--- title: "How Car Park Barriers Work: Boom Gates Explained | Qyvea" url: https://qyvea.co.ke/how-car-park-barriers-work-kenya description: "How car park barriers work: motor, spring balance, boom arm, controller, loop detectors and photocells, and how they open with cards, remotes or ANPR." updated: 2026-10-17 --- > Markdown copy of https://qyvea.co.ke/how-car-park-barriers-work-kenya for AI assistants. Prices and stock change; check the live page. 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Why are you still getting out of the car in the dark to open your own gate? Read on: it takes a few minutes and could save you a lot more than that. **In this guide you will see:** - Motor + gearbox lift the arm; springs balance its weight. - Loop detectors sense vehicles; photocells add safety. - Triggers: remote, card, keypad, ticket, ANPR or guard button. Quick answer A car park barrier is a motor and gearbox that lifts a boom arm, balanced by springs so the motor does little work. A controller opens it when it gets a valid signal (card, remote, ticket or ANPR) and closes it once the vehicle has passed, using a loop detector in the road and safety photocells so the arm never comes down on a car. [Photo: geister / Unsplash](https://unsplash.com/photos/mMjM5hnTfJ0) Why this matters now ## Each evening of opening it by hand is another evening of risk at the exact moment you are most distracted. ### If you wait - Stepping out in the dark with a bag in your hand - A gate left open because nobody wants to close it - Anyone can follow your car in ### What you get - Open from the car, a remote or your phone - Closes behind you every time - A battery keeps it working in a power cut [Centurion Sliding Gate Motor](/products/centurion-sliding-gate-motor-3900 "Centurion Sliding Gate Motor")[Centurion 1ch remote](/products/centurion-1ch-remote-22327 "Centurion 1ch remote")[Centurion Gate Motor Battery](/products/centurion-gate-motor-battery-12v-7ah-48689 "Centurion Gate Motor Battery 12V 7Ah") [Get my free quote on WhatsApp](https://wa.me/254113301244?text=Hi%20Qyvea%2C%20I%20read%20your%20guide%3A%20How%20Car%20Park%20Barriers%20%28Boom%20Gates%29%20Work.%20I%20want%20an%20automatic%20gate%20sorted.%20Can%20you%20help%3F)Reply usually within 30 minutes. Free site survey in Nairobi and nearby counties. Real products, live prices, in stock now ## Key takeaways - Motor + gearbox lift the arm; springs balance its weight. - Loop detectors sense vehicles; photocells add safety. - Triggers: remote, card, keypad, ticket, ANPR or guard button. - Arm length and opening speed decide the model. - A manual release lets the arm be lifted in a power cut. ## The parts **Motor & gearbox**: Lift and lower the arm **Balance springs**: Counterweight the arm; must match its length **Controller**: Receives the open signal, runs the motor **Loop detector**: Wire loop in the road that senses a vehicle **Photocells**: Infrared safety beam across the lane **Trigger device**: Remote, card reader, ANPR or ticket machine ## One cycle Valid signalArm opensVehicle crosses loopLoop clearsArm closes See [boom barrier prices](https://qyvea.co.ke/boom-barrier-price-in-kenya) and [car park barrier not working](https://qyvea.co.ke/car-park-barrier-not-working-kenya). ## Frequently asked questions What makes a barrier close automatically? The loop detector or photocell tells the controller the vehicle has passed, then it closes. Can a barrier open with ANPR? Yes. The ANPR camera sends an open signal to the controller when a registered plate is read. What happens in a power cut? Barriers with battery backup keep working; otherwise the arm can be released and lifted manually. ## Why customers choose Qyvea **Genuine brands**: Manufacturer warranty on what we sell, so you are not gambling on the box. **One team, start to finish**: The people who advise you also install and support it. **Fast answers**: WhatsApp replies usually within 30 minutes, and delivery within 24 hours in Nairobi. **Easy to buy**: Pay by M-Pesa, bank transfer or card. Free delivery in Nairobi on orders over KES 5,000. **Risk taken off you**: 7-day returns and exchanges on products, and a workmanship warranty on installations. **Customers say so**: Rated 4.6/5 from 57 Google reviews. **Your next step takes one minute:** send us a photo of the place on WhatsApp and we will tell you what it needs. ## Related articles [Automatic Gates · Troubleshooting Car Park Barrier Not Working? Causes and Fixes A barrier that won't open, won't close or bounces: what's usually wrong and what to check. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/car-park-barrier-not-working-kenya)[Automatic Gates · Technology Explained Gate Safety Beams & Loop Detectors How safety beams and loop detectors stop a gate closing on a car or a child, and the beam faults that make gates refuse to close. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/gate-safety-beams-loop-detectors-kenya)[Automatic Gates · Technology Explained How Automatic Number Plate Recognition (ANPR) Works From the camera to the barrier: how ANPR reads a plate and decides whether to let a vehicle in. 2 min read**READ FULL ARTICLE →**](https://qyvea.co.ke/how-number-plate-recognition-works-kenya) ### Related services [ANPR & Parking Systems](https://qyvea.co.ke/anpr-parking-system-price-in-kenya)[Automatic Gates](https://qyvea.co.ke/automatic-gates)[Automatic Gate Repair](https://qyvea.co.ke/automatic-gate-repair-kenya) ### Related products [Best gate motors](https://qyvea.co.ke/best-automatic-gate-motor-kenya) ### Related projects [Gate motor pre-installation checks](https://qyvea.co.ke/projects#gate-motor-feature) [← Previous**How Automatic Number Plate Recognition (ANPR) Works**](https://qyvea.co.ke/how-number-plate-recognition-works-kenya)[Next →**: Number Plate Recognition for Gates: Homes, Offices and Compounds**](https://qyvea.co.ke/number-plate-recognition-for-gates-kenya) ## Need this system installed? Talk to Qyvea. We design, install and maintain it. Chat with us — 30 min response --- **Qyvea Limited** · Westlands, Nairobi, Kenya (delivery only, no walk-in pickup) · serving all 47 counties Phone/WhatsApp: [+254 113 301 244](https://wa.me/254113301244) · Email: info@qyvea.co.ke · Shop: [qyvea.co.ke/products](https://qyvea.co.ke/products) · Facts: [qyvea.co.ke/qyvea-facts](https://qyvea.co.ke/qyvea-facts)