Refurbished Household Sensors & Alarms — 16 Deals

16 live US listings.

Robinair LD9-TG Tracer Gas Leak Detector with Full Color Liquid Crystal Display (LCD) and Sweep Mode Function - Uses UV Wavelength Technology and Tracer Gas to Locate System Leaks

$283⁸²

SJE-Rhombus Tank Alert XT - Indoor/Outdoor Tank Alarm with Auto Reset

$104⁵¹

Air Quality Monitor, Formaldehyde Detector, Temperature & Humidity Meter, Pollution Tester, Sensor; Detect PM2.5/PM10/PM1.0 Micron Dust, Test Indoor TVOC Volatile Organic Compound Gas; eBook

$60³⁷

Watts A2C-SC Series Intelliflow 1/2" Washing Machine Smart Water Shutoff Valve with Leak Sensor, Inlet Adapters, Without Wall Box, Automated Flood Detection with Real-Time Text and E-Mail Alerts

$298¹⁸

Moen White Flo Smart Water Leak Detector, Water Sensor Alarm for Home, 3-Pack, 920-005

$106⁴¹

Safe T Alert 30 Series Classic LP Gas Alarm - Propane Alarm - Surface Mount, Black - 30-441-P-BL

$26⁴⁶

Klein Tools ET120 Gas Leak Detector, Combustible Gas Leak Tester with 18-Inch Gooseneck Has Range 50-10,000 ppm, Includes Pouch, Batteries

$102¹³

MySpool Water Level Alert with Text Message and Email Notifications, Battery Powered with a Float Sensor

$42⁴⁵

YoLink DIY Automatic Water Leak Detection & Shut-Off Starter Kit, EVO Valve Operator, Wireless Valve Controller, (3) Leak Sensors, Hub

$214²⁹

Eve Water Guard - Smart Home Water Leak Detector, 6.5 ft Sensing Cable, 100 dB Siren, (Apple HomeKit), App Notifications, Bluetooth, Thread

$76⁷⁹

Honeywell Home RWD42/A Water Defense Water Leak Alarm with Sensing Cable, Rwd42 , White

$20⁰²

Moen Flo Smart Water Leak Detector, Drip or Flood Sensor Alarm for Home, 1-Pack, White, 920-004

$37⁵³

Feit Electric Smart Wi-Fi Water Leak Sensor with Audible Alarm, Wireless, Indoor/Outdoor, 24/7 Home Security System with Mobile App Notification, Battery Operated, No Hub Required, H2O/WiFi

$18⁸⁸

iSpring LS43 Water Leak Detector Alarm System, Automatic Shut-Off Valve and 2 Detection Sensors, Connects Up to 8 Sensor to Prevent Flooding, 3/4" NPT

$103⁸⁶

Safe T Alert - Dual LP/CO Alarm - Flush Mount Black - 35-742-BL

$55¹³

YoLink Water Leak Starter Kit: Hub + 4 Leak Sensor 1 (Silent), LoRa Long-Range, App/SMS/Email Alerts, D2D Offline Triggers, 2 AAA Up to 5-Year Battery, Compatible with Alexa/IFTTT/Home Assistant

$52²³