CCTV Camera Types & Technologies — A Complete Guide for Building Security
Understanding camera form factors, image sensor technologies, lens types, low-light capabilities, and AI-powered features — so you can specify the right camera for every location in your building.
Selecting the right CCTV camera for each location in a building requires understanding the full range of camera types, sensor technologies, lens options, and compliance requirements — not just resolution and brand name. This guide covers everything a facility manager or procurement officer needs to make informed, vendor-neutral decisions about camera specification.
1. How a CCTV Camera Works — From Light to Image
Before exploring the different types of cameras available, it is worth understanding the fundamental mechanism by which any CCTV camera converts a real-world scene into a digital video image. This knowledge helps facility managers appreciate why specifications like sensor size, lens focal length, and aperture directly affect image quality — and why a camera that looks identical on a datasheet can perform very differently in the real world.
The Optical Chain
Every CCTV camera — whether a simple dome in a corridor or a sophisticated PTZ on a building perimeter — operates on the same basic principle: light reflected from objects in the scene passes through a lens, which focuses it onto an image sensor. The sensor converts the light into electrical signals, which are then processed by the camera's digital signal processor (DSP) into a video stream. The entire process happens continuously, typically 15 to 30 times per second, producing the smooth motion video we see on monitors.
The Process Step by Step
Step 1 — Light from the Scene: Every object in the camera's field of view reflects light. This reflected light — carrying the colour, brightness, and shape information of the scene — travels toward the camera. The amount of available light (measured in lux) is the single most important environmental factor affecting image quality, which is why low-light performance is such a critical camera specification.
Step 2 — The Iris (Aperture Control): Before reaching the lens, light passes through the iris — an adjustable diaphragm that controls how much light enters the optical system. In bright conditions, the iris closes down to prevent overexposure; in dim conditions, it opens wide to admit maximum light. The F-number on a camera's datasheet (e.g., f/1.2, f/1.4, f/2.0) describes the maximum aperture — a lower number means a wider opening and better low-light capability. Auto-iris lenses, which adjust automatically based on lighting conditions, are essential for outdoor cameras that must handle both bright daylight and dark nighttime.
Step 3 — The Lens (Focusing Light): The lens is a precisely shaped assembly of glass (or optical-grade plastic) elements that bends (refracts) incoming light rays so that they converge and form a focused image on the sensor surface. The focal length of the lens — measured in millimetres — determines two things: the field of view (how wide an area the camera sees) and the magnification (how large objects appear in the image). A short focal length (e.g., 2.8mm) provides a wide field of view suitable for small rooms, while a long focal length (e.g., 50mm) provides a narrow, zoomed-in view ideal for capturing detail at a distance.
Step 4 — The Image Sensor (Light to Electricity): The image sensor is a silicon chip containing millions of tiny photosites (pixels), each of which converts incoming photons of light into a proportional electrical charge. Modern CCTV cameras universally use CMOS (Complementary Metal-Oxide-Semiconductor) sensors. The number of pixels determines the camera's resolution — a 4MP (four megapixel) sensor has approximately four million photosites. The physical size of the sensor matters enormously: larger sensors have larger individual photosites, which capture more light and produce cleaner, brighter images in low-light conditions. A colour filter array (typically a Bayer pattern of red, green, and blue filters) over the photosites enables the camera to capture colour information.
Step 5 — The DSP (Digital Signal Processor): The raw electrical signals from the sensor are noisy and imperfect. The camera's DSP — an embedded System-on-Chip (SoC) — performs extensive processing: noise reduction (3D-DNR), white balance correction, wide dynamic range processing (combining multiple exposures for WDR), gamma correction, sharpening, and finally compression into a standard video codec (H.264 or H.265). This is where much of the camera's image quality is determined — two cameras with identical sensors can produce very different results depending on the quality of their DSP algorithms.
Step 6 — Network Transmission: The compressed digital video stream is packetised and transmitted over the Ethernet network to the NVR or VMS server. In an IP camera system, the same Ethernet cable that carries the video data also delivers electrical power to the camera via Power over Ethernet (PoE), eliminating the need for separate power cabling.
Step 7 — Recording and Display: The video stream reaches the NVR or VMS server, which simultaneously records it to storage (hard drives or SAN) and makes it available for live viewing on operator workstations and monitors. The recorded footage is indexed and searchable, enabling rapid playback and evidence retrieval when needed.
2. Camera Form Factors
The form factor of a camera refers to its physical shape and housing design, which determines how it mounts, where it works best, and how it is perceived by people in the surveillance area. Each form factor is engineered for specific deployment scenarios.
Dome Camera
The dome camera is the most widely deployed form factor in commercial buildings. Enclosed in a hemispherical housing, it is designed for ceiling or wall mounting and is valued for its unobtrusive appearance and resistance to tampering. The curved dome cover makes it difficult for observers to determine the exact direction the camera is pointing, adding a psychological deterrent effect beyond the camera's actual field of view.
Dome cameras are available in mini-dome variants (compact, ceiling-recessed, ideal for aesthetic-sensitive environments like hotels and premium offices), vandal-dome variants (reinforced IK10-rated housing for public areas, parking garages, and correctional facilities), and outdoor dome variants (with built-in heater, fan, and weather sealing for external installations).
Key consideration: A common issue with dome cameras is IR reflection — when the camera's built-in infrared LEDs reflect off the dome cover at night, creating a bright haze that washes out the image. Quality dome cameras address this with a black surround (ring) that absorbs stray IR light, or with IR LEDs positioned outside the dome housing. Always verify night-time image quality during commissioning.
Bullet Camera
Bullet cameras are cylindrical in shape and project outward from a wall or pole mount, making them highly visible — which is a deliberate feature. Their prominent form communicates "this area is under surveillance" to anyone approaching the building. The elongated housing accommodates larger lens assemblies and more powerful IR illuminators, enabling longer-range coverage than comparably priced dome cameras.
The built-in sun shield is not merely cosmetic — it prevents direct sunlight from hitting the lens and causing glare or sensor damage. For outdoor installations in India, where temperatures can exceed 45°C in summer, always verify the camera's operating temperature range and consider models with internal cooling fans for extreme environments.
Key consideration: Bullet cameras are easily misaligned by wind, vibration, or accidental impact due to their projecting design. Ensure mounting brackets are heavy-duty and periodically verify camera alignment during maintenance visits.
PTZ Camera (Pan-Tilt-Zoom)
PTZ cameras are the most versatile and powerful camera type available. They can pan (rotate horizontally, typically 360° continuous), tilt (rotate vertically, typically 90° or more), and zoom (20x to 40x optical zoom is standard). This allows a single camera to cover a vast area and zoom in to identify a specific individual or read a vehicle registration plate from a considerable distance.
Modern PTZ cameras can be configured with preset positions — the camera automatically cycles through predefined viewing positions on a scheduled patrol pattern. When triggered by an alarm or analytics event, the camera can instantly snap to the relevant preset position to capture the incident. Advanced AI-enabled PTZ cameras can even auto-track a moving person or vehicle across the scene.
Key consideration: A PTZ camera that is zoomed in on one area is simultaneously blind to all other areas. Never rely on a single PTZ camera as the sole surveillance for a critical zone. Best practice is to pair each PTZ with fixed cameras that provide continuous wide-angle coverage, while the PTZ is used for detailed investigation and tracking. PTZ cameras also have moving mechanical parts (motors, gears), which means a higher maintenance requirement and a shorter lifespan compared to fixed cameras.
Power requirement: PTZ cameras draw significantly more power than fixed cameras — typically 30–60 watts. Ensure PoE+ (802.3at, 30W) or PoE++ (802.3bt, 60W/90W) switches are specified, not standard PoE (802.3af, 15.4W).
Turret / Eyeball Camera
The turret camera (also called an eyeball camera) is a modern alternative to the traditional dome. Its ball-and-socket design allows the camera module to be rotated freely within the housing to aim in any direction, without needing to loosen mounting screws. Unlike dome cameras, turret cameras do not have a dome cover — the lens and sensor are exposed behind a flat or slightly curved window. This eliminates the IR reflection problem that plagues dome cameras, resulting in cleaner night-vision images.
Turret cameras have gained significant popularity in recent years and are now the preferred choice for many installers and consultants for general-purpose surveillance. Their compact size, ease of installation, superior night vision (no dome glare), and competitive pricing make them an excellent default option for most indoor and semi-outdoor locations.
Fisheye / Panoramic Camera
Fisheye cameras use an ultra-wide-angle lens to capture a 180° or 360° panoramic field of view from a single unit. When mounted on a ceiling at the centre of a room, a single fisheye camera can replace four or more conventional cameras, covering the entire room without blind spots. The raw fisheye image is circular and distorted, but the VMS or the camera's built-in software "dewarps" it into multiple conventional rectangular views that operators can pan, tilt, and zoom within digitally.
Key consideration: While fisheye cameras reduce the total camera count, the pixel density at any given point in the scene is lower than a fixed camera dedicated to that area. This means identification-level detail (face recognition, number plate reading) at the edges of the fisheye view may be insufficient. Use fisheye cameras for overview coverage and combine them with dedicated fixed cameras for areas requiring identification-level detail.
Multi-Sensor / Multi-Imager Camera
Multi-sensor cameras house two, three, or four independent image sensors and lenses within a single camera body. Each sensor covers a different segment of the scene, and the VMS stitches them together into a seamless panoramic image. Unlike fisheye cameras, multi-sensor cameras maintain high pixel density across the entire panoramic view because each sensor is dedicated to its portion of the scene — there is no dewarping-related quality loss.
Multi-sensor cameras reduce installation points, cable runs, and switch ports — a single 4-sensor camera replaces four individual cameras while delivering equivalent or superior image quality. However, they are more expensive per unit and more complex to configure. They also consume more bandwidth and storage than a single standard camera.
Thermal Camera
Thermal cameras detect infrared radiation (heat) emitted by objects, not visible light. This makes them effective in conditions where conventional cameras fail: complete darkness, fog, smoke, rain, and through light camouflage. Every object above absolute zero emits infrared radiation, and thermal cameras convert these heat signatures into a visible image where warmer objects appear brighter.
Thermal cameras cannot identify individuals (they produce heat maps, not recognisable images), so they are used for detection and alerting, not identification. Best practice in critical perimeter applications is to pair a thermal camera with a PTZ camera: the thermal camera detects an intrusion across a wide perimeter and triggers the PTZ to automatically slew to the detection point and capture a high-resolution optical image for identification.
Bi-spectrum cameras combine a thermal sensor and an optical sensor in a single housing, providing both heat detection and visual identification capability. These are increasingly popular for critical infrastructure protection — power substations, oil and gas facilities, data centres, and currency chests.
ANPR / LPR Camera
Automatic Number Plate Recognition (ANPR) — also called License Plate Recognition (LPR) — cameras are purpose-built to capture and read vehicle registration plates at speed. They combine specialised hardware (narrow field of view, fast shutter speed, pulsed IR illumination to overcome headlamp glare at night) with on-board or server-based OCR (Optical Character Recognition) software that extracts the plate number and logs it with timestamp, direction, and associated vehicle image.
India-specific note: Indian number plates follow a specific format (State Code - RTO Code - Series - Number). Ensure the ANPR software being procured has been trained and tested on Indian plate formats, including older yellow-on-black plates, newer white/green plates, and the high-security registration plate (HSRP) format. Software trained primarily on European or American plates may have poor accuracy on Indian plates.
Covert / Pinhole Camera
Covert cameras are designed to be hidden or inconspicuous. They use pinhole lenses (extremely small lens openings, typically 1–3mm) that can be concealed behind a tiny hole in a wall, ceiling, or fixture. The camera body is a separate unit, connected to the pinhole lens module via a thin cable. In legitimate applications, they are used in ATM face-capture positions (behind the ATM bezel, capturing the user's face during transactions), and in special investigation scenarios authorised by management.
Legal caution: The use of covert surveillance cameras in India is subject to legal restrictions. While there is no blanket ban, covert cameras must never be placed in locations where there is a reasonable expectation of privacy (washrooms, changing rooms, hotel rooms). All covert camera deployments should be formally authorised by the building owner/management, documented, and reviewed for compliance with applicable laws including the Information Technology Act and the Digital Personal Data Protection Act, 2023.
3. Image Sensor Technology
The image sensor is the heart of any camera — it is the silicon chip that converts light into an electrical signal, which is then processed into a digital video image. The quality of the sensor determines the camera's resolution, low-light performance, colour accuracy, and dynamic range. Understanding sensor technology helps facility managers evaluate cameras beyond the headline resolution number.
CCD vs CMOS — The Technology Shift
Historically, two sensor technologies competed in the CCTV market: CCD (Charge-Coupled Device) and CMOS (Complementary Metal-Oxide-Semiconductor). CCD sensors were long considered superior for their image quality and uniform noise characteristics. However, CMOS technology has advanced dramatically, and today virtually all professional IP cameras use CMOS sensors. The reasons are compelling: CMOS sensors consume far less power, can be manufactured at higher resolutions more economically, support higher frame rates, and enable on-chip processing features (such as WDR and noise reduction) that CCD sensors cannot. CMOS sensors also allow individual pixel readout, which enables features like region-of-interest (ROI) streaming.
Sensor Size — Why It Matters
The physical size of the image sensor has a direct impact on image quality, particularly in low-light conditions. A larger sensor has larger individual pixels (photosites), which capture more light photons per exposure, resulting in a brighter image with less electronic noise. Common sensor sizes in CCTV cameras include:
| Sensor Size | Typical Use | Low-Light Performance |
|---|---|---|
| 1/3" | Budget cameras, indoor applications | Basic — adequate in well-lit environments only |
| 1/2.8" | Mid-range cameras, general purpose | Good — performs well in moderate low-light |
| 1/2.7" | Mid-range outdoor cameras | Good to very good |
| 1/1.8" | Premium cameras, starlight models | Excellent — usable colour images in near-darkness |
| 1/1.2" | Ultra-premium, specialised low-light | Outstanding — near-daylight clarity in dark conditions |
Resolution — Beyond the Megapixel Number
Resolution is measured in megapixels (MP) — the total number of pixels the sensor can capture. While higher resolution generally means more detail, it also means more bandwidth, more storage, and more processing power. The right resolution depends on the purpose of the camera at each location:
| Resolution | Pixel Count | Recommended For |
|---|---|---|
| 2MP (1080p) | 1920 × 1080 | General surveillance — corridors, stairwells, storage areas where detection and recognition (not identification) are sufficient |
| 4MP (2K) | 2560 × 1440 | The current sweet spot — offers identification-level detail with manageable bandwidth and storage. Recommended as the default for most new installations |
| 5MP | 2592 × 1944 | Good balance between 4MP and 4K; popular for outdoor applications where extra detail helps at longer ranges |
| 4K / 8MP | 3840 × 2160 | High-value areas requiring forensic-level detail — bank cash counters, entrance face capture, vault monitoring, evidence rooms |
| 12MP and above | 4000 × 3000+ | Specialised applications — fisheye cameras, multi-sensor cameras, wide-area overview where digital zoom into specific regions is required |
4. Lens Technology
The lens is what channels light from the scene onto the image sensor. It determines the camera's field of view (how wide an area it can see), depth of field (how much of the scene is in focus simultaneously), and light-gathering ability. Understanding the basic principles of lens selection is essential for specifying the right camera for each location.
Focal Length and Field of View
Focal length, measured in millimetres (mm), determines how much of the scene the camera can see:
- Short focal length (2.8mm – 4mm): Wide field of view (90°–110°). Captures a broad area but with less detail on distant objects. Ideal for small rooms, corridors, lift interiors, and areas where subjects are close to the camera.
- Medium focal length (6mm – 12mm): Moderate field of view (40°–60°). Good balance between coverage area and detail. Suitable for larger rooms, parking areas, and building facades at moderate distances.
- Long focal length (25mm – 50mm+): Narrow, telescopic field of view (10°–25°). Captures fine detail at long range but covers a very limited area. Used for perimeter fence lines, long driveways, and specific choke points.
The fundamental relationship is inverse: as focal length increases, field of view decreases but magnification increases. A 2.8mm lens sees a wide scene at low detail; a 50mm lens sees a narrow slice at high detail.
Lens Types
Fixed Focal Length
The lens has a single, unchangeable focal length (e.g., 2.8mm, 3.6mm, 6mm). Simple, reliable, and cost-effective. The installer selects the appropriate focal length during design, and the camera's field of view is permanently set. Best for locations where the coverage area is well-defined and unlikely to change.
Varifocal
The focal length can be adjusted within a range (e.g., 2.7–13.5mm) by manually turning a ring on the lens. This allows fine-tuning the field of view during installation. After adjustment, the lens is locked in position. Varifocal lenses require manual focus adjustment after changing the focal length. Ideal when the exact field of view needed cannot be determined until the camera is physically installed and aimed.
Motorised Zoom
Similar to varifocal, but the zoom and focus adjustments are motor-driven and can be controlled remotely via the VMS or camera web interface. This eliminates the need for a technician to physically access the camera to adjust the lens — a significant advantage for cameras mounted at height or in difficult-to-access locations. Increasingly standard in mid-range and premium cameras.
Iris Control — Managing Light
The iris is the adjustable aperture within the lens that controls how much light reaches the sensor. Proper iris control is essential for cameras that operate across varying lighting conditions (day and night, indoor/outdoor transitions):
- Fixed Iris: The aperture is permanently set. Suitable only for indoor environments with consistent lighting.
- Manual Iris: The aperture can be manually adjusted during installation but does not change automatically. Limited use in CCTV.
- Auto Iris (DC-iris): The camera automatically adjusts the aperture based on light levels. Essential for outdoor cameras and any location with changing light conditions.
- P-Iris (Precise Iris): An advanced auto-iris system where the camera and lens communicate digitally to set the optimal aperture for each lighting condition. P-Iris delivers sharper images, better contrast, and improved depth of field compared to standard DC-iris lenses. Recommended for premium installations.
- i-CS (intelligent CS-mount): The latest lens technology from Axis Communications and adopted by other manufacturers. It provides even finer aperture control and real-time lens optimisation. Currently found in high-end professional cameras.
5. Low-Light & Night Vision Technologies
Building surveillance operates 24 hours a day, and some of the most critical security events occur at night. The ability of a camera to produce clear, usable footage in low-light and no-light conditions is one of the most important performance differentiators. Several technologies address this challenge:
Infrared (IR) Illumination
The most common night-vision technology. Built-in IR LEDs emit infrared light (invisible to the human eye) that illuminates the scene. The camera's sensor detects the reflected IR light and produces a monochrome (black-and-white) image. Effective range varies from 20m (mini-dome) to 150m+ (long-range bullet). The limitation: IR images lack colour, which means clothing colour, vehicle colour, and other colour-based identifiers are lost at night.
Starlight / Ultra Low-Light Sensors
Starlight cameras use large, high-sensitivity CMOS sensors (typically 1/1.8" or larger) combined with fast lenses (f/1.0 to f/1.4) and advanced signal processing to capture colour images in extremely low light — down to 0.001 lux, which is equivalent to starlight or moonlight conditions. Sony's STARVIS and STARVIS 2 sensor technology has been widely adopted. These cameras deliver full-colour images at night where older cameras would show only darkness or noisy monochrome.
Full-Colour Night Vision (White Light)
These cameras use built-in white LED spotlights (similar to a torch) to illuminate the scene with visible light, enabling the camera to capture full-colour images even in complete darkness. The trade-off is that the spotlight is visible and may be intrusive in residential or hospitality environments. Best suited for perimeter areas, car parks, and commercial zones where visible lighting is acceptable or even desirable as a deterrent.
Smart IR / Adaptive IR
Standard IR illuminators can overexpose subjects that are close to the camera (a person standing 3 metres away appears completely white while the background is visible). Smart IR or Adaptive IR technology automatically adjusts the intensity and angle of IR illumination based on the distance of subjects in the scene, ensuring even illumination across the entire field of view. This is now standard on most professional-grade cameras.
WDR — Wide Dynamic Range
Wide Dynamic Range is not a night-vision technology per se, but it is critically important for building surveillance. WDR addresses the challenge of scenes with extreme contrast between bright and dark areas — a building entrance where sunlight floods through glass doors while the interior is dim, a corridor with windows at one end, or an ATM lobby with strong overhead lighting and deep shadows.
A camera without WDR will either expose for the bright area (leaving the dark area as a black silhouette) or expose for the dark area (leaving the bright area as a white overexposed blob). WDR cameras capture multiple exposures at different settings and combine them into a single image where both the bright and dark areas are clearly visible. True WDR (120dB or higher) uses hardware-based multi-exposure processing; digital WDR is a software approximation that is less effective.
6. Video Compression & Bandwidth
Video compression determines how efficiently the camera encodes its video stream for transmission and storage. More efficient compression means less network bandwidth consumed and less storage required — which translates directly to lower infrastructure costs.
| Codec | Generation | Bandwidth/Storage Efficiency | Status |
|---|---|---|---|
| MJPEG | Legacy | Baseline — highest bandwidth consumption | Obsolete for recording; still used for some snapshots |
| H.264 (AVC) | 2003 | ~50% more efficient than MJPEG | Still widely supported; being replaced by H.265 |
| H.265 (HEVC) | 2013 | ~50% more efficient than H.264 | Current standard for new installations |
| H.265+ / Smart Codec | 2016+ | ~50–80% more efficient than standard H.265 | Proprietary enhancements by major vendors; reduces static scene bitrates dramatically |
Smart Codec technologies (marketed under various brand names — Zipstream by Axis, WiseStream by Hanwha, Smart Codec by Hikvision/Dahua) analyse each frame and apply higher compression to static background areas while preserving full quality on moving subjects and regions of interest. In scenes with limited motion (a corridor at night, for instance), these technologies can reduce bandwidth by up to 80% compared to standard H.265.
7. Environmental Protection Ratings
Cameras deployed outdoors or in challenging environments must be rated for the conditions they will face. Two international rating systems apply:
IP Rating (Ingress Protection)
The IP rating is a two-digit code indicating protection against solids (first digit) and liquids (second digit):
- IP65: Dust-tight; protected against low-pressure water jets from any direction. Suitable for covered outdoor areas.
- IP66: Dust-tight; protected against powerful water jets. The standard for most outdoor cameras.
- IP67: Dust-tight; protected against temporary immersion in water (up to 1m for 30 minutes). Recommended for outdoor installations in India where monsoon conditions are severe.
- IP68: Dust-tight; protected against continuous submersion. Specialised applications only.
IK Rating (Impact Protection)
The IK rating indicates resistance to mechanical impact:
- IK08: Withstands 5 joules of impact (equivalent to a 1.7 kg weight dropped from 300mm). Sufficient for most indoor applications.
- IK10: Withstands 20 joules of impact (equivalent to a 5 kg weight dropped from 400mm). Required for public areas, parking garages, vandal-prone locations, and PSU buildings where tampering risk exists.
Operating Temperature
India's climate demands particular attention to temperature ratings. Standard cameras are rated for –30°C to +60°C. However, in direct sunlight on a dark-coloured building facade in Rajasthan or Gujarat, surface temperatures can exceed 70°C. For such installations, specify cameras with extended temperature ratings and consider sun shields, ventilated housings, or shaded mounting positions.
8. AI & Edge Analytics on Cameras
The most significant shift in camera technology in recent years is the integration of AI processing directly into the camera hardware — known as "edge analytics" or "edge AI." Instead of sending raw video to a central server for analysis, the camera itself processes the video stream and generates intelligent metadata, alerts, and classifications.
Common Edge Analytics Features
- Human/Vehicle Classification: The camera distinguishes between humans, vehicles, and other objects (animals, swaying trees, headlights). This eliminates the majority of false motion alerts — a transformative improvement over older pixel-based motion detection that triggered on any change in the scene.
- Intrusion Detection: Triggers an alert when a classified object (person or vehicle) enters a defined zone during specified hours.
- Line Crossing: Detects when a person or vehicle crosses a virtual boundary line — useful for restricted area monitoring and directional traffic enforcement.
- Face Detection: Detects the presence and position of faces in the frame (distinct from face recognition, which identifies specific individuals). Used for face-capture camera optimisation and people counting.
- Object Left / Removed: Detects when an object is placed in a scene and remains (abandoned bag) or when an existing object is removed (theft of equipment).
- Scene Change / Tampering Detection: Alerts when the camera's view is obstructed, redirected, defocused, or spray-painted — a critical anti-tampering feature.
Why Edge Analytics Matters
Processing analytics at the edge (on the camera) rather than on a central server reduces network bandwidth (only metadata and alert clips are transmitted, not full video streams for analysis), eliminates the need for expensive dedicated analytics servers, scales more efficiently (each new camera brings its own processing power), and provides faster response times (alerts are generated instantly without round-trip to a server).
9. Indian Compliance & Certification for CCTV Cameras
As of 2026, CCTV cameras sold in India must comply with a dual certification regime:
- BIS Safety Certification (IS 13252 Part 1): Mandatory since 2018 under the Compulsory Registration Scheme (CRS). Every camera model must carry a valid BIS R-number. Covers electrical safety and electromagnetic compatibility.
- STQC Essential Requirements (ER:01): A cybersecurity certification introduced by MeitY, covering secure firmware, encrypted communications, authentication mechanisms, tamper detection, and protection against unauthorised access. From April 2026, cameras without ER:01 certification will not be permitted for sale.
Additionally, for interoperability:
- ONVIF Compliance: The Open Network Video Interface Forum standard ensures cameras work with VMS platforms and NVRs from different manufacturers. Always specify ONVIF Profile S (streaming) and Profile G (recording) compliance.
10. Camera Specification Checklist for Procurement
Use this checklist when preparing camera specifications for tender documents or evaluating vendor proposals:
✅ Essential Specifications to Verify
- Resolution: Minimum 4MP for general surveillance; 4K (8MP) for identification-critical locations
- Sensor Size: Minimum 1/2.8" for outdoor; prefer 1/1.8" for low-light and critical areas
- Compression: H.265 minimum; H.265+ / Smart Codec preferred
- WDR: True WDR 120dB+ for entrances, lobbies, ATM areas, and mixed-lighting locations
- IR Range: Matched to the camera's intended coverage distance (don't over-specify or under-specify)
- Low-Light Performance: Minimum illumination specification (0.01 lux for standard; 0.001 lux for starlight)
- Lens Type: Fixed, varifocal, or motorised zoom as appropriate for the location
- Iris Control: Auto iris (DC or P-Iris) mandatory for all outdoor cameras
- IP Rating: IP66 minimum for outdoor; IP67 preferred for Indian monsoon conditions
- IK Rating: IK10 for public areas, parking, and vandal-prone locations
- PoE Compliance: IEEE 802.3af for fixed cameras; 802.3at for PTZ and heated housings; 802.3bt for high-power PTZ
- ONVIF Compliance: Profile S (streaming) and Profile G (recording) mandatory
- BIS Certification: Valid R-number under IS 13252 Part 1
- STQC ER:01 Certification: Mandatory from April 2026
- Operating Temperature: Verify range covers your site's extreme conditions
- Edge Analytics: Human/vehicle classification, intrusion detection, line crossing — if specified in the design
- Multi-Streaming: Support for simultaneous streams at different resolutions/frame rates
- Audio: Built-in microphone if audio recording is required (verify legal compliance)
- Micro-SD Slot: On-board storage for edge recording / failover recording when NVR connectivity is lost
- Warranty: Minimum 3 years standard; verify local service support availability
11. Camera Selection Guide by Building Location
The following table provides practical recommendations for camera type and key specifications based on common building locations. These are starting points — actual specifications should be confirmed through a professional site survey.
| Location | Recommended Camera | Key Specs |
|---|---|---|
| Main Entrance (Face Capture) | Turret or Dome, fixed lens | 4K (8MP), 1/1.8" sensor, True WDR 120dB+, starlight, H.265+ |
| Reception / Lobby | Dome or Turret | 4MP, WDR, wide-angle 2.8mm lens, starlight |
| Corridors | Turret or Mini-Dome | 4MP, 2.8mm or 3.6mm lens, corridor mode (9:16 rotation), Smart IR |
| Stairwells | Turret, IK10 | 4MP, wide-angle, vandal-proof, built-in mic (optional) |
| Car Park (Indoor) | Turret or Bullet, IK10 | 4MP, starlight, WDR, ANPR at entry/exit |
| Car Park (Outdoor) | Bullet | 4MP, IP67, 50m+ IR, starlight, WDR |
| Perimeter / Compound Wall | Bullet (long-range) or Thermal + PTZ | 4MP optical + thermal for critical perimeters; 80m+ IR; analytics |
| Vehicle Gate | ANPR Camera + Overview Camera | Dedicated ANPR for plate capture; 4MP overview for vehicle/driver |
| Server Room | Dome, IK10 | 4MP, wide-angle, tamper detection, access-linked recording |
| Cash Counter (Bank) | Turret or Mini-Dome | 4K (8MP), WDR, face capture angle, tamper-proof |
| ATM | Mini-Dome + Pinhole (face capture) | 4MP, WDR, vandal-proof, transaction-linked recording |
| Open Hall / Atrium | Fisheye or Multi-Sensor | 12MP fisheye or 4×4MP multi-sensor; people counting analytics |
| Lift Interior | Mini-Dome, vandal-proof | 2–4MP, wide-angle 1.8–2.8mm, IK10, compact, anti-vibration |
Need Help Selecting the Right Cameras?
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