With a security system, one of the things a homeowner wants to have are motion sensors. The majority of these sensors have a photocell, which is what’s used to detect the movement. They’re much like the photocells that are used on lights that come on at dusk and go off at dawn. They react to changing light levels. But when it comes to a motion sensor, those changing levels of light equal motion — and that’s how the detector knows that someone or something is in the area. Fortunately, there are other options to consider when a homeowner wants to use a motion sensor.

Other choices for these sensors include infrared, which detects motion when the beam is broken between sensors. That indicates that someone walked across the path — but it doesn’t work as well because it can be more easily avoided. Motion sensors that have photocells are easier to work with and more reliable, since they detect motion in a much wider area and focus on people and animals that may move through that location.


Choosing the Right Motion Sensor

Selecting a motion sensor is important, and it should be based on a number of different things that a homeowner really needs in order to be successful with having a good security system. When choosing a motion sensor, consider:

  • where the sensor will be placed
  • the cost of the sensor that’s being chosen
  • compatibility issues with other devices
  • whether flickering or changing light may trigger false alarms
  • if there is any kind of regular maintenance needed for the sensor

By looking at all of that and carefully considering the options, a homeowner can choose a motion sensor that’s going to work better for their needs. It may be one through a particular company, or it may be one that’s separate as they build their own system. Either way, it needs to work well and be reliable, so the homeowner can feel good about their level of security.

What Does a Photocell Do?

A good system for home security can really use photocells to its advantage. That’s because these systems understand that photocells are generally the gold standard, and are commonly chosen to make a system work successfully.

Photocells are designed to “see” things around them, and then send a signal to a device as to what that device should do about the thing the photocell “saw.” In most cases, this is what happens when a security light either detects motion or notes a change in the level of light.

That causes the security light to come on or go off, depending on what was detected. But it’s not always necessary to have a photocell to get a good motion sensor, and exploring other options can be a good idea when changing light patterns could cause too many false alarms.


A Good Security Company Can Help Homeowners

When it comes time to choose a motion sensor — with or without a photocell — it’s important to make sure the equipment is coming from the right company. Not only does that reduce the risk of there being a problem, but it also lowers the chances of a homeowner not having adequate security for their needs. The level of peace of mind is much higher when there are good motion sensors, because it helps the homeowner see that they’re not going to have a high level of risk. They’ll be protected, and they can sleep well at night knowing that the motion sensors and their security system are keeping them safe.

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