Alarm Sensors

Adding the right alarm sensors is the easiest way to extend a home security system to every door, window and hallway. This collection is for homeowners who already have a hub and want better coverage, renters adding wireless protection, and anyone who wants alerts on their phone when something changes at home. Small, discreet sensors stick in place in minutes and work quietly in the background, day and night, whether you are at work or away on vacation.

The range includes door and window contact sensors, motion detectors with pet-friendly settings, glass break sensors, and water leak sensors for laundry rooms and under sinks. You will also find keypads, key fobs, range extenders and indoor sirens. Most run on standard batteries and connect wirelessly to a compatible base station, so no wiring is needed. If you are starting from scratch, browse our Burglar Alarm Kits for complete bundles.

Home Supplies Hub lists the system each sensor works with, its power source and its range, so compatibility questions are answered before you buy. We keep the selection focused on useful add-ons, offer secure checkout and an easy returns policy, and have a friendly US-based support team if you need help matching parts.

Walk through your home, count the entry points that need coverage, and shop our Alarm Sensors to complete your setup. Every extra sensor closes a gap.

FAQs

Will these alarm sensors work with my existing system?

Sensors are usually brand-specific, so check that the product page lists your hub or base station. Mixing brands rarely works without a compatible bridge.

Do wireless alarm sensors need batteries?

Yes, most wireless sensors use coin cell or AA batteries that last one to several years. Your app or keypad will typically warn you when a battery is low.

Can I use motion sensors if I have a dog or cat?

Many motion detectors offer pet-immune settings for animals up to a stated weight, often around 40 to 80 lbs. Mount them at the recommended height for best results.