"It was exactly what I was looking for: a unique system that has already proven itself and simply does what it is supposed to do."
Product: ARA-Pro Next
Sector: Water Management
Adésys's always reliable alarm notification system works like a charm

The Water Laboratory in Haarlem manages systems at locations in Brakel and Nieuwegein that are connected via VPN. Thanks to ARA-Pro Next from Adésys, everything is monitored centrally. The combination of ARA-Pro Next, the duty schedule and the REST API forms an indispensable link in the complex technical process of water intake monitoring.
Ensuring the quality of the water used to produce drinking water 24/7 is one of the daily realities at the Water Laboratory (HWL). Their biological and chemical monitoring systems continuously measure water quality at various intake locations. Water fleas, light bacteria and extensive chemical analyses provide timely insight into changes in the water that ultimately becomes drinking water. These systems had been running stably for years. It was time to take a closer look at the alarm notifications.
More people, more control, more coordination
For years, HWL used mobile phone modems to send text message alerts. That worked, but a new, larger team was added that became responsible for maintaining the instruments. In addition, there was still a real chance that an alarm notification sent by text message would not be heard. In this world, that is not a minor detail, but a risk. For that reason, a solution was sought that was more reliable, more centralised and more scalable.
Eric Penders, senior advisor on biological water quality at HWL, has been a pioneer in biological monitoring and data interpretation for almost 30 years. He went in search of an alternative and discovered Adésys.
From initial contact to solution
The information on the website about ARA-Pro Next caught his attention. A conversation followed and it soon became clear that the method of reporting via voice or text message, the distinction between day and night reports, the duty schedule and, above all, the possibilities of the REST API were the answer to his question. ‘It was exactly what I was looking for: a unique system that has already proven itself and simply does what it is supposed to do,’ says Eric Penders.
During the conversation, it quickly became clear that ARA-Pro Next could be perfectly integrated with the alarm dashboard that HWL had developed itself using a Raspberry Pi and RShiny. The existing mobile phone modems could remain on site and establish an active connection to HWL, where monitoring, reporting and release take place.
Fast, clear and hassle-free implementation
Penders' script for testing the REST API link was up and running within two hours. That's why the collaboration was a natural fit from day one: short lines of communication, clear language and no unnecessary documentation. Eric knew exactly what he needed, and Adésys specified exactly what HWL had to deliver. Penders on the result: ‘The notification always comes through, via the REST API and the script. That gives us absolute confidence and the system runs like clockwork.’
In addition, the REST API link ensures that all notifications are forwarded digitally and fully integrated to the central HWL alarm dashboard, without any manual intermediate steps. The periodic ping requests continuously monitor whether all systems are active and accessible, a crucial part of 24/7 water intake monitoring. Finally, the comprehensive logbook offers complete transparency: you always have insight into which notification was sent when, by whom and how it was responded to.