Are you also having a headache: How to choose a surveillance screen? Where to buy it?

Are newbies who are new to the monitoring system often dizzy by various parameters? What are P2.5, 5000nits, refresh rate... I just want to buy a display that can see the picture clearly, but how do I feel like I am studying rocket launches? Today we will talk about it in human language.​The way to purchase monitoring screens​Where is it?

The bigger the monitoring screen, the better.​Scene matching is the king​

Don't rush to compare the parameters first, you have to think of three questions first:

1. ​​Indoor or outdoor?​​

   • The indoor parking lot has a brightness screen of 800cd/m², but​Outdoor intersections must be at least 4000cd/m²​Only then can withstand the sun
   • The rainy areas in the south have to look at the IP65 waterproof level. The extremely cold areas in the north have to choose a model that can be started even at -30℃.

2. ​​How long does it take to see the picture?​​

   • You must use a spacing below P4 when viewing the license plate 20 meters away. It is recommended to view the details of the face within 5 meters.
   • For example, it is more cost-effective to use P2 screens for cashier surveillance in convenience stores, and P6 screens for high-speed mounts.

3. ​​Does it take 24 hours to complete the round?​​

   • The traffic monitoring screen that is open all year round must be selected with an intelligent temperature control system.​Life life is 3 times longer than ordinary screen​​
   • The rental screen for temporary activities is lighter, and the aluminum-magnesium-zinc box with quick disassembly structure can save 30% of the installation time

Three major pitfalls that you are most afraid of when buying a surveillance screen

​​Tap ①: Only look at the price but not the accessories​
Some merchants have kept the host price very low, but the turn head doubles the charge on the power cord and control card. Remember to ask the complete set includes:

• Number of power adapters (1 with 4-6 modules)
• Signal transmission line type (network cable or fiber optic)
• Control whether software is charged for updates

​​Tap ②: Play text game with virtual parameters​
Products marked "5000nits brightness" on Taobao may only be the highest value measured in the laboratory. It depends on the actual useContinuous working brightness​, only those who can be stable at more than 4000nits are considered qualified

​Pit ③: Ignore installation environment restrictions​
There was a case last year when a community installed an ordinary indoor screen as outdoor monitoring, and the control card was burned during the rainy season. Always confirm:

• Wall load bearing (outdoor screen weighs 30-50kg per square meter)
• Heat dissipation space (leave at least 50cm of ventilation on the back)
• Power supply line (single traces to avoid voltage instability)

Comparison of online vs offline purchasing channels

​Key reminder:​ Don’t believe in industrial products such as "the lowest price on the entire network", surveillance screens,There is definitely a problem with the price below 20% of the industry average price​. Last year, market supervision seized "special price screens" renovated with second-hand lamp beads.

Hidden knowledge points for installation and maintenance

​Three things to do before installation:​

1. Use an infrared thermometer to check the installation wall temperature (a heat sink must be installed if it exceeds 45℃)
2. Test the stability of the power supply (voltage fluctuations exceeding ±5% must be equipped with a voltage regulator)
3. Simulate lighting in different times (avoid screen reflection affecting the monitoring viewing angle)

​​Daily maintenance cold knowledge:​

• Use a brush to clean the gaps of the module once a month (don't use a wet cloth!)
• I found that the color of a certain area has become darker, check the oxidation status of the cable interface first.
• It is best to replace the firmware once every three years, just like the mobile phone system needs to be upgraded.

Editor's opinion

It’s not difficult to buy a surveillance screen. The key isDon't be confused by the fancy functions​, remember the "three-looking" principle: look at actual needs, real cases, and after-sales commitments. Those manufacturers that promise "five years of replacement" are much more reliable than those who only know how to fight price wars. Next time, someone will brag about how powerful the 4K surveillance screen is, and ask him directly: Do you dare to sign a zero-death light agreement during the warranty period for this screen?

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