Monitors & Brackets
A quality CCTV system needs a quality monitor to really show off those stunning images. This high-spec range of monitors that have been specifically manufactured to be used with CCTV systems to do just that! With sizes up to 32", there's a model to suit every environment with a wide range of versatile brackets to keep them up out of harms way and easy to view at the same time.
A quality CCTV system needs a quality monitor to really show off those stunning images and we have a model to suit every environment with a wide range of versatile brackets.
Ideal for keeping your CCTV installation neat & tidy, there's a model to suit any size of TV or LCD screen.
Range of HD test monitors for testing and configuring your cameras. Our latest test monitors are 4K compatible and have a full Qwerty keyboard for IP camera setup.
Useful range of HDMI leads and adaptors ideal for connecting up CCTV recorders with screens or for general use with TVs.
Quality pre-moulded BNC-BNC (plug) leads in a range of lengths from 20cm to 20m.
A best selling range thanks to their attractive design and low cost. HD ready, they are the professional choice for any CCTV systems where extended operator viewing is required.
These larger LED monitors not only offer excellent wide-screen 4K viewing, perfect for displaying multiple cameras, they also have a slimline design so you can install them neatly against the wall.
An attractive heavy duty bracket for fitting LCD screens up to 50" to a wall.
After streamlining our LCD bracket range in the last catalogue just a few items remain so they're available now with 25% off. Grab them whilst you can!
Monitor brackets for professional CCTV installers and is pre-assembled and tested so it can be installed straight away right out of the box.
Slim slot on universal monitor bracket for screens up to 37", it’s a great option where space is tight.
Our thinnest and flattest LCD bracket yet sitting at just 11mm from the wall, it’s a great option where space is tight.
Fitting monitors is a breeze if you know how! Watch these videos to learn more...
Read more in our FAQs.
- How can I remove Earth Loop Interference problems from CCTV installations?
- By using good CCTV power supplies you will minimise ground loops. If they still exist the Humbloc terminates ground loop currents in a cable and blocks the hum and interference carried in the ground loop.
A common problem many installers face with CCTV installations is earth or ground loop problems. Many CCTV installers have seen the classic symptoms of the rolling humbar or the tearing picture but don't understand the cause of the problem and the solutions to cure it. They may have even seen a small spark or felt a slight tingle when they disconnect interlinking cables from DVRs and other equipment; these are all signs of ground loop problems. (Please note - a tearing picture can also be caused by a weak signal and a humbar by over-voltage or an unregulated power supply used with a 12V camera such as a 13.8V alarm PSU).So, what is a ground loop?
A ground loop occurs when there is more than one "ground" or "earth" between two pieces of equipment. Because the two pieces of equipment have multiple ground paths, loops (circuits) are formed in which current can flow.
The current flowing through this unwanted circuit in the CCTV system can have a devastating effect on the system's performance. The current flows through the shield of co-ax types of cable and instead of "dragging" any interference (usually 50Hz mains hum) down to a "true" ground at the receiving end of the cable, it actually picks this interference up (in its ground loop antenna!) and carries it to the sensitive inputs of CCTV equipment such as DVRs, distributors and Switchers. The DVR, distributor or switcher simply interprets this "interference hum" as part of the intended video signal entering the equipment and displays it on the monitor as a rolling "hum" bar.
The small voltage difference in the two groups sets up a ground loop current. This current picks up interference as the circuit created by the ground loop acts as an antenna. The 50Hz Mains interference picked up is displayed on the monitor as a humbar.
So how can you prevent ground loops?
In practice this is hard to do as each CCTV system is pretty much bespoke so you can't apply general rules. In systems that have different types of CCTV cameras installed with different types of power supplies, there is a greatly increased chance that some of the cameras and other pieces of equipment may have different ground potentials. Two pieces of equipment only need a "ground voltage" difference of 0.1V (which is tiny) and to be interconnected with an earth cable of 0.1 ohms resistance to form a ground loop current of 1A!! Well designed 12V CCTV power supplies are often "double-insulated" and the 0V output is in effect floating. This has the benefit that it can "float up or float down" to the ground potential of other equipment minimising ground loop problems. Some other power supplies such as "alarm-power supplies" may clamp the 0V output to an electrical earth causing ground loop problems with CCTV equipment. YOU SHOULD NEVER remove the electrical safety earth of mains equipment in an attempt to remove a ground loop as it can endanger lives.
By carefully using good CCTV power supplies you will minimise ground loops but if they still exist then a device that blocks the current flowing down the earth connection is an option. The Humbloc simply terminates ground loop currents in a cable and blocks the hum and interference carried in the ground loop.
The Humbloc prevents the ground-loop in the cable - blocking the "humbar" interference on the monitor:
More information for the general public at our website: www.cctvmate.com
