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CCTV cameras – different types and what they offer

CCTV Cameras Northern Ireland

CCTV Cameras have transformed from simple, usually low quality analogue to super high resolution, small form factor IP CCTV Cameras.

For many years, CCTV cameras came in one shape: large “shoe box” style metal boxes. In recent years advancements in CCTV technology have given customers so many more types to choose from, including more discrete CCTV Cameras.

 

CCTV Cameras - installation in Northern Ireland

As CCTV cameras continue to be deployed in homes, businesses and modern towns and cities across Northern Ireland, and CCTV systems become an ever-more integral part of an business security and operation requirements we have broken down in this article the most common types available to our customers for business and home use.

Businesses in particular have many usage cases for a CCTV Camera system as the benefits for businesses are many. At Advanced Overwatch, we offer GDPR compliant CCTV Cameras and security systems installation to our customers and can also assist with compliance. Find out more by clicking here.

 

Analogue CCTV Cameras versus IP CCTV cameras

While an IP camera (or network camera) now provides a modern alternative, analogue CCTV systems still remain widespread – even as manufacturers push their IP solutions as the most effective choice. Many of the cameras described in this article will be available as either analogue or IP options.

The major difference between the two is how footage is transferred between the cameras and recording system. IP cameras allow this footage to be transferred digitally over a network, with each camera having its own IP address in order to communicate back to the recorder (NVR – Network Video Recorder).

An analogue or analog camera, on the other hand, will need to send the CCTV footage back via a coaxial cable directly to a Digital Video Recorder (DVR), which will then convert the signals into digital footage. This conversion is undertaken at the camera-end, for IP cameras, meaning the digital signal can be sent via the network, often to a Network Video Recorder (NVR) – though other storage solutions such as server/cloud-based options are becoming increasingly popular with our customers.

As video quality and network internet speeds have increased, IP cameras are becoming a more popular choice which we install at customer premises. While analogue systems are often lower in price and require less bandwidth, they don’t work well in a wireless scenario and don’t offer the same kind of technical capabilities that IP based CCTV systems can provide. Video analytics, reduced cabling, improved image quality and zoom capabilities, and scalability are all benefits associated with an IP camera. Multi-sensor CCTV cameras are packed with technology. View video below.

 

IP cameras are also ideal for some customers who wish to to utilise a cloud-based surveillance storage option, where footage is sent directly to our servers. A cloud based solution offers the benefits of offsite storage, ease of access to authorised parties, and also includes VSaaS (Video Surveillance as a Service) alternatives to video storage on a local hard drive inside a CCTV DVR or NVR.

Advanced Overwatch are a Key Integration Partner with Dahua Technologies and as such are in a unique position to offer all of the CCTV Camera types offered in this article during our free CCTV Camera system design. Dahua Technology was founded in 2001 and are a world leader in the manufacturing and supply of CCTV Cameras and security equipment and have been a partner with Advanced Overwatch since 2018.

 

Box CCTV cameras

CCTV cameras - box style cameraThe simplest form of camera type remains a simple box camera, to which a lens of the user’s choice is attached at the front and cables to the rear – however, this type of camera is rarely sold anymore and usually is an indication of an old analogue based system. Some ‘box’ models have a built-in lens, maybe even a zoom lens, but these are not common.

If the camera and lens is expected to suffer damage from dirt, rain, frost, heat or tampering, we recommend a protective enclosure called a ‘housing’ . Basic dust-proof options are simple rectangular or cylindrical boxes with a window for the camera’s view, cable outlets for power and video, and a fixing bracket. These are likely listed as ‘IP54’, meaning the Ingress Protection is officially dust protected and protected against splashing water, but not rain-proof, so often fine inside buildings.

For external use, IP65 is recommended (dust-tight and protected against water jets) as a minimum and add a sunshade to keep glare off the housing’s window. In hot and cold environments ventilating fans/blowers can be specified to reduce camera temperatures and thermostatically-controlled electrical heaters to prevent window misting.

A ‘windscreen’ wiper can be advisable in dirty environments, as can a squirting washer if extreme. Such ‘shoebox’ housings offer the flexibility for camera and lens to be changed easily as future needs require, and are easily carried by motorised pan/tilt units described below.

Fully-integrated assemblies, with camera, lens and housing inextricably combined at manufacture are now commonplace, trading lack of flexibility for rapid installation. LED lighting is often built-in too. Currently we will service these cameras for customers, however no longer install them as they are not technology rich or value for money.

 

Bullet CCTV cameras

cctv cameras bullet camera dahua northern ireland advanced overwatchBullet cameras are named so because of their cylindrical form. Such is the miniaturisation of these technologies that their use is widespread in video intercoms, covert disguises (e.g. clock faces, smoke detectors), head-mounted on traffic wardens, police, and more.

Generally a bullet camera is utilised outside, as it often comes installed within protective casings and head covers that prevent damage from dirt and protect from the lens face being interfered with.

Bullet CCTV cameras are also considered easy for installation purposes, often simply being screwed on to a mounting bracket and provide a high degree of visual deterrent to intruders.

Bullet CCTV Cameras are a popular choice with our customers for high footfall areas – businesses premises and locations where the general public are frequently located.

 

Dome CCTV camera

Domes have become the housing chosen most often for compact camera assemblies, largely because CCTV users consider them more visually appealing than the old ‘white shoebox’ of yesteryear.

Featuring a circular, dome encasing, dome security cameras are used in a variety of settings, with the majority featuring vandal resistant casings as part of crime prevention tactics.

The majority can be quickly surface-mounted on walls/ceilings, recessed into ceiling tiles for a lower profile, or hung as a ‘pendant’ from external corner brackets or masts on a ‘swan neck’. Domes containing a static camera usually have a varifocal lens so that installers can tweak the precise field-of-view.

Some IP (Internet Protocol) CCTV domes go so far as to fit these static cameras with ‘actuated’ innards that can drive the orientation, focusing and focal length by remote control after physical installation, but stop short of being regular pan/tilt domes (see below).

Units with integral LEDs should be deployed with caution – while providing some benefits, they reportedly can cause glare for the camera and attract wildlife.

For many years domes could not spin supplementary lighting, so a swathe of static lamps was necessary at night. Some domes now include powerful LED lamps, either infrared or visible light that spin with the camera. ‘Ball’ PTZ cameras now combine lightweight dome innards in very robust metal ball-shaped cases carried by fast externally integrated pan/tilt motors. Attaching lights to these is so much easier, too.

A dome security camera can cross paths with a variety of other CCTV options, including but not limited to:

  • PTZ dome CCTV cameras
  • PoE (Power-over-Ethernet) dome CCTV cameras
  • HD/4K 8MP dome CCTV cameras
  • Standard dome CCTV cameras

PTZ CCTV Camera

CCTV Cameras - PTZ Northern Ireland

PTZ stands for pan, tilt, zoom. These cameras are popular for their flexibility, providing a lightweight option that can cover a wide area range. They offer operators the ability to manually control their cameras, or programme them to ensure they receive the most accurate view possible, so are often popular in cases with wide area surveillance applications such as cities, transport hubs, sports stadiums, retail centres and warehouses.

Where lightweight equipment will suffice, a PTZ camera is generally considered a popular solution. Indeed, so light are the innards that some claim to spin as fast as 360°/sec. Darkened domes can make the camera’s direction of view difficult to be ascertained by those surveilled, albeit also diminishing its low-light performance.

The camera/zoom lens combinations share much with low-voltage camcorder assemblies, which is why 35:1 zoom is commonplace along with auto-focus. Small and powerful onboard computing power adds telemetry control plus options such as the aforementioned preset-memory function, privacy zones that automatically move to keep user-programmed areas obscured from the video, auxiliary alarm inputs/outputs, wireless communications, and video content analysis including automatic target following. Many modern devices feature auto-tracking to capture and record moving objects/people, even if operators are away from their posts at the time. PTZ cameras also provide a useful deterrant, as they can give off the impression that intruders/offenders are being watched when automatically panning an area.

 

360 degree CCTV cameras

cctv cameras 360 degree360⁰ cameras provide an efficient way of monitoring a large area and can help reduce any potential blind spots. Most offer panoramic modes, and may feature digital PTZs which allow operators to electronically pan, tilt and zoom on specific locations, while the camera continues to monitor the whole 360-degree area.

Generally these cameras are relatively low maintenance options, as they don’t involve many moving parts, while those that don’t have on-board de-warping functionality can be complemented with video management software that can do such a job.

Also known as ‘Panoramic’ CCTV Cameras – this Multi-Sensor plus PTZ camera combines eight (8) 2MP sensors working in tandem and a high-speed PTZ camera to create a comprehensive 360° view.

With its all-in-one design, the camera provides a 360° panorama and provides region of interest details at the same time. Dahua panoramic cameras provide 180°, 270°, and 360° view options that provide wide-area video surveillance for increased situational awareness. Fisheye and Multi-sensor cameras replace multiple single-sensor cameras providing easier installation and a higher return on investment.

 

HD, 4K 8MP & 8K 12MP CCTV cameras

The name pretty much speaks for itself, here. HD Cameras have become more widespread and affordable in recent years, as vendors have been able to integrate high definition capture technology into their surveillance solutions.

CCTV Cameras 4k 8k types fisheye dahua northern ireland advanced overwatchGenerally, these cameras require higher bandwidth to transfer recorded across to the recording system in operation, but offer high quality video quality that make them compelling for on-premises live monitoring.

In more recent years, 4K and even 8K options are now beginning to come to market, providing operators with ‘super high resolution’ alternatives. These are said to be particularly ideal to high-level security environments, such as transport hubs, stadiums and other open environments at risk of terrorist activity. These options are best suited for situations which demand recording video for evidence purposes, especially in cases where high quality zoom without pixelating the image is required, though such devices do tend to be on the more expensive side of the market.

The number of camera options we’re subjected to nowadays might seem bewildering and advancing technology will surely make it grow.

And, with the widespread availability of video analytics and deep-learning software that can now be integrated into a surveillance system, the choices are certainly broad. Analytics software now has the ability to provide operators with the benefits of motion detection, thermal measurements, social distancing and face mask detection, facial recognition capabilities, and much more. Network and CCTV surveillance technology continues to evolve at some pace.

Nonetheless, with an outline of the possibilities and a conversation with our sales team, we can help narrow down your surveillance camera system choice quickly and efficiently to upgrade your existing CCTV camera security system or install a brand new, state of the art CCTV camera system.


Advanced Overwatch provide SSAIB Certified installation of CCTV Cameras to our customers in Northern Ireland, province-wide.

Telephone: 028 7087 8077 or visit our contact page to arrange a free on-site survey and quotation.

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