Guide · 8 min read
Types of CCTV cameras: a guide to choosing the right camera for each place
Home, outdoor, wireless, small and solar-powered security cameras, plus recorders and monitors: how they differ, which suits a house, a shop or a facility, and what to decide before buying and installing.
Types of security cameras by form and function
Surveillance cameras are classified first by their form and mounting, then by their function. Each type has a right place, and most surveillance failures come from the wrong type in the wrong place rather than from a weak camera.
| Type | Form and use | Where it fits |
|---|---|---|
| Bullet camera | Fixed lens with an obvious direction and a long infrared range | Fences, outdoor entrances, car parks and long corridors |
| Dome camera | Half-sphere housing that hides its direction and resists tampering | Shops, offices, hotels and indoor corridors |
| Turret camera | Like a dome without the glass cover, so no infrared reflection at night | Homes, covered entrances and warehouses |
| PTZ camera | Pans, tilts and zooms optically; follows targets manually or automatically | Large yards, industrial sites and staffed control rooms |
| Fisheye (360°) camera | One lens covers the whole room; the image is de-warped in software | Halls, showrooms, restaurants and open offices |
| Thermal camera | Sees heat rather than light, so it detects movement in total darkness, dust and fog | The perimeter of sensitive sites and factories |
| ANPR camera | Lens and illumination tuned to read number plates day and night | Gates, car parks and residential compounds |
Outdoor security cameras
An outdoor camera lives in Riyadh's sun and dust, so the first specification is not resolution but protection: IP66 or IP67 against dust and water, operation up to 60 °C, and a metal housing rather than plastic where the sun hits it directly. Night vision comes next: infrared covers 30 to 50 m on bullet cameras; colour at night needs white-light illumination or a large sensor with street lighting.
A 4K outdoor camera gives excellent daytime detail but is less sensitive at night, so for fences and car parks we usually prefer 4 or 5 megapixel cameras with the right lens over a 4K camera with a wide lens. "Zoom" should mean optical zoom, which keeps detail, not digital zoom, which only enlarges pixels.
Home and indoor cameras
A home security camera needs three things: a clear view of the main entrance and yard, smart alerts that tell a person from a cat or a car, and storage that keeps working when the internet drops. For houses and villas we usually install turret cameras at doors and covered entrances, bullet cameras on the fence and parking, and an NVR inside the house keeping 30 days, with a phone app for viewing from anywhere.
Indoor cameras in shops and offices are mostly domes because they are discreet and hide their direction. They go at tills, entrances and stock rooms, within what the regulations allow for the privacy of staff and customers.
Wireless and cable-free cameras
"Wireless" needs clarifying. Most wireless cameras send video over Wi-Fi but still need a power cable; they are only free of the data cable. A battery camera recharged every few weeks suits one remote point, not a whole system, because it records on motion only to save power. A camera with a SIM card works over the mobile network where there is no internet or fixed power, such as farms, rest houses and construction sites, usually paired with a solar panel.
For homes and shops, if a network cable can be run it is always the better choice: one PoE cable carries power and video together and is immune to weak Wi-Fi and neighbours' interference. We go wireless where cabling is impossible, with a router and network designed for it rather than the household Wi-Fi.
Solar-powered security cameras
Solar cameras suit long fences, farms, construction sites and areas without power. The calculation is the same as any small solar system: the daily consumption of the camera and transmitter, the hours required at night and on cloudy days, then the panel and battery size. We pair them with wireless or SIM transmission and lithium batteries that tolerate heat, and prefer ready-made standalone poles when there are several points. Details on the solar page.
Small and hidden cameras: what is allowed?
We get many questions about the smallest security camera and about hidden cameras. Small cameras (pinhole and mini dome) have legitimate uses: ATMs, lifts and tight points of sale, installed as part of the system with signage announcing surveillance. Installing hidden cameras in private areas or recording people without their knowledge breaks Saudi Arabia's anti-cybercrime law and the security camera regulations, and we do not do it. We design visible systems with clear signage and aim cameras away from neighbouring property and private areas.
Cameras with audio
Many modern cameras have a microphone and speaker for talking to a visitor at the door. Audio recording is more privacy-sensitive than video, so we enable it at private entrances with the owner's consent only, and keep it off in staff and customer areas unless there is a clear lawful reason.
Recorder, monitor and storage
The camera captures; the recorder stores and displays. With network (IP) cameras it is an NVR; with older analogue cameras a DVR. What to decide: channel count with room to grow, disk capacity calculated from resolution and retention (30 days is usual for commercial sites), and surveillance-grade disks rather than ordinary PC drives. The monitor in a guard room is an industrial display rated for 24-hour use, not a household TV.
How to choose the right camera for your site
- Write down what each point must show: a face at the door, a number plate at the gate, general movement in the yard. That sets resolution and lens before the model.
- Outdoor needs IP66 or better and heat tolerance; indoor needs to be discreet.
- Choose cable (PoE) whenever possible, and wireless, SIM or solar where there is no alternative.
- Calculate storage from resolution, camera count and retention days, with spare channels.
- Post surveillance signs, aim cameras within your property and restrict access to recordings.
PREVARO is not a camera shop and does not sell equipment at retail; we are a CCTV installation company in Riyadh that designs the system, writes vendor-neutral specifications, installs and maintains it, for houses, villas, shops and facilities. To place cameras yourself before asking for a price, try the design tool, or read how we set pixel density so the footage is usable.
Frequently asked questions about camera types
What are the best security cameras for homes?
There is no single best camera for every house; the best is a mix: a 4 MP turret at each entrance, a bullet on the fence and parking, and an NVR with 30 days of storage and a phone app. Height and angle matter more than the model.
Are wireless cameras better than wired?
Wired (PoE) is more reliable and clearer and immune to interference, so it is the first choice when cabling is possible. Wireless is the answer where cabling cannot be done, with a network designed for it.
Is there a camera that works without internet and without power?
Yes: a SIM camera with a solar panel and battery. It suits farms, rest houses and construction sites, records locally on a memory card and sends over the mobile network.
How many days does the recorder keep video?
It depends on disk capacity, resolution and camera count. 30 days is usual for shops and facilities, and we size the disks for that with a margin.
Is it legal to install hidden cameras?
Not in private areas or without people's knowledge; it can expose you to liability. We install visible systems with signage and aim cameras within your property.
What is the difference between a 4K camera and a 4 MP camera?
4K equals 8 MP and gives more daytime detail with more storage, but is usually less sensitive at night. For most sites 4 or 5 MP with the right lens is enough; we use 4K where digital zoom on a wide scene is needed.