M2M/IoT in the industry

Using sensors for condition monitoring in building services engineering

Monitoring water heating systems to prevent legionella bacteria

Condition monitoring can prove very useful in building automation applications such as preventing legionella bacteria in a water heating system. Sensors continuously measure the system's supply and return temperatures, transmitting the data to our MC100 terminal, which acts as the "collection point", via Sigfox or wireless M-Bus. Depending on the location the terminal then forwards the data to a company server or the cloud via LAN or LTE. Facility managers or system operators are thus able to quickly identify any problems with the system. In addition to this, alerts can be directly transmitted if operating parameters deviate from standard settings.

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Battery-operated wireless sensors for easy installation

Wireless sensors which are suitable for measuring temperature are easy to install. Their probes are simply placed on the relevant pipes. No cabling is required since the rechargeable batteries guarantee power supply for a period of five years. Thanks to their simple operation mode and fast installation wireless sensors are significantly cheaper than wired models.

Multiple remote monitoring applications are possible

The MC100 terminal can receive data from a range of sensor models, allowing the data infrastructure described above to also be used for other additional purposes. These include sensors which measure humidity, CO2 levels or other information. Air quality can thus be remotely monitored parallel to the water heating system. 




Condition Monitoring

Condition monitoring is the continuous monitoring of the condition of devices, machines and mechanical systems. Sensors measure physical parameters such as temperature, pressure or filling levels at regular intervals and also collect, analyse and evaluate the corresponding data. Condition monitoring makes it possible to identify changes in processes more quickly and, for example, to better coordinate machine maintenance. In addition to this, remote monitoring can be used to identify errors early on so that repairs can be planned in good time and machine or system downtimes can be avoided.

Why legionella bacteria must be prevented

Legionella bacteria can cause illnesses such as Legionnaire's disease – a dangerous lung complaint. They thrive at temperatures from approx. 30 °C to 50 °C, when they are also most likely to multiply. This process is encouraged if water stagnates in a system over a longer period of time. To combat this, experts recommend that a temperature of at least 60°C is maintained at the water system outlet and of 55 °C at the point from which water is drawn.