Ammonia Detector Air Quality Monitor Rechargeable NH3 Detector with Range 0-100ppm & 0.1ppm Resolution, Temp(℉/℃), Humidity, LCD Display, Alarm Mode for Industry, Home, Farm, Poultry

eufy Security Water and Freeze Sensor with Remote Alerts, IP65 Waterproof, 2-Year Battery Life, HomeBase Required, Compatible with HomeBase 2 and 3, Optional 24/7 Protection Service, App Control

$34.99

Govee WiFi Water Sensor 3 Packs, Smart Water Leak Detector, 100dB Adjustable Alarm Suit for Home and Basement, Leak Alert with Email & APP Push (Only Support 2.4G Wi-Fi)

$45.99

Govee Water Detectors 8 Pack Sensor with 100dB Adjustable Audio Alarm Bundle with Govee WiFi Smart Gateway with Alert Email & APP Push for Home Bedrooms

$79.99

Airthings Corentium Home Radon Detector 223 Portable, Lightweight, Easy-to-Use, (3) AAA Battery Operated, USA Version, pCi/L

-15% $111.00

Made Here Co. Leak Detector Blue - Fast-Acting Leak Detection for High & Low-Temperature Applications in Gas & CO2 Systems (32 oz)

$17.99

TopTes PT199 Natural Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Sources Like Methane, Propane for Home(Includes Battery x2)-Orange

$22.99

SECRUI Door Chime, Wireless Door Chimes When Door Open Entry for Business/Home/Office/Store (500ft Range 32 Chimes Adjustable Volume) Door Ringer Alert Buzzer Alarm with - 1 sensors

$20.99

SECRUI Door Chime, Wireless Door Chimes When Door Open Entry for Business/Home/Office/Store Door Ringer Alert Buzzer Alarm Door Ringer for Opening – Door Open Alert - 2 sensors

$27.99

Natural Gas Detector, TopTes PT205 Gas Leak Detector with Audible & Visual Alarm, Propane Leak Detector with%LEL Value of Methane, Butane, and Combustible Gas for Home, RV (Includes Batteryx2)-Orange

$27.99

Natural Gas Detector, TopTes PT177 Gas Leak Detector with Audible & Visual Alarm, Portable Gas Sniffer to Locate Combustible Gas Leak Sources Like Methane,Propane for Home (Includes Battery x2)-Orange

$17.99

TopTes PT520A Natural Gas Detector, Gas Leak Detector with 17-Inch Gooseneck, Locating The Source of Propane, Natural Gas, and Combustible Gas Leak for Home and RV (Includes Battery x3) - Orange

$39.99

TopTes PT520B+Rechargeable Natural Gas Detector, Gas Leak Detector with a 17-inch Probe to Situate Gas Leaks for Propane, Natural Gas, Methane, LPG in RV or Home, Measuring PPM or%LEL - Orange

$79.99

TopTes PT210S Gas Leak Detector, Natural Gas Detector with 4-inch Probe, Propane Leak Detector Locating Combustible Gases Like Natural Gas, Methane for Home, Measures%LEL (Incl. Batteries) - Orange

$29.99

Radon Test Kit for Home - Easy to Use Charcoal Radon Gas Detector for Peace of Mind | 48-96h Short Term EPA Approved Radon Tester | Includes Lab Fees | Protect Yourself and Your Family | 2-Pack

-47% $26.09

Colorwell Natural Gas Detector Plug-in Propane Gas Detector for Home & RV Gas Leak Detector for LNG, LPG, Methane - 2 PCS

-10% $35.09

Radon Test Kit for Home - Easy to Use Charcoal Radon Gas Detector for Peace of Mind | 48-96h Short Term EPA Approved Radon Tester | Includes Lab Fees | Protect Yourself and Your Family | 1-Pack

-46% $16.19

Airthings Corentium Home Radon Detector 2350 Portable, Lightweight, Easy-to-Use, (3) AAA Battery Operated, USA Version, pCi/L

-23% $78.99

Colorwell Natural Gas Detector Plug-in Propane Gas Detector for Home & RV Gas Leak Detector for LNG, LPG, Methane.

-10% $19.79

3 Packs Natural Gas Detector - Gas Leak Detector for Home,RV, Gas Detectors for Home Natural Gas,Combustible Gas Detector for LNG, LPG,Propane,Methane.

$55.99

Natural Gas Leak Detector, Portable Gas Sniffer with Audible & Visual Alarm, for Combustible Gas Like Methane, Propane with 2 Batteries & Carrying Pouch

-9% $9.99

HSTMYFS Natural Gas Leak Detector, Plug-in Propane Natural Gas Detector for Home Kitchen RV, Combustible & Explosive Gas Alarm for LPG, LNG, Methane

$22.99

Gas Leak Detector for Home - Plug in Gas Detector for Home Natural Gas,Combustible Gas Detector for LNG, LPG, Propane, Methane.

$22.99

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

$117.95

PRO-LAB Radon Test Kit for Home - EPA Approved Short-Term Radon Tester with 2 Detectors - 20 Lab Fee Required Per Detector - Quick & Reliable Radon Testing

-10% $7.95