How to Choose a Monitor for a DVR, NVR, or Security Camera System: 5 Common Setups
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Choosing a Security Monitor Isn't Just About Screen Size
When shopping for a monitor for a surveillance system, it's easy to start with screen size:
"Do I need an 18-inch, 22-inch, or 27-inch monitor?"
But screen size usually isn't the first question you should ask.
The better question is: What equipment does the monitor need to connect to?
A monitor used with a modern NVR has different requirements from one used to test a coax camera directly. And a security desk that operates continuously has different needs from a monitor that is only used occasionally.
Here's how to choose the right monitor for your setup.
Scenario 1: You're Connecting a DVR or NVR Through HDMI
This is the simplest setup.
DVR/NVR → HDMI → Monitor
First, check the recorder's HDMI output resolution.
Many newer surveillance recorders can output high-resolution video, including 4K. Your monitor doesn't necessarily need a native 4K panel, but it does need to accept the signal being sent by the recorder.
For example, a compact surveillance monitor may accept a 4K HDMI input and downscale it to its native display resolution.
This can be useful in a server rack, security desk, checkout area, or other installation where a large 27-inch or 32-inch display simply isn't practical.
Best for: NVR systems, DVR systems, compact security desks and space-constrained installations.
Scenario 2: You Want to Connect a Security Camera Directly to the Monitor
This is where a standard computer monitor often isn't enough.
If the camera uses a BNC/coax connection, look for a monitor with a compatible BNC input.
The basic setup becomes:
Camera → BNC → Monitor
This is especially useful for installers.
Instead of connecting the camera to a recorder and then connecting the recorder to a display just to verify the picture, a compatible camera can be connected directly to the monitor for live viewing.
But check the video standard carefully.
For HD-over-coax cameras, determine whether the system uses TVI, AHD, CVI, or CVBS, and verify that the monitor supports the required format and resolution.
Best for: CCTV installers, camera testing, maintenance benches and direct live viewing.
Scenario 3: You're Maintaining an Older CCTV System
Not every security installation is new.
Many businesses still operate surveillance systems that combine older analog equipment with newer DVRs, cameras, and displays.
This is where having both HDMI and BNC connectivity becomes particularly useful.
Rather than adding adapters and converters every time you encounter a different signal, a purpose-built security monitor can provide native connections for multiple types of surveillance equipment.
For technicians maintaining existing systems, that flexibility can matter much more than having the latest consumer-monitor features.
Best for: Legacy CCTV upgrades, mixed-generation systems and professional maintenance.
Scenario 4: You Need a Monitor for a Small Security Desk
Bigger isn't always better.
A 27-inch or 32-inch screen can be excellent in a large control room, but it may be awkward at:
- A cashier station
- A small guard booth
- A server rack
- A reception desk
- A retail counter
- An installer workbench
In these environments, a compact security monitor can provide enough screen space for live surveillance without taking over the workstation.
Consider the monitor's physical dimensions, stand, mounting options and connection placement—not just the advertised screen size.
Scenario 5: You Need to Send the Camera Signal to Another Device
If your installation requires one camera signal to continue to another compatible device, look for BNC loop-out.
For example:
Camera → Monitor → DVR
or
Camera → Monitor → Second Monitor
This can create a cleaner professional installation without relying on additional external adapters for every connection.
What About Video Delay?
For many security applications, live viewing matters.
At a security desk, checkout counter, entrance gate, or installation bench, the operator may be watching events as they happen.
Direct video connections can help keep the signal path simple. When comparing monitors, consider how the signal is processed and whether the product is designed specifically for real-time surveillance viewing.
Avoid choosing a monitor based only on resolution specifications—the way the monitor handles your actual security video source matters just as much.
A Quick Security Monitor Buying Checklist
| Your System | What to Look For |
|---|---|
| DVR / NVR | Compatible HDMI input resolution |
| 4K-output NVR | Monitor capable of accepting the 4K HDMI signal |
| Coax security camera | BNC input |
| TVI / AHD / CVI camera | Matching HD-over-coax support |
| Older analog CCTV | CVBS compatibility |
| Camera testing | Direct BNC viewing |
| Multi-device installation | BNC loop-out |
| Small security station | Compact footprint |
| Continuous monitoring | Monitor designed for surveillance use |
The Bottom Line
The best monitor for a security camera system isn't necessarily the monitor with the highest resolution or the largest screen.
It's the one that works correctly with the equipment you already have.
Start with the signal: HDMI or BNC?
Then check the format and resolution.
Then think about how the monitor will actually be used—at a security desk, beside a DVR, on an installer workbench, or as a direct camera display.
That approach makes it much easier to choose a monitor that fits the system rather than trying to make the system fit the monitor.
Need help choosing the right security monitor? Browse SecurityVideoDirect's surveillance monitors for DVR, NVR, BNC camera, and professional CCTV applications.