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Posts Tagged ‘business security’

PIR Sensor Alarm – the Technology Behind it

Tuesday, September 29th, 2009

PIR sensor alarmA PIR sensor can pick up infrared radiation from surrounding objects. Once temperatures change due to a moving intruder, the alarm connected to such a sensor can go off.

Safety is a big issue nowadays, whether you are talking about home or business. One way to ensure this is to install alarms, and one kind of alarm is the PIR Sensor Alarm, which is based on the technology of the Passive InfraRed sensor. The infrared sensor is an electronic gadget that measures the degree of infrared light radiated by objects that pass through or that are picked up by the sensor. Such sensors are used to build motion detectors, which are attached to alarms.

A PIR sensor can sense movement through changes in temperature. For instance, if a human passes in front of a source of infrared radiation that is of a different temperature, say a wall, safe, or display case then the sensor will detect the change in temperature and set off an alarm. This is because all objects emit black body radiation; IR radiation may be invisible to human eyes, but electronic devices such as the PIR sensor can spotthis radiation. While some infrared sensors will emit infrared light beams, a passive infrared sensor will simply accept and detect incoming radiation.

You can think of the PIR sensor as an infrared camera that remembers how much infrared energy is on its surface. When power is applied to the sensor, the electronics will control a set of circuits that are connected to and can activate the control panel of a security alarm. When a person enters the PIR sensor’s monitored area, the sensor picks up the infrared energy that the person’s body emits. This infrared energy is then focused by a segment of mirror or a Fresnel lens. This detected energy overlaps a certain part of the sensor chip that was measuring a cooler part of an area that the PIR is protecting. As the person moves, the hot spot on the sensor chip also moves, which can activate the alarm through input that is interpreted as detection.

In other words, differences in temperature can call the alarm up. The PIR sensor can be overrun with an intruder holding a thermal shield that would make him or her have the same radiation and temperature as the surrounding area. This is very difficult to achieve, however, so a PIR sensor can be useful in protecting houses, businesses, and other establishments that need security from intruders. For more information on the best PIR sensor for your home or business, talk to your local security retailer.

No More Pilfering with Surveillance Cameras

Saturday, March 7th, 2009

You’re losing significant amounts of money but profit reports of your business say otherwise. You can’t pinpoint, however, when or where things went wrong. Or at least you can’t until you make use of surveillance cameras for your business.

Cash Theft Proven by Surveillance Camera Videos
Loss Prevention Results, Inc., a company based in Wake Forest, North Carolina, recently announced the success of one of their investigations. Mark Manney of LPR had been called in by a Northeast vending company to determine the reason behind the mysterious losses it was suffering from.

With the help of a covert VendingCam motion-activated surveillance camera, LPR had been able to obtain eight different footages showing one of the company’s route driver stealing low amounts of cash from certain vending machines with the use of keys the company hadn’t been aware he had been in possession of.

Upon the conclusion of the investigation, LPR had been able to obtain a audio-taped confession from the convicted employee, witnessed by a management representative, as well as a comprehensive written statement of the crimes committed.

How to Make Good Use of Surveillance Cameras
Safety for your business, in all aspects, can’t be completely guaranteed just by purchasing any surveillance camera. Among other things, you’ll have to purchase the model most suitable for your needs as well as determine the ideal location for it.

Choose the right surveillance camera
Consider the light levels of the setting. Night vision or infrared is required for video footage taken in the dark.  Besides size and budget, take other important features like motion-activated controls, backup power, and recording capabilities into account.

Choose the right location
If you wish to take covert video footage, it’s best to use tiny surveillance cameras that can be easily concealed behind potted plants or other objects that people normally won’t give a second glance. But if you’re after expansive or complete coverage of the entire room, it’s best to mount your surveillance camera at any top corner of the room, preferably facing entrance and exit doors.

dome dummy camera image

Buying a Surveillance Camera

Tuesday, September 16th, 2008

professional dummy cameraSurveillance cameras are one of the most effective tools for safety and security today and you can use it both at home and the workplace. With a surveillance camera, you’ll have an extra pair of eyes that allows you to see things even when you’re not physically present.

Types of Surveillance Cameras
The first thing you have to decide on is the type of surveillance camera you’d need. You’re probably familiar with regular surveillance cameras. They look just like an ordinary camera does and you usually them mounted on the wall or from the ceiling. But these aren’t the only type of surveillance camera available.

Dummy Surveillance Cameras
These only look like but don’t work as actual surveillance cameras. People mainly purchase these devices as a deterrent. If placed in a conspicuous area, its presence can help prevent vandalism, theft, and other criminal activities. It can also act as a decoy. Criminals who are lulled into thinking they’ve destroyed the surveillance cameras in the area might not realize that actual surveillance cameras are still at work.

Covert Surveillance Cameras
These are the exact opposite of dummy surveillance cameras. Firstly, their appearance belies their purpose. They do not have the conventional appearance of a surveillance camera and may look like any ordinary object found in your place. They can just as easily be a potted plant, a stuffed animal, or an alarm clock. Regardless of their appearance, all of them do work like surveillance cameras do.

These cameras may be more expensive than dummy surveillance cameras but they are reasonably priced. They are best used when you are hoping to apprehend an individual in the act of performing a certain activity. They are also best placed in areas where they draw the least notice but at the same time able to capture the entire area in view.

Wireless versus Wired
Surveillance cameras may or may not come with wires. A wireless surveillance camera offers greater flexibility as you need not worry about looking for a nearby source of power before installing it. They’re also ideal if you wish for a mobile system you can install and uninstall in ease. Wireless systems, however, cost more than wired systems.

Night Vision Security Cameras
Another thing you should consider is the light levels in the area you wish to secure. A surveillance camera capable of night vision viewing is necessary if the area under surveillance isn’t sufficiently lit.

Don’t make light of your decision. Even if it seems like a simple decision of buying the right type of surveillance camera, remember that your choice can make all the difference in saving your life later on.

professional dummy camera image


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