Due to the large volume of air that most hospitals consume, on-site production is normally the most practical and cost effective method of supply. This is accomplished by compressing ambient air with medical air compressors which have to be strictly maintained and ensure that the risk of contamination is minimised as much as possible.

Medical grade compressed air is used for a variety of applications, ie respiratory systems or processes, ventilation, substitute for nitrous oxide in anaesthesia, instruments, and pneumatically powered surgical tools. These compressed air systems normally have filters or special scrubbers to remove carbon monoxide and other pollutants, but this is not enough, as the system has to be tested and verified (or certified) on a regular basis.

Sigma Sensing is offering for this purpose a portable or fixed installation unit of the CAGP100 series that can monitor the correct levels of CO and CO2 in the system. The unit includes an infrared sensor for CO2 and an electrochemical sensor for CO. The sensors monitor the air in ambient pressure as the compressed air pressure is reduced to ambient pressure for air sampling in a low pressure measurement chamber.

The standard set includes the main instrument, a flexible 1m teflon pipe with quick coupler, and a soft carrying case.
medical grade & breathing compressed air

with new generation, cutting edge 32 bit digital signal processing technology for CO2 with solid reliability, LCD ppm CO2 indication, provides a very stable, output requiring less frequent calibration, with typical long sensor life expectancy.


CO2 sensor

Measuring range: 0~2000 ppm CO2
Operating principle: NDIR
Repeatability: better than 0.1%
display: 4 digits
Response time: Less than 1 minute

CO sensor

measuring range: 0-50 ppm
operating principle: electrochemical sensor
resolution: 1ppm
display: 3 digits

common specs

Operating temperature: 0…..+50C (32…..+122F)
Operating humidity: 0-90%
gas sampling method: Diffusion or sample draw
power supply: 110VAC or 230VAC