can a MEMS Gas Sensor be installed outside

I previously made this outdoor measurement with a commercial handheld gas detector that was placed in a plastic box that shielded it from rain, but let air pass through.   This measurement was VOC pollution next to a factory.

I would like to perfect the technique using a Gravity sensor.    Has anyone installed one of these outdoors for many days?   My main worry is condensation forming, so I was thinking of covering the circuitry with a rubberized coating.   TIA

Ken D.