Option for measuring the following additional gases which are listed by US Pharmacopoeia for medical air.
Nitrogen dioxide NO2 (0 – 7 ppm) using Electrochemical cell.
Nitric Oxide NO (0-7ppm) using Electrochemical cell.
Sulfur dioxide (0 – 7 ppm) using Electrochemical cell.
(NO2 and NO given as combined reading)