The Extech RH520B is a paperless chart recorder that provides simultaneous digital and graphical display of %RH and temperature or dew point, as well as showing date/time and min/max values.
KANE358INT is an ergonomically designed flue gas analyzer with direct measurement of carbon monoxide (CO) and carbon dioxide (CO2),with protection of the sensors. Based on measured CO and CO2 values it calculates O2, so you don't have to use an electrochemical oxygen measuring cell, which wears very quickly in standard flue gas analyzers. It also measures NO (required by Romanian regulations), temperature and pressure.