Cameras or Door & Window Sensors? What Indy-Area Homes Need (2026)

Short answer: For most homes, cameras alone are not enough. A camera records and sends you a clip, but it does not sound a siren or start a monitoring call when a door is forced. Door and window sensors (plus motion or glass-break detection) trigger the alarm the moment someone opens an entry. Cameras then show what is happening. The strongest setup uses both.

The short answer

Cameras and sensors do different jobs. Sensors detect a break-in. Cameras show you what happened. If you only have cameras, you're the alarm system. You have to see the notification, open the clip, decide it's real and call for help yourself. If you're asleep, at work or on a plane, that may not happen. If you're comparing equipment, our main site lists what each Nuvii package includes, and our new home security checklist walks you through checking every door and window.

What each device actually does

Door and window contact sensors trip the moment an armed door or window opens, before anyone is inside. That's what starts the siren and the signal to a professional monitoring center.
Motion sensors catch someone moving through the house, including someone who came in a way you didn't put a sensor on.
Glass-break sensors listen for breaking glass. They make sense for patio doors and fixed windows that a contact sensor can't cover.
Cameras and video doorbells record people, cars and packages, and send clips to your phone. They're great for evidence, deliveries and checking in on the house. Most do not trigger a monitored alarm on their own.

Why it matters in Indianapolis: the verification rule

Under Indianapolis-Marion County Code Sec. 811-215, a monitoring company has to try to reach you (or the person in control of the property) to verify an alarm before it notifies IMPD. A monitored sensor system starts that process automatically, within moments of the trip. A camera clip sitting in your phone's notifications starts nothing until you see it. Your contact list matters too: keep two or three people on it who will actually answer. We explain the fine side of this in Do I need an alarm permit in Indianapolis?

Where cameras earn their place

Front door: a video doorbell for faces, visitors and package deliveries.
Driveway and garage: vehicles and anyone walking up to the house.
Back and side doors: the entries you can't see from the street.
After an incident: clips you can hand to police or your insurance company.

In Indianapolis, you can also register your home cameras with b-link, a free program run by the Indy Public Safety Foundation and IMPD. IMPD doesn't watch your cameras. If something happens nearby, they know to ask you for footage. In Hamilton or Hancock County towns, ask your local police department whether it has a similar program.

A simple plan for a typical Indy-area home

Every exterior door gets a contact sensor, including the door from the garage into the house.
Ground-floor and basement windows that open get contacts. Use glass-break sensors for patio doors and big fixed windows.
Add one or two motion sensors on the main path through the house (use pet-friendly placement if you have a dog or cat).
Then add cameras: a video doorbell first, then the driveway and any hidden back or side entry.
Put it all in one app so an alarm and the matching camera clip show up together.

Questions to ask any installer

Which entries will have sensors, and which are covered by motion or glass-break detection instead?
What triggers a call from the monitoring center: sensors only, or cameras too?
How does each camera look at night, with your porch and street lights on?
Where are recordings stored, how long are they kept, and who can see them?
What still works during a power outage or an internet outage? (For phone lines and alarm communicators, see our landline alarm guide.)

How Nuvii designs it

Nuvii Smart Home is a local ADT Authorized Dealer (Indiana alarm license LAC-000541). At a free in-home assessment, we walk every entry with you, show you where a sensor makes more sense than a camera and where a camera adds real value, and put the alarm and cameras in one ADT+ app. Our own technicians do the installation. Call (317) 527-4469, or learn more about security system installation and security camera installation.

Frequently asked questions

Are security cameras enough to protect my home?

For most homes, no. Cameras record and send clips, but they usually don't sound a siren or start a professional monitoring call. Door and window sensors trigger the alarm when an entry opens, and cameras show what happened.

Do I need a sensor on every window?

Put contacts on every exterior door and on ground-floor or basement windows that open. Upper-floor windows that can't be reached usually don't need them. Glass-break or motion sensors can cover fixed glass and large window groups.

Will a camera call the police for me?

Usually not. In Indianapolis, a monitoring company has to try to verify an alarm with you before it notifies IMPD (Code Sec. 811-215). That process starts when a monitored sensor trips, not when a camera records a clip.

Can IMPD see my home cameras?

Not unless you share footage. The free b-link program lets Indianapolis residents register where their cameras are, so IMPD can ask for footage after a nearby incident. IMPD does not monitor registered cameras.

Can cameras and sensors work in the same app?

Yes. When they're installed as one ADT-monitored system, alarms, sensors and camera clips show up together in the ADT+ app.

Sources

This page is general guidance from an installer, not legal advice. Local rules quoted were checked on the date shown.

Are security cameras enough, or do I need door and window sensors?