CCTV Camera Systems
CCTV camera systems are essential to modern businesses as a tool to fight and prevent crime from occurring on your premises. Home security systems, too, are becoming increasingly popular as a method of counteracting or reducing residential crime.
A business without an up-to-date CCTV system is at risk, not only of burglary and vandalism, but also from more business-related crimes like data or personal information theft.
CCTV cameras and intruder alarm systems will deter most potential criminals from attempting any criminal activity in your workplace, but they will also help you to catch the culprits in the unlikely event that they do attempt a break-in.
To find out more about what kind of CCTV system and camera options are available, simply continue reading this page. If you are ready to get quotes from top UK suppliers however, you just need to complete the form at the top of this page.
CCTV Camera Features
Most security cameras use Charge Coupled Device (CCD) technology. This converts images that come through the camera lens into electronic impulses. CCDs provide good quality picture at a low cost. CCTV camera formats are measured in inches. Most cameras fall between 1/4” and 1”, with 1/4” or 1/3” cameras being the most common in CCTV sales. It may be beneficial to buy a larger format if the camera is being used in a dimly lit environment, so that it can gather more light.
Most companies choose a color security camera, rather than black and white. For security and evidence purposes, they provide a more detailed picture. Black and white cameras can operate better in low light environments, but most high quality color cameras can switch between color and black and white.
The detail, or resolution, of a picture is shown by the measurement in horizontal TV lines (TVL). 350 to 400 TVL produces a normal picture, with high resolution pictures increasing to 480 or 500. You need to ensure that your whole system (recording system and monitor) can support this resolution though.
Signal to noise ratio (s/n) signifies how much signal or picture the camera transmits as opposed to noise which is shown as static. A s/n ratio of 40db results in an acceptable picture. 30db produces a poor picture and 60db produces an excellent picture with no static.
Lux measures sensitivity to light. As a general rule, 21 lux cameras can see well in the light of a 40W fluorescent bulb, and 0.5 lux cameras can identify images in dim light. The lux you will need will depend on the lighting where the camera is to be positioned.
- Most cameras use CCD technology.
- Most companies select colour cameras for clarity.
- Picture detail or resolution is shown in horizontal TV lines.
- Signal to noise ratio shows much signal or picture the camera transmits compared to noise.
- Lux measure sensitivity to light.
CCTV Camera Options
CCTV cameras can be used for anti-theft, access control and internal staff surveillance. They can range from a basic security camera and monitor to a highly sophisticated digital CCTV system that offers non-stop recording and can be remotely accessed online from anywhere in the world. They can also be accompanied by a burglar alarm. Monitored alarms are usually connected to a motion sensor.
The sensor system is activated using a keypad when the building is vacated, so any unwanted visitors outside business hours trigger the alarm. Employees who know the security code can disarm the system if they need to enter the building.
In the case of a home security system and businesses in populated areas, the alarm can activate a siren to alert neighbors and passers by and send a message directly to the security services. Businesses with more isolated premises may prefer to use a silent alarm so as not to scare off the intruders while the police are alerted.
Obviously the complexity of the CCTV camera system will determine whether you need professional installation. Basic home security systems can be installed relatively easily, but if the CCTV system is for your business it is probably wise to leave it to the experts.
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