN 6pcs 3.3-5V Digital Barometric Air Pressure Sensor Module Liquid Water Level Controller Board 0-40KPa for Arduino

$8.99

DAOKI 5Pcs ACS712 5A Range Current Sensor Module for Arduino

$9.99

4-in-1 Soil Moisture Meter Digital Plant Temperature/Soil Moisture/PH Meter/Sunlight Intensity/Environment Humidity Backlight LCD display Soil Test Meter for Gardening, Farming and Outdoor Plants

$11.04

D-FLIFE 100pcs TTP223 Touch Switch Module Capacitive Sensor Switch DIY for Arduino Raspberry Pi

$17.49

DFRobot Gravity: Analog Turbidity Sensor for Arduino

$379