Smoke Screen Sentinel S150 Security Fog/Cloak Machine
- 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)
The Sentinel S150 is Smoke Screen's newest and fastest security fog generator. It makes use of a dual pump powered, dual helix heater block allowing for a rapid through flow of the fog consumable. What does all that mean in real terms? Well, put simply it means that the fog is produced very quickly indeed. Due to the velocity of the fog plume, the generator can be installed much higher than other generators and the fog will still hit the floor with enough force to rapidly spread into areas where obscuration is needed.
- Extreme fog production to very high obscuration levels.
- Individually adjustable dual nozzles to tune cover to all areas where cover is needed.
- High velocity fog allows for higher-than-normal mounting locations.
- Supports automatic re-firing via screen-sensor technology.
- Dry fog is guaranteed to leave no residue and won't damage your goods.
- Persistent fog production – small particle size means the smoke will last up to 40 minutes unventilated.
- Supports automatic re-firing via screen-sensor technology.
- Energy-saving mode.
- Battery back-up for off-mains operation (min. 1.5 hours).
- Now compatible with Sentinel+ IP cards and the Sentience monitoring platform.
- Compliant with International (IEC62642:8) and European Standards (EN50131:8).
- Mains power supply: an unswitched 13 amp fused spur connected to a dedicated breaker.
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New Sentinel range (security smoke generators)
