The Multisensor Plus and Its Features – An Overview

Blog entry - 30.10.2026

Debates about smoke alarms keep resurfacing in the media whenever the question of their necessity and the mandatory replacement requirement comes up. It’s important to note, however, that smoke alarms aren’t the only devices that contribute to safety in one’s home. The media often reports on multisensor devices and their functions, but these aren’t always accurately described in full. For this reason, here’s a recap of the most important features and facts about Techem’s Multisensor Plus.

Why is the Multisensor Plus used instead of a conventional smoke alarm? 
In addition to smoke, the Multisensor Plus detects heat, carbon monoxide, and humidity. Thanks to its built-in heat sensor, it is also suitable for use in the kitchen. Conventional smoke alarms can often trigger false alarms there due to cooking fumes. At the same time, however, the kitchen remains one of the most common causes of fires in homes. The Multisensor Plus enhances safety by detecting dangerous heat buildup—such as when kitchen devices overheat—before a fire even starts. The built-in CO sensor alerts occupants when carbon monoxide levels reach critical concentrations. This ensures that residents are warned in time about this health-threatening gas, which is undetectable by human senses.
If the humidity in the apartment is too high, the built-in LED provides timely reminders to ventilate, which can help prevent mold growth and thus protect both the residents and the building structure.

What data does the device record?
In addition to the smoke, heat, and carbon monoxide sensors, the Multisensor Plus features a room climate monitoring service that can be optionally enabled on a voluntary basis. If this service is activated by the residents, the Multisensor also measures humidity and temperature in the room. Data collection begins only after the service is physically activated. The data is then transmitted unidirectionally—that is, via a secure, one-way data channel—to Techem’s own servers in Europe. The data is stored and processed in compliance with the German Data Protection Act (DSGVO) exclusively with the residents’ explicit consent. Only after this consent is given is the respective residential unit activated for the indoor climate service.

Why does Techem focus on data collection and processing?
Through the activated indoor climate service, residents can view the indoor climate data for their apartment on the tenant portal mein.techem.de. There, the data is compiled into an app and presented clearly. The goal is to help create a healthy and comfortable living environment, alert residents to unfavorable indoor air conditions, and prevent potential mold growth using humidity data. The data provided enables tenants to take early action, such as ventilating or heating, when necessary. This benefits everyone involved: Tenants gain greater transparency regarding their indoor climate and can take targeted measures to ensure a healthy living environment, while landlords and property managers use the multisensor to help maintain the value of their property. The data collected is designed exclusively for evaluating the indoor climate. It is not possible to draw conclusions about the presence, number of people, or movement patterns within the apartment.

Would you like to learn more
For more information on the features, privacy, room climate service, and technical specifications of the Multisensor Plus, please visit
👉 www.techem.de/multisensorplus. 

Image caption: The Multisensor Plus enhances the functionality of a traditional smoke alarm with additional valuable safety features—providing greater protection for property and increased safety in homes (Image source: Techem).