Bacharach IEQ Chek 1540-2009 Indoor Environment Quality Monitor with CO2 0-20% and O2 sensors - DISCONTINUED

Bacharach’s 1540-2009 IEQ CHEK Indoor Environment Quality Monitor with CO₂ 0-20% and O₂ sensors offers all the features of their 1540-0009 IEQ Chek Indoor Environmental Quality Monitor, but comes with an additional O2 sensor.

No need for an O2 sensor? Click here to see Bacharach’s 1540-0009 IEQ Chek with a CO2 sensor.