Ajax Superior StreetSiren Plus Jeweller
- CCTV Lens Guide
- Hard Drive Size Guide
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
Superior StreetSiren Plus Jeweller
Reliable alerts with smart sabotage protection – built to stand out and stay secure, inside or out.
When every second counts, the Superior StreetSiren Plus makes sure everyone knows what’s happening. Whether it’s deterring an intruder or confirming an alarm event, this wireless siren delivers loud, clear, and unmistakable signalling in virtually any environment. Designed for both indoor and outdoor installations, it blends high acoustic output with a distinctive LED frame and robust tamper protection - all fully managed through Ajax apps.
Built for commercial premises, residential buildings, and high-risk environments alike, this siren simplifies installation while enhancing system performance. It adds confidence to every fit, giving end users both peace of mind and a clear indication of their security system’s status.
Why it’s worth fitting:
Powerful, adjustable sound
With selectable tones and volumes up to 113 dB, the siren ensures alerts are always heard without being unnecessarily disruptive.
Bright LED frame for instant visibility
The large, built in LED indication provides clear visual alerts, even in bright daylight, and confirms system arming status at a glance.
Up to 10 years of battery life
Enhanced batteries offer exceptional longevity, helping installers reduce maintenance visits and system downtime.
Built for the elements
With an IP54 rated enclosure, the siren resists dust and water, making it equally reliable indoors or out.
Dual tamper protection
Sensors detect both attempts to open the casing and attempts to remove the siren from its mount - raising alerts immediately.
Chime feature for entry points
When paired with an Ajax opening detector, the siren can act as a doorbell-style chime - ideal for shopfronts or offices.
Flexible power options
Pre-installed batteries and optional external power terminals offer multiple fitting approaches, with no compromise on performance.
Extended wireless range
Thanks to Ajax’s Jeweller protocol, the siren can communicate with a hub or range extender up to 1,500 metres away in open space.
Smart, professional-grade features you can trust:
- Jeweller radio protocol with two-way encrypted communication, frequency hopping, and signal strength adjustment.
- Firmware-adjustable alarm duration - from 3 seconds to 3 minutes (or 15 minutes with updated firmware).
- Remote control and configuration via Ajax PRO apps, keeping installers efficient and flexible.
- Push notifications and system alerts to inform users about tamper events, low battery, or enclosure interference.
- Compliant with EN 50131 (Grade 2), PD 6662:2017, and NFA2P, ideal for insurance-backed systems.
Where it fits best:
- Retail storefronts, with the chime function acting as a friendly notifier for door activity.
- Warehouses and workshops, where volume, range, and reliability are critical.
- Residential driveways or entrances, for high-visibility deterrent and peace of mind.
- Gated compounds or industrial sites, where tamper detection and external mounting are essential.
- Offices and schools, using LED status indication for easy system awareness at a glance.
With Superior StreetSiren Plus Jeweller, you’re fitting more than just a siren - you’re installing a dependable, professional grade signalling device built to keep people aware and intruders away.
