This is a simple mount to install an MH-Z19E carbon dioxide sensor into an ESP8266-enabled IKEA VINDRIKTNING air quality sensor. It's designed to be used with terminal-type (see picture) MH-Z19E, but other suffix with the same dimension should work as well (won't work with pin header version). The sensor is mount on the intake side of the air duct and won't be affected by the fan (which is at the outlet side). The mount is a pretty tight fit. Do not press it really hard into the case, just make sure the strud top is on the same level (see picture) and the front cover will close together.
The author marked this model as their own original creation.