By the SightShield team · · 3 min read
Why gate safety matters
Automatic gates are heavy and move with force. Without proper safety devices they can trap or hit a child, a pedestrian or a pet, or damage a car that stops in the opening. Reports of accidents involving powered gates appear around the world every year, and nearly all of them involve gates without working safety devices. Safety is not an optional extra — it is part of a correct installation.
The layers of protection
| Device | What it does |
|---|---|
| Photocells (safety beams) | An infrared beam across the opening; if broken while closing, the gate stops and reverses |
| Obstacle detection | The controller senses extra resistance and reverses the gate |
| Safety edges | Pressure-sensitive rubber strips on the gate edge that trigger on contact |
| Force and speed settings | Limit how hard and fast the gate moves, especially near the end of travel |
| Flashing light | Warns that the gate is about to move or is moving |
| Vehicle loop (barriers) | Keeps a boom raised while a car is beneath it |
Where photocells should go
- Across the opening at bumper height (around 50 cm) to detect cars and adults.
- A second, lower pair for gates where small children or pets are present.
- On sliding gates, also consider a pair across the area where the gate slides back along the wall, if people walk there.
- On swing gates, inside the swing area so people standing behind a leaf are detected.
- Mounted on posts or pillars where they will not be knocked by vehicles.
Types of safety edge
| Type | How it works | Notes |
|---|---|---|
| Resistive edge | A pressure-sensitive rubber profile changes resistance when pressed | Common on sliding gates |
| Optical edge | A light beam inside the rubber is interrupted when pressed | Fast response; used on industrial gates |
| Wireless edge | Transmits the signal by radio to the controller | Useful on moving gates without trailing cables |
Standards and good practice
Internationally, powered gates are commonly assessed against the European standard EN 12453:2017, which covers safety in use and the test methods for force limits and safety devices (it replaced the older EN 12445). India does not have an equivalent mandatory standard for gate operators, but a professional installer should follow the same principles: at least one pair of photocells, obstacle detection set correctly, a warning light, and a manual release.
Gate Motor Speed and Noise →A 2-minute monthly safety test
- 1. Start closing the gate, then walk an object (a cardboard box, not a person) through the photocell beam. The gate should stop and reverse.
- 2. Hold a soft object against the gate edge as it closes. It should reverse on contact.
- 3. Check the flashing light works.
- 4. Clean the photocell lenses — dust, cobwebs and leaves are the main cause of faults.
- 5. If any test fails, switch the gate to manual and call for service.
Keep children away
Even with good sensors, gate remotes should be kept away from children, and children should be taught never to play near or ride on a moving gate. In apartments, the association should brief security staff on safe operation.
Safe gate automation installation →Quick answers
Why does my gate keep reversing when it closes?+
The photocells are often blocked or misaligned — by dust, leaves, a parked vehicle or a knocked post. Clean and realign them.
Can safety sensors be added to an existing automatic gate?+
Yes. Most controllers have inputs for photocells and safety edges, and they should be added if missing.
Are photocells enough on their own?+
They are the main protection, but should be combined with obstacle detection, correct force settings and a warning light.
Do swing gates need safety edges?+
They are recommended where people could be caught between the leaf and a wall or pillar; photocells alone may not cover those points.
How long do photocells last?+
Many years, if kept clean, aligned and protected from water ingress.