· Optimized control of air conditioning systems

· Multiple applications – even in building technology

Bosch has designed a robust and reliable sensor for measuring the amount of carbon dioxide in the interior compartment of a car. The Climate Control Sensor provides a demand controlled circulating-air mode of air-conditioning systems. It guarantees a supply of fresh air to the passengers and allows for a more efficient operation of the system. Carbon dioxide (CO2) is a colorless, non flammable and odorless gas which occurs in nature in very low quantities. It is an essential part of the air and plays an important role in the environment – for instance in photosynthesis. If people sit in close proximity, they will deplete the available oxygen, which increases the CO2 content in the air. This results in decreased concentration.

Climate Control Sensor: fresh air for a clear head
The new Bosch sensor uses a spectroscopic method to selectively measure the air's CO2 content. It is possible to identify even small concentrations below 0.02 percent by volume. The robust and compact two-channel radiation detector enables a reference measurement. The sensor can be easily modified for measuring concentrations of other gases such as carbon monoxide (CO) or natural gas.

Variety is one of the big assets of the Bosch sensor with the dimensions of a cigarette pack. In further upgrades, the Climate Control Sensor also acts as a multi sensor for automatic air conditioning systems. It supplies information on temperature and humidity inside the passenger compartment, thus helping to improve comfort and safety. In future vehicle air conditioning systems using CO2 (R 744) as a coolant, the new Bosch sensor can also be used to monitor a leakage in case of malfunction. The sensor is, moreover, also of service in facility management: the carbon dioxide concentration increases usually in meeting and conference rooms and participants will easily tire. With the new Bosch Climate Control Sensor it would be easy to supply fresh air through the building's ventilation system.

The Bosch Group is a leading global supplier of technology and services. In the areas of automotive and industrial technology, consumer goods, and building technology, some 275,000 associates generated sales of 38.2 billion euros in fiscal 2009. The Bosch Group comprises Robert Bosch GmbH and its more than 300 subsidiaries and regional companies in over 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for growth. Each year, Bosch spends more than 3.5 billion euros for research and development, and applies for some 3,800 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficial. The company was set up in Stuttgart in 1886 by Robert Bosch (1861-1942) as “Workshop for Precision Mechanics and Electrical Engineering.” The special ownership structure of Robert Bosch GmbH guarantees the entrepreneurial freedom of the Bosch Group, making it possible for the company to plan over the long term and to undertake significant up-front investments in the safeguarding of its future. Ninety-two percent of the share capital of Robert Bosch GmbH is held by Robert Bosch Stiftung GmbH, a charitable foundation. The majority of voting rights are held by Robert Bosch Industrietreuhand KG, an industrial trust. The entrepreneurial ownership functions are carried out by the trust. The remaining shares are held by the Bosch family and by Robert Bosch GmbH. Additional information can be accessed at www.bosch.com.

PI5052 - November 2005