DirectSense Tox II lets user mix or match up to 5 gas sensors plus temperature from choice of ammonia nitrogen dioxide nitric oxide sulfur dioxide hydrogen cyanide ozone oxygen chlorine hydrogen chloride hydrogen carbon monoxide and others Learn more

Real-time ESLI (End of Service Life Indicator) resides in air purifying cartridge that protects user from toxic gas and vapor Indicator shows extent of use of carbon inside clear-shell cartridge letting user immediately see when to change Learn more