Minor hardware change

New gas

Non dispersive infra-red technology dominates low-cost and high reliability sensing of carbon dioxide. The technology can utilize drift compensation and thus be fully maintenance free with maintained high accuracy for more than 15 years. Compared to other technologies, it is highly accurate, cannot be poisonous and does not suffer from cross sensitivity.

These benefits can also be utilized for other gases. Our spectroscopy scientists can investigate your needs and simulate tradeoffs between resolution, accuracy and cross sensitivity. They will also help to select a suitable light source, detector technology, IR-filter characteristics and optical path arrangements. We have previous experience from a wide range of gases such as nitrous oxide, ozone, methane and a wide range of other hydrocarbons, different refrigerants (Freon), ammonia, ethanol, carbon monoxide and water vapor.   

After the spectroscopy team have made a design, the optical filters are ordered and proof-of concept prototypes are built and evaluated. After the prototype evaluation is finished the product development process, similar to standard development, will take place. Here the lead times for filter production and calibration gas fabrication can be bottlenecks and is thus prioritized as early as possible in the project.

Also, the production process has to be re-considered as a new gas is approached since that gas must be handled in our production system. This does not only involve hardware change and adaption but also safety, quality and environmental aspects.  



The Senseair sales office in the USA was contacted by a company working with air conditioning units. Another branch of that company has been a Senseair customer for a long period of time as an OEM producer using carbon dioxide sensors.

In order to develop more environmental friendly air conditioning units, the refrigerant gas had to be replaced with one that is mildly flammable. In order to eliminate the risk of fire caused by leaking gas a safety gas detector is preferred.

A project team was set up at Senseair and two of our technical experts met the customer together with the sales team in USA. The spectroscopic behavior of the gas and possible cross sensitivities was investigated by the research team. A design based on the low-cost module S8 with a custom designed filter was proposed for the specified application. Optical filters and calibration gas was ordered and prototypes were built.

Within six months from project start a set of prototypes had been shipped to the customer for evaluation in their research lab. The prototype development was fully financed by Senseair since we have a long business relation with this customer, know them well and find a strategic value in this business segment.