News & articles
Arriva secures tram staff with Crystal Alarm
Arriva, which operates the Nockeby and Tvärbana tram lines, identified a need for improved safety for conductors following the replacement of ticket inspectors with SL barriers. After evaluating several providers, they chose Crystal Alarm and are highly satisfied with both the service and functionality.
A single press of the Crystal Button sends an alarm to traffic control, which automatically activates the phone's microphone so operators can hear what is happening in real time.
"After looking around the market, Crystal Alarm allowed us to quickly implement a system that works very well. Great service and an outstanding system with strong functionality – not just for alarms, but also for following up on test alarms."
— Mattias Wrangtorp, Project Manager responsible for the rollout.
Beacon Tuner for Android Devices
Crystal Alarm launches Beacon Tuner for Android, an app that simplifies the installation and maintenance of iBeacons for indoor positioning. The app displays all active beacons sorted by proximity, battery level per device, and enables colour coding to, for example, identify floor levels. Battery levels are automatically synced to the Self-Service Portal. Launch is planned for April.
March 31, 2026
Crystal Button CB20 – 5,000 Units Sent with Zero Returns
Crystal Alarm announces that their new personal alarm, the Crystal Button CB20, has received a strong reception since launch — with nearly 5,000 units delivered and not a single return. The button has been designed for demanding environments such as industrial, healthcare, and logistics settings, offering a range of up to 400 metres, a five-year battery life, and an IP67 rating. The CB20 uses a proprietary communication protocol for greater reliability than standard Bluetooth, and can be integrated with the Crystal Alarm App, Wi-Fi positioning, and Cisco infrastructure.
February 22, 2026