REDWALL SIP-3020 30 x 20m external PIR detector with advanced detection algorithm
- 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 REDWALL SIP is a series of long range volumetric outdoor PIRs designed to work in conjunction with CCTV systems and trigger camera position to the zone of intrusion. Very stable in outdoor environment the Redwall SIP sensors have a very low false alarm rate and are instrumental for make event-triggered security system sstable. The SIP-3020 is a hardwired model providing a detection range of 30m length by 20 wide ideal to cover car parks, yards and other wide areas.
Designed to trigger CCTV systems
The REDWALL SIP series is designed to be connected to PTZ or fixed dome cameras and trigger the CCTV system when an intrusion occurs. The SIP-3020 has two independent detection zones, far and near zones, with independent sensitivity selection, that can trigger the right camera pre-sets and provide the best view of the scene to local security staff or remote monitoring stations.
Weather and vandal-resistant
The SIP PIRs are designed to be used in harsh outdoor environment, their sensitivity are adjusted automatically to the ambient temperature and illuminance and they have a IP65 rating for the main unit. They also vandal-resistant featuring a polycarbonate housing, an accelerometer to detect if the sensor position has been tampered with and an active infrared antimasking.
Key Features
- 30x20m intelligent PIR for approach detection
- Designed to trigger CCTV systems
- Two independent detection zones far/near
- AIR antimasking and vandal-resistant