The Leesys interior ceiling station - 03/2018

Esslingen, 1 March 2018: A family of four dies of carbon monoxide poisoning due to a defective exhaust gas pipe of their gas heating system. A few months earlier, six teenagers died of carbon monoxide poisoning in a garden shed because they had not used a gas heater fan properly.

These current examples show that a carbon monoxide (CO) warning also makes sense in Germany and these deaths could have been avoided. These devices are compulsory in Great Britain and Ireland, Luxembourg is also considering introducing these devices for every household. In the Federal Republic of Germany there is currently only a smoke detector obligation and this is also regulated differently for each federal state. In addition to the use of gas heaters, fireplaces are also a potential source of CO. The installation of fireplaces is booming in Germany, as the cosy warmth is very much appreciated.


Leesys interior ceiling station

Leesys took the press reports about the deaths as an opportunity to reconsider the situation in living rooms. The smoke detector installed in another project for Leesys subsidiary TeleAlarm forms the basis for a new alarm unit. Leesys has developed a new ceiling station around the smoke detector with a diameter of only 40 mm, which accommodates the smoke detector and contains further useful sensors.

A carbon monoxide sensor, a sound sensor, a sensor for temperature and humidity and three ambient light sensors are located in a housing the size of many conventional smoke detectors.

The function of the CO sensor is life-saving: If carbon monoxide in the room is detected above a threshold value, an alarm is triggered. And even the smoke of a cigarette already produces carbon monoxide! The sound sensor indicates the presence of persons and provides feedback on the sound pressure level that has been correctly evaluated.

The temperature in living rooms is generally set with thermostats. Smart thermostats indicate the set temperature, which often does not correspond to the actual value. Due to the thermals in the rooms, the warm air not only collects on the ceiling, but is distributed relatively evenly throughout the room. The measurement in the ceiling station gives a more accurate value of the temperature in the room. By measuring the air humidity, a further value of the room climate is displayed. The humidity in living and working rooms is often too low in winter. An air humidity below 30 percent relative humidity often leads to respiratory problems, especially in older people.

With the ambient light sensors, the Leesys ceiling station measures the brightness in the room. Three sensors are installed in the housing and arranged in such a way that not only the brightest part of the window is detected, but also the darkest corner of a room. The processor in the ceiling station then calculates an average value.

For the TeleAlarm the device will be a pure measuring station, which in case of an alarm transmits the message via the TeleAlarm own protocol to the house emergency station. A further protocol can then be used to address the ceiling stations installed in other rooms. By networking, people in the bedroom, for example, are also alerted when an alarm is triggered in the living room.

However, the ceiling station only becomes truly "smart" when it becomes part of a Smart Home system. Leesys will equip the ceiling station with the Z-Wave protocol, the most widely used smart home standard.
The ambient light sensors can be used to control both the blinds and the light in the rooms. If the light in the apartment is only controlled by the time of day, you have the problem that it is dark in the room during thunderstorms, for example. With the help of ambient light sensors, optimum brightness can always be controlled in rooms.

The value of the measured humidity can then be used to control a humidifier. The medically recommended value of 40 to 60 percent relative humidity is easily controlled by the Smart Home control panel.

That a possible smoke, fire or CO alarm is reported to the mobile device is almost self-evident today. The siren, which warns people in the house of this danger, can also be used as protection against burglars. Integrated into the Smart Home system, which detects the opening of doors or windows, a loud alarm can be triggered by activating the siren, which makes it impossible for a burglar to continue his activity.

Leesys will be happy to implement additional protocols for the indoor ceiling station. The certified device for TeleAlarm and with the Z-Wave protocol will be available at the end of the year.