Kimo has a wide variety of electrochemical interchangeable sensors.

O2 long life : 0-21 %

CO-H2 : 0-8,000 ppm

NO : 0-4,000 ppm and NO low range : 0-500 ppm

NO2 : 0-1,000 ppm

SO2 : 0-5,000 ppm

CH4 : 0-10,000 ppm