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Programmable bell timer with web-based scheduling software for simple DIY installation
Upgrade your existing bell scheduling software with network-enabled, IP-based solution.
Easy to install, web-based programming, compatible with most of the systems in the market, perfect for schools, warehouses, and factories.
For schools, factories, and warehouses still relying on outdated bell scheduling systems, it’s time for a simple upgrade. The TCP/IP-based Netbell® network bell controller fully automates bell scheduling and timing for class changes, shift rotations, breaks, and any other recurring events—without infrastructure changes.
Our network-enabled controllers make break time management effortless with plug-and-play installation, intuitive web-based scheduling, and reliable operation. No complex wiring, no software installation, no IT headaches.

At Linortek, we make automation simple. Our Netbell web-based bell scheduling software is easy to use, so you can focus on what matters, not technology. With no unnecessary complexity — just straightforward, reliable systems and a supportive team — they’re so easy even your maintenance personnel could install them!
Create schedules for breaks and shift changes, automated reminders from standard browser
Program and control up to 500 unique events for break times, shift changes, fire drills, and routine announcements with precise timing from any web browser
Built-in real-time clock with automatic NTP time sync and Daylight Savings adjustment
Dry contact bell outputs (up to 8A) that can be used with almost any bells in the market
Save thousands on professional installation costs with easy setup requiring just basic tools that your maintenance team can handle.
Start small and add more controllers at any time as your business grows – without rewiring your entire facility
If you already have a public address (PA) system in place and your PA system has a built-in tone generator, the Netbell Bell Controller can be used to activate the built-in tones from your PA system for break time alerts and notifications. It is compatible with popular systems like Bogen, Valcom, and other school/factory PA systems, eliminating the need to invest in a separate bell system.
No tone generator from your existing PA system but still want to add the break scheduling function? Netbell has you covered! Use our Netbell-NTG PA system controller! The Netbell-NTG PA system controller comes with tone generation and event scheduling software in one compact unit. Click here to learn more!
To control your existing bell system, we offer multiple Netbell Network Controllers (Netbell-Ultra 300, Netbell-2, Netbell-4K and Netbell-8) – compatible with most systems from low voltage to line voltage.
Upgrading is simple: connect your bells, plug the controller into your network, and take control. No infrastructure changes, no software installation, no complex programming. Perfect for schools transitioning from mechanical timers to smart scheduling, or any facility looking to modernize their bell system without a complete replacement.
The Netbell family is growing. From a simple bell timer replacement to a comprehensive facility-wide IP paging system for break time alerts, emergency notifications for OSHA complaint, we have the solutions. All of our solutions are simple to deploy, powerful in operation. Choose the perfect solution for your business needs.
Upgrade your mechanical bell timer with web-based controller
Transform your existing bell system with our network-enabled, IP-based solution. Perfect for precise timing in schools of any size.
Add break time & pre-recoded messages to your existing PA system
Add automatic break time alarms, routine reminders, and emergency notifications to your existing PA system.
Extra loud break bell system designed for high ambient noise environments
Need a new system? Our complete buzzer systems provide everything you need to setup a break time alarm system in your facility.
Break bell system for medium or loud noise facilities such as schools
Need a new system? Our complete bell systems provide everything you need to setup a break time alarm system in your facility.
Business Information Display Platform
Transform existing displays into powerful information dashboards with real-time messages and emergency notifications.
Plug-and-play IP-based PA systems with simple DIY installation
Live paging, campus-wide announcements, and emergency messages—all integrated into one powerful system.
Check our bell controller options below to pick a right product for your project.
| Model | Netbell-Ultra 300 | Netbell-2 | Netbell-4K | Netbell-8 | Netbell-K24/12 | Netbell-NTG |
|---|---|---|---|---|---|---|
| Part Number | 01-910-00125 | 01-910-00014 | 01-910-00035 | 01-910-00015 | 01-910-00103 | 01-910-00059 |
| Software | Built-In Web-based Scheduling Software | Built-In Web-based Scheduling Software | Built-In Web-based Scheduling Software | Built-In Web-based Scheduling Software | Built-In Web-based Scheduling Software | Built-In Web-based Scheduling Software |
| Tone Generator | No | No | No | No | No | Yes |
| Can Be Used for Existing PA | Yes, 2 built-in tones | Yes, 2 built-in tones | Yes, 4 built-in tones | Yes, 8 built-in tones | No | Yes, tones or messages |
| Event Schedules | 10 sets, up to 500 events | 1 set, up to 500 events | 1 set, up to 500 events | 1 set, up to 500 events | 1 set, up to 500 events | 1 set, up to 500 events |
| Bell Output(s) | 2 (Dry, 30VDC@1A) | 2 (Dry, 48VAC@8A) | 4 (Dry, 48VAC@8A) | 8 (Dry, 12/24V@5A) | 1 (Wet, 24VAC/12VDC@1.6A) | 2 (Dry, 48V Max, 12VDC/5A) |
| Enclosure | DIN Rail Mountable | DIN Rail Mountable | ABS, IP66 | Bare Board | ABS, IP66 | Polycarbonate |
| Manual Control | Yes | Yes | Yes | No | Yes | Yes |
| Buy Now | Buy Now | Buy Now | Buy Now | Buy Now | Buy Now |
Find the Perfect Solution for Your Unique Needs
Every facility has different requirements. That’s why we’ve developed a comprehensive range of Netbell products to match any application:
The Linortek advantage: intuitive web interface, precision timing, and true plug & play installation. Your fully automated IP-based alert system will be up and running in minutes, not days.

Don’t just take our word for it – hear from the engineers and facility managers who rely on our controllers every day.
At Linortek, customer satisfaction is our top priority. Our support team is consistently praised for their knowledge, responsiveness, and willingness to go the extra mile.
Our commitment to you:
√ Responsive communication
√ Expert product knowledge
√ Troubleshooting assistance
√ Installation guidance
√ Ongoing support for the life of your product
Posted on Google marek konarkowskiTrustindex verifies that the original source of the review is Google. Maria is a GREAT technician and a person as well. Very knowledgeable and very helpful. Very patient too :) Thank you Maria very much !Posted on Google Technology DepartmentTrustindex verifies that the original source of the review is Google. System was great to install and gave us the precision timing for our bells needed to integrate the new time driven and time dependent sync, thanks for making such a great product.Posted on Google Dale GruberTrustindex verifies that the original source of the review is Google. I purchased 3 Netbell systems for our manufacturing plant. First, the buzzers work great and have helped our breaks start and stop much more consistently. Even more, their customer support is INCREDIBLE. Maria is the best I've ever been helped with. She first helped me get everything wired and installed myself. About a year later, she helped me on the live chat on their website and she walked me through everything so well. Everyone dreads customer support. With this company and Maria, it is actually super helpful. You don't wait forever. You don't wait for responses. You are dealing with really brilliant and personable people. I'm just super impressed.Posted on Google Bookkeeper AtchleyTrustindex verifies that the original source of the review is Google. We were in serious need of help and Maria was AMAZING! HIGH recommendation!Posted on Google eric sandlinTrustindex verifies that the original source of the review is Google. Maria was so helpful. I had a connection problem and she help me for two days until we solved the issue. Thank you Maria!!!!Posted on Google Steve MTrustindex verifies that the original source of the review is Google. Cool product, but the service is the best part! Maria is always willing and able to help, and responds very quickly (even on her day off!) Thanks Maria!Posted on Google arturo garciaTrustindex verifies that the original source of the review is Google. I will make mine short. we had issues with trying to get connected to our network. Maria one of the support techs helped me out for about 4 hours trying to get it connected to our network. after exhausting all our options we found out that with our upgraded network we needed to get IT involved to let this device talk to network. now it is just a matter of getting all the timers dialed in and putting it in operation.Posted on Google Jeremy McElroyTrustindex verifies that the original source of the review is Google. The school I work for has been using a Linortek bell system for years and we just upgraded to a new bell/PA system combo. We're still in the process of installation but so far, they have been super helpful in answering all our questions and talking us through details, and I have been very happy with the quality of the new system in my initial testing. Highly recommend!Posted on Google Melora ChangTrustindex verifies that the original source of the review is Google. Tatiana, Maria, and Liyu are fantastic to speak to. They made everything so easy and smooth. Such a great team of people to do business with (sales, it, and management). Their service is fantastic. Thank you!
Upgrade to Netbell Network Bell System today and experience the perfect blend of simplicity, reliability, affordability, and support. Answer a few questions and save up to 20% today!
Linortek’s products are designed, manufactured, and supported in the USA, ensuring the highest standards of quality.