Household Sensors & Alarms Categories
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Best Choice Mengshen 
Mengshen Motion Sensor Alarm, Wireless Doorbell Alert for Front Door Door Entry Driveway Mailbox Home Shop Visitors with Wireless Motion Sensor: Remote transmission, 280 meters in the open place, suitable for more places,SECRUI 
SECRUI Wireless Door Chimes When Entry for Business/Home/Office/Store (500ft Range 32 Chimes Adjustable Volume) Door Ope Easy to Install: The SECRUI door sensor installation operation is simple and does not require the use of any wiring or sBest Value Dogxiong 
4 Pack Security Window/Door Alarm, Door Open Chime, Magnetic Burglar Alert Sensor, Loud Door Alarms for Kids Safety, DIY Big LOUD ALARM – door window sensors loud enough to detects entry, prevent kids and babies going out the house, protectiSYNLETT 
SYNLETT Bed Alarm Caregiver Pager with Wireless Motion Sensor Alarm Indoor Fall Prevention for Elderly Monitoring Senior PORTABLE BED ALARM DEVICE: The portable bed alarms and fall prevention for elderly device is applicable at various areasHoneTeek 
Motion Sensor Detector Door Chime for Business Store Entry Alert, Welcome Buzzer Monitor Doorbell Alarm for Home Elderly ✨【Welcome Buzzer Monitor】The owners can use the doorbell to be alerted when people enter or leave. Use it to detect visiSlaige 
Motion Sensor Doorbell for Business Entry, Store Welcome Buzzer Monitor, Outdoor Door Chime Kit: Infrared Motion Sensor ❤️ 【Easy, Fast, Wire Free Installation】 Infrared sensor detects motion and sends a signal to the receiver. Chose from 36Generic 
Door Window Alarm - Window Sensors for Home Security - Anti-theft Alarms Security - Wireless Door Alarm System - 130dB L (Simplified Window Security) The device can be easily activated by vibrations. The alarm and flashing light will activatHIIXHC Personal Security Window & Door Alarm Bell | Wireless Sensor Door Window Burglar Alarm | Pack of 10 【Easy to use & User description】 Magnetic sensor switch detects your door or window. Easy stick installation and operatiMengshen Mengshen Motion Sensor Alarm, Driveway Entry Alert Support 5 Modes, 36 Tunes, Long Transmission Distance (Remote Control 5-In-1 Multifunctional: Receiver has 5 modes, Welcome/ Doorbell mode(36 Tunes available)/ Alarm/ Colorful light/ Night LGeneric Tuya ZigBee Wireless Vibration Sensor Motions Shock Real-time Alarms System Transducer Supply Household Warehouse Smart: This wireless vibration sensor is designed to be APP remote control so that you can know the home situation evenDaytech DAYTECH Door Alarm Sensor Volume Adjustable Door Open Chime 0-120 dB Window Alarm with 4 Modes for Kids Safety Dementia Volume Adjustable Door Alarm: This door alarm is used to alert you when a door or window is opened by 0-120DB alarm or dmeross meross Smart Presence Sensor, Matter Motion Detector with Light Sensor for Home Automation and Security, Pet Friendly, C Matter Multi-platform Compatibility: Use any Matter-supported hub (e.g., Amazon Echo, Google Nest) to control this presePlyisty Water Overflow Sensor Detector 120dB Water Leakage Alarm System, Simple Install, Low Power Consumption, Sensitive Sensor [EASY TO INSTALL AND USE] This water leak alarm is cleverly designed for simple installation and ease of use.Mengshen Mengshen WiFi Water Leak & Water Level Detector, 2-In-1 Tuya Smart Sensor Alarm Loud Volume APP Alert Monitoring with 6. 💧【Dual Sensor Water Alarm】2 in 1, including water leak probe and water level probe. It can not only detect water leaks,UanTii UanTii Smart Water Leak Alarm Sensor Tuya WiFi Water Leak Detector Flood Detector with 100dB Loudly Alarm Sound Works wi [APP Remote Control] Works with Smart Life/Tuya Smart App; Receive alarm push remotely at any time through the mobile phDaytech Daytech Door Sensor Chime Entry Alert Chime Wireless Door Window Open Alarm with 5 Volume Levels for Home Store Apartmen How This Door Open Sensor Alarm Works: Door sensors are devices that let you know when someone has opened a door. When dEPTTECH EPTTECH Smart TLC 2326-WF-S Tuya APP Efficient Solar Panel Rechargeable Battery Liquid Level Monitor WiFi Water Oil Tank LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.HENDUN HENDUN Motion Sensor Doorbell, Door Chime for Business, Store Welcome Buzzer Monitor, Commercial Door Entry Alert,Motion ✅EASY, FAST, WIRE FREE INSTALLATION sensor detects motion and sends a signal to the receiver. More than 1 transmitter SKCHUSHEN Solar Motion Sensor Alarm Outdoor Solar Alarm 120dB Loud Siren LED Strobe Lights Sound Security Alarm Adjustable Sensing 🥁 Solar Energy Alarm Light: this solar alarm strobe light can frighten away intruders and thieves by siren and strobe lMengshen Mengshen Door and Window Alarm, Anti-Theft Burglar Wireless Alarm with Remote Control for Home Security, Easy to Install Home Security Alarm: Super loud alarm of 105dB, scare thief away,Jectse Water Leak Alarm, 85 DB Household Wireless Water Leak Detector Sensor 9V,ABS Plastic,Flood Spot - Next to Bathrooms, Bas Automatic and high sensitivity. Once its three contactor touches the water, it will immediately send out a 85 dB alarm.Noorio Noorio Motion Sensor, App Alerts, Triggers Siren, 2-Year Battery Life, Broad Detection Range, Requires Noorio Smart Hub [Detection Range] Noorio motion sensor alarm detects motion that happens within 120 degrees, 32 feet. It is a perfect adMellisso Mellisso 3 Pack Solar Strobe Light with Motion Sensor Alarm 129DB Sound Security Siren IP65 Waterproof for Villa Farm Ya Long lasting:After fully under sunlight, the sound alarm can work for about 30 days. No worry run out of power.CPVAN CPVAN 125dB Loud Motion Sensor Alarm with 328ft Remote Control (40ft PIR Detector, Batteries), Indoor Wireless Infrared Super Loud and Easy to Use👉 CPVAN Motion Sensor Alarm is designed with 125dB alert device and simple operation, which cVEAUUTAY VEAUUTAY WiFi Smart Motion Sensor Alarms System Motion Detector Outdoor Weatherproof Wireless Infrared Security Motion D SHARED DEVICES: The WiFi Motion Sensor Alarm System is more secure. You can connect phone (Tuya) to share the device witBetterlink 1/2 Mile Long Range Solar Wireless Driveway Alarm System IP65 Weatherproof Outdoor Motion Detectors&Sensor 120dB Siren S Easy to install and expand: This wireless solar driveway alarm system is easy to install. It can be installed on walls,TELLUR TELLUR Smart WiFi Water Leak Alarm, Water Sensor, Phone App, Acoustic Alarm and Push Notification, Works with Typical LR EASY TO INSTALL AND USE - With TELLUR Smart App, Smart life app, tuya app (iOS & Android). independent use through interYUNFANG Door Sensor,WiFi Door Sensors Alarms Contact Wireless Door Window Magnet Entry Detector Sensor for Home Security APP tuy Door magnet is a safety alarm device used to detect whether doors, windows, drawers, etc. have been illegally opened oreMagTech eMagTech Water Leak Sensor Water Leak Sensor Detector 120dB Water Leak Alarm Detector Water Overflow Alarm Detector for Powerful Alarm: Boasting an ear-piercing 120dB alarm sound, the device ensures attention and action. The alarm persistsWuloo Solar Driveway Alarm Wireless Outside 1800ft Range, Outdoor Motion Sensor & Detector Driveway Alert System with Recharge Reliable & Dependable: 1/3-mile long range (1760 ft.; 536m) tested in real-world settings with trees, buildings, walls,SABRE SABRE Wired Water Leak Flood Alarm Sensor with 110 dB Siren - DIY Easy Installation PERSONAL PROTECTION YOU CAN TRUST: SABRE is the #1 pepper spray brand trusted by police & consumers & a leader in the pe20% Off Wuloo Solar Driveway Alarm Wireless Outside 1800ft Range, Outdoor Motion Sensor & Detector Driveway Alert System with Recharge Reliable 536M) Tested In Real-World Settings With Trees, Buildings, Walls, And Vehicles For An Accurate Measure Of WirelSukiola Sukiola Tuya Zigbee Human Presence Detector with Holder Smart Human Body PIR Sensor MmWave Radar Microwave Motion Sensor ZigBee Hub as Control Center:Tuya ZigBee gateway is required for this ZigBee human presence sensor,performing as the cenmeross Meross Smart Water Detector WLAN Water Alarm 3 Pieces for HomeKit, Water Sensor with Hub Compatible with Apple Home, Ale Remote monitoring and automation: compatible with Apple HomeKit, Alexa and SmartThings, easy to set up, monitor water leMETAK Water Leak Detector Sensor Alarm: Home Water Flooding Monitor Smart Sink Overflow Monitoring Adjustable Wet Moisture Ale Drip & Leak Alerts: Water leak detector alarm is designed with 4 rear water leakage detection probes and 2 front drip prWuloo Wireless Driveway Alarm 1800 Feet Long Range Motion Sensor Alert System Driveway Detector for Home with 1800mAh Recharge Reliable 536M) Tested In Real-World Settings With Trees, Buildings, Walls, And Vehicles For An Accurate Measure Of WirelDaytech DAYTECH Motion Sensor Door Chime, Wireless Doorbell for Business Entry with 3 Working Modes Welcome Infrared Motion Sens 【Motion Sensor Doorbells for Entry】Place the motion sensor at front door, the Receiver will sound to remind you that somAzdBvae High / Low Water Level Sensor Detector Alarm 120 dB Red Strobe Siren, Adjustable Alarm Volume, Sump Bobber Water leak Se 【High and Low Dual Probe Sensoe Design】- It can detect water shortage(low level) or overflow(hige level). You can chooseGuDoQi GuDoQi Water Leak Detector With Loud 130dB Alarm - Flood Sensor for Home Security, Bath Overflow Detection - Battery Inc Powerful 130dB alarm, easy to be heardSwitchBot SwitchBot Door Alarm Contact Sensor - Smart Home Security Wireless Window Alarm and Door Sensor, Add SwitchBot Hub Mini [Window & Door Alarm Sensor for Home Security] SwitchBot Contact Sensor can detect the opening/closing of doors and windWHAMVOX WHAMVOX Leak Detection Device Waterproof Water Leak Alarm Sensor for Home Safety Home flood protection: provides reliable protection against household water leaks, helping to prevent water damage and mintendvision Gas Leak Detector, Natural Gas Detector with 3-Sensitivity Adjustable, Temperature & Humidity Measurement, Audible & Vis 【3 in1 Portable Gas Leak Detector】This 3 in 1 gas leak detector is designed to combine the functions of gas leak detectoDaytech DAYTECH Door Alarm Sensor Window Alerts for Home Security 120dB Door Open Alarm with Low Battery Alert for Kids Safety D Door Alarms When Opened: DAYTECH Door alarm sensor can detect the opening/closing of doors and windows, guarding securitGoerpn 2 Pack Ultra Slim Window Alarm - 130dB Vibration Sensor for Security - Glass Break Alert for Home, Office, Dorm Room, RV 【Ultra Thin Window Alarm】A slim, modern shock sensor alarm designed for windows and doors.Meichoon Meichoon Wireless Motion Sensor Alarm Home Security Alert System Doorbell for Front Door Indoor Room Entry Driveway Mail ✨Wireless Motion Sensor - Remote transmission, 280 meters in the open place, suitable for more placesEPTTECH EPTTECH TLC2206 Tuya Smart Life Mobile APP Wireless WiFi Remote Ultrasonic Real-time Reminder Contactless Outdoor Waterp LONG MEASURING DISTANCE: 10cm to 3.0m(4 to 118 inches) from the sensor, which is suitable for different tanks.Daytech DAYTECH Freezer Door Alarm with Delay 1/2/3/4 mins When Left Open Window Chime Close Reminder Refrigerator Door Alarm 0 Freezer Door Alarm When Left Open: When the alarm and magnetic sensor are separated by more than 0.6inch(1.5cm), The alaPomya Wireless Security Keypad Alarm System, PIR Motion Sensor Alarm Password Keypad Remote Infrared Detectors with Panic Butt This Motion Sensor Alarm is for protecting your property against unwelcome intruders.tolviviov Water Alarm Detector 2 Pack, Sensitive Leak and Drip Alarm, 120dB Loud Alarm for Bathroom, Kitchen, Basement, Laundry, D 💎【120dB Alarm Water Sensor】The 120 dB alarm sound allows you to hear it anytime and anywhere at home, even if there isEPTTECH EPTTECH Smart TLC 2326-WF-S Tuya APP Efficient Solar Panel Rechargeable Battery Liquid Level Monitor WiFi Water Oil Tank LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.THE BASEMENT WATCHDOG THE BASEMENT WATCHDOG Model BW-WA360 110 dB Battery Operated Water Alarm Patented design allows it to detect water on any sideShelly Shelly Flood | Wireless Flood Sensor with Temperature Measurement | Home Automation | iOS Android App | Dripping & Leaki Shelly Flood is a smart water leak detector connected by wifi. It can also measure the floor temperature in your home. T10% Off Daytech DAYTECH Wireless Door Chime Doorbell, Waterproof Door Open Contact Sensor Alarm with 500Ft Range and 5 Adjustable Volume How This Door Open Alarm Works: Door sensors are devices that let you know when someone has opened a door. When door orUanTii UanTii Tuya WiFi Door Window Detector with Light Sound Alarm Wireless Door Alarm Sensor for Home Security Smart Home Doo 【No hub required】The window Door alarm sensor works with directly Tuya Smart/Smart Life App and Alexa Google Home, no huGeneric Solar Motion Sensor Alarm Alarm 120dB Loud Siren Strobe Lights Sound Security Alarm Adjustable Sensing Distance IP65 Mot ✅【Solar-Powered Alarm Light】: This solar-powered alarm strobe light is designed to deter intruders and thieves with itsGROZY WiFi Wireless Smart Water Leak Sensor with Dripping Detection Flood Detector, Tuya APP Remote Monitoring of Leaks, APP A Type: Water Level Alarm. APP: SmartLife/Tuya16% Off YESMOO WiFi Siren Alarm Sensor Smart Alarm Siren Home Security System Tuya Smart Life APP Compatible with Alexa Google Home Voi 💌[【APP Remote Control & Voice Control】No matter how far away from home, the warmth of home is in hands. Making your homPrice Xes Wireless Home Security Alarm System DIY Kit - Magnetic Sensor - Guardian Protector - Window Glass Vibration Security Bur ✔Magnetic sensor switch detects entry protecting your home or office whether you are in or out.eufy Security eufy Security Water Leak Detector and Freeze Sensor with Remote Alerts, IP65 Waterproof, 2-Year Battery Life, HomeBase R Instant Notifications*: Protect your home from leaks, water damage, and damage from freezing temperatures. Get notificatGeneric 2 Pack Wireless Home Alarm with 4 Remote Control 105db, PIR Motion Sensor Anti-Theft House Security, for Driveway Shed G WIDE RANGE OF USES - Motion detection is an essential part of any home security solution. The sensors in this system useLEAFLEX 2 Pcs Garage Door Bracket for Aqara T1 Alarm Entry Sensors, Quick Installation & More Protection for Your Garage Door, G Package includes: 2 Pcs Garage Door Bracket, Includes pastes and screws.Meichoon Meichoon Window Door Alarm Wireless for Home Security Sensor Anti Theft Burglar Doorbell Chime DIY Protection Ideal for 🔊Multi-funciton Security Alarm - It has the function of arm, disarm, emergency alarm and doorbell, widly meet your demaUanTii UanTii Tuya WiFi PIR Motion Sensor Movement Detector Alarm Smart Life APP Wireless Home Security System Compatible with 【APP Remote Control Tuya WiFi Motion Sensor】Simple download APP "Smart Life/Tuya Smart" in App Store or Google Play addeMACROS 1/2 Mile Long Range Solar Wireless Driveway Alarm Outdoor Weather Resistant Motion Sensor & Detector- Security Alert Sys NOTE: The receiver come complete with charging cables and adapters. For optimal performance, please ensure to use the prGeevon Geevon 10 Pack Water Leak Detectors, 100dB Water Sensor Alarms Flood Detector for Basements, Bathrooms, Laundry Rooms, K LOUD 100DB WATER LEAK DETECTORS FOR HOME- Each water sensor alarm leak detector features ultra-loud 100dB alarm audio whSPARTHE SPARTHE Gas Leak Detector Alarm for Caravan, Boats Gas Detector-Accurate detection and security protection.Fast response, high-pitched alarmCHUSHEN Smart Window Door Magnet,WiFi Door Alarm Window Sensor Detector Smart Home Security Tuya SmartLife App Control Compatibl 🥁 【Enjoy Your Smart Life】When you leave home, it will push notification message to you when the door/window opens or clzangang Natural Gas Leak Detector, Portable Gas Sniffer with Audible & Visual Alarm, for Combustible Gas Like Methane, Propane w 【What You'll Get 】: Gas Leak Detector X1, AAA Batteries X2, User Manual X1, Carrying Pouch X1.HEIMAN HEIMAN Wi-Fi Water Alarm, WLAN Water Detector with Battery, Smart Water Sensor, 75 dB WiFi 2.4 GHz for Kitchens, Basemen With 5 year lithium replaceable long-term battery.SCS Direct Water Leak Monitoring Sensor with Alarm 3 Pack - Leak Bug Electronic Water & Flood Leak Detector - Detects as Little as Water Alarm- Finds Leaks before damage occurs - sensitive to just 1/32 of waterCordoode Propane Alarm | 12V High Sensitivity Leak Detector - Alarm Monitor Sensor for Home, Kitchen, Trailer or RV, Leak Detecto Audible Alarm: Equipped with a sensitive sensor, our propane detector helps reduce worry about accidents, protecting youNESOVI NESOVI WiFi Water Sensors for Leaks: 110dB Water Detector with APP Real-time Notification | 5Pack Water Sensor Alarm Lea Friendly Feature: When a water leak is detected, the water sensor and gateway sound a 110dB alarm and flash blue lights,ENEGG Motion Sensor Doorbell, Entry Alert Door Chime for Business Store Home System Commercial Door Alarm Detector, Caregiver ⭐ 5 in 1 multi-mode: welcome/doorbell/alarm/color light/night light.HEALTHY CHOICE Healthy Choice 60-Liter Auto Sensor Trash Bin - Wave Your Hand for Auto Open/Close, Waterproof Lid, Optional Manual Oper Auto Sensor Operation: Simply wave your hand over the sensor to automatically open and close the lid, providing a touch-HTZSAFE Driveway Alarm- HTZSAFE 1/2Mile Solar Driveway Alarm System- Up to 70FT Wide Sensor Range- Fully Weatherproof Outdoor Mo SOLAR WIRELESS ALARMS- The outdoor weather resistant solar motion sensor is powered by built-in rechargeable battery, anJectse High Sensitivity Gas Monitor with 4 in 1 Measurement Rechargeable Battery, Sound Light Vibration Alarms, Backlit Display [Multiple Charging Options] This gas tester is rechargeable and can be charged using USB from a computer, car, power banEP ESSENTIAL PRO Wireless Digital Weather Station LCD by EssentialPRO With Indoor and Outdoor Temperature and Humidity Sensor | Digital T ALL IN ONE REAL TIME MONITORING: Provide real time live temperature, humidity data and calendar function, the EssentialPHEALTHY CHOICE Healthy Choice 70-Liter Auto Sensor Trash Bin - Wave Your Hand for Auto Open/Close, Waterproof Lid, Optional Manual Oper Auto Sensor Operation: Enjoy hands-free waste disposal by simply waving your hand over the sensor to automatically openKeenWise KeenWise Gas Leak Detector, Natural Gas Detector with Gooseneck, LCD Display, PPM or%LEL Gas Real-Time Gas Concentration Combustible Gas Leak Detector: The GD19 gas detector can quickly and accurately detect gas leaks in hard-to-reach areasActpe Motion Sensor Doorbell for Business Store Entry Alert Welcome Buzzer Monitor Alarm, Outdoor Door Chime Kit for Home - LE ✨【Easy, Fast, Wire Free Installation】 Infrared sensor detects motion and sends a signal to the receiver. Chose from 36 REmerald Planet RF Interconnect Photoelectric Smoke Alarm with 10 Year Lithium Battery | Emerald Planet Ranger 10-year 3V lithium batteryFUNFANG Tuya ZigBee Intelligent Vibration Drop Sensor Detector Real Time Motion Vibration Alarm Sensor Tuya APP Remotely Control 📍【Intelligent Linkage】: The vibration sensor can be used in conjunction with a variety of Tuya products to realize whol15% Off Daytech Daytech Door Sensor Chime Wireless Door Alarm Sensor When Opens, Entry Alert Buzzer Doorbell Chime for Business Home Sec 【PROTECT SAFETY OF YOUR FAMILY】 If you have elderly with dementia, the door sensor chime can protect your aged parents fEG Gas Leak Detector & Natural Gas Detector: Portable Gas Sniffer to Locate Leaks of Multiple Combustible Gases Like Propan MULTIPLE DETECTABLE GASES: Locates combustible & explosive gas leaks from methane / natural gas, propane, fuel, ethane,EPTTECH EPTTECH Smart TLC 2326-WF-S Tuya APP Efficient Solar Panel Rechargeable Battery Liquid Level Monitor Wifi Water Oil Tank LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.BSIDE BSIDE Natural Gas Detector Rechargeable Gas Leak Tester, Vibrate & Audible and Visual Alarm, Pocket Gas Leak Sources Loc [Rechargeable]: The pocket gas leak tester comes with a rechargeable battery & charging cable, you will never worry abouCINARIS Air Quality Monitor, Ammonia Test Meter 3.5 Inch LCD NH3 Concentration Tester Ammonia Detector Ammonia Alarm Device Detection range: NH3 ( 0-50ppm) -Power supply：rechargeable Li-battery 2000mah includding USB Chargeing cableTopHomer 3Pcs Smoke Detection Sensor, MQ-2 Liquefied Gas Butane Methane Sensor Module for Gas Leak Monitoring Device - MQ-2 Smoke Liquefied Gas Butane Hydrogen SensorGeneric PM2.5 Sensor Module - High Precision Dust Sensor Module - Portable Dust Sensor, PM2.5 Concentration Sensor for Household Precise Design: By utilizing our Dust Sensor Module, you can detect PM2.5 concentration in the air with high accuracy, mMETAK 5 Pack Water Leak Detectors for Home, 100dB Water Sensor Alarm for Basement, WD60 Flood Leakage Detection Devices for Pi Leaking & Dripping: 2 water sensitive probes on the front for monitoring pipe/drain drip and 4 rear probes for detectiongernie Gas Detector, Portable 4 Gas Monitor with Sound Light Vibration Alarm for H2S O2 CO LEL, 4 in 1 Rechargeable Accurate Me [Backlit Display] The gas monitor has a high resolution backlit screen that provides clear readings day and night, ensurGeneric Air Quality Sensor Module - High Precision Air Quality Detection Sensor,Portable Dust Sensor, PM2.5 Concentration Sensor Precise Design: By utilizing our Dust Sensor Module, you can detect PM2.5 concentration in the air with high accuracy, mGallagher Gallagher Wireless Water Monitoring System Series 2 - Monitoring System for Water Tanks, Corded Electric, Lithium-Ion Ba Power Source: Corded electric power source for reliable and continuous operation, no need to worry about battery replace10% Off intendvision Natural Gas Detector, Gas Leak Detector with a 11inch Probe to Situate Combustible Gas Leaks for Propane, Natural Gas, M Detects a Wide Range of Combustible Gases 1-50000PMM or 1%-100%LEL alarm range. Detects a large number of flammable gaseArikon Plus Portable 4 Gas Monitor, Sound Light Vibration Multi-Gas Tester Detector, Rechargeable LCD Screen Backlight -Ready to Use Wide Application Easy Carrying Around: This multi-gas monitor detector comes with a super nice padded case with compactKLEIN TOOLS Klein Tools Refrigerant Gas Leak Detector Refrigerant gas leak detection of CFCs, HFCs, HCFCsGAGALOR 5 Pcs Pack of Water Level Sensor Side Mounting PP Plastic Liquid Float Switch M16 Screw M16 Screw mounting with T silicone sealEPTTECH EPTTECH Smart TLC2326 Tuya Liquid Level Monitor APP Oil Water Indoor IP65 Alarm Sensor Household Indicator Ultrasonic We LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.Generic Pm2.5 Detector | Portable Small Humidity Meter Led Display Type-C Charging with Strap | Dust Detection Tool Multipurpose Real-time monitoring display: Effortlessly monitor PM2.5 steps, temperature, and humidity with a real-time, LED display,Krujecnt Krujecnt Indoor Air Quality Meters - LED Display Small with Strap Type-C Charging Air Quality Monitor Portable | Multipu Easy-to-Read Interface: Stay informed PM2.5, temperature, and humidity in real time with the digital LED display, includ